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	<title>DMA | 株式会社アイテス</title>
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		<title>DMAによる熱劣化ゴムの評価</title>
		<link>https://www.ites.co.jp/chemistry/index/thermal-analysis/dma-of-heat-degraded-rubber.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Fri, 09 Jan 2026 07:01:15 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=48704</guid>

					<description><![CDATA[<p>ゴムが熱劣化するとゴム弾性が失われ硬くなるものがあります。これを評価する手法は幾つかありますが、DMAによる動的粘弾性測定により低温～高温にかけての状態評価が可能です。 動的粘弾性測定による熱劣化ゴムの評価を紹介します。... </p>
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The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/dma-of-heat-degraded-rubber.html">DMAによる熱劣化ゴムの評価</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></description>
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									<p>ゴムが熱劣化するとゴム弾性が失われ硬くなるものがあります。これを評価する<span style="font-size: 15px;">手法は幾つかありますが、DMAによる動的粘弾性測定により低温～高温にかけての</span><span style="font-size: 15px;">状態評価が可能です。</span></p><p><span style="font-size: 15px;">動的粘弾性測定による熱劣化ゴムの評価を紹介します。</span></p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">熱劣化試験と動的粘弾性測定</h2>				</div>
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									<p>熱劣化試験に適した装置として槽内空気を循環させることの出来る<span style="font-size: 15px;">恒温槽を使用し、NBRゴム、EPDMゴムを100℃にて所定時間加熱し、</span><span style="font-size: 15px;">加熱時間による粘弾性挙動の変化を調べました。</span></p>								</div>
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									<p>どちらのゴムも加熱時間が長くなるに従いtanδ（=E”/E’ ）はピークが高温側にシフトし、ピーク値が減少する様子が見られました。ゴム弾性が失われ弾性率が低下した結果、Tgが高温側にシフトしたと考えられます。</p>								</div>
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									<p><span style="color: #0000ff;"><strong>動的粘弾性の測定により材料劣化に伴う物性変化の確認と、構造変化の推定の手掛かりを得ることが可能になります。他の化学分析を行えばより具体的な化学構造変化を明らかにすることも可能です。</strong></span></p><p><span style="color: #0000ff;"><strong>アイテスでは劣化試験から物性評価、化学分析まで一貫して対応致します。</strong></span></p>								</div>
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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/dma-of-heat-degraded-rubber.html">DMAによる熱劣化ゴムの評価</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></content:encoded>
					
		
		
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		<title>ゴム材料の反発性・振動吸収性評価</title>
		<link>https://www.ites.co.jp/chemistry/index/thermal-analysis/rubber_resilience_absorption.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Tue, 15 Jul 2025 07:59:10 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=47861</guid>

					<description><![CDATA[<p>衝撃、振動防止のため、低反発・振動吸収性材料が様々な場面で使用されています。 これらの特性の指標として粘弾性が挙げられます。ゴム材料の反発性、振動吸収性を動的粘弾性測定（DMA）により評価した事例を紹介します。 ゴムの振... </p>
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The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/rubber_resilience_absorption.html">ゴム材料の反発性・振動吸収性評価</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></description>
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									<p>衝撃、振動防止のため、低反発・振動吸収性材料が様々な場面で使用されています。</p><p>これらの特性の指標として粘弾性が挙げられます。ゴム材料の反発性、振動吸収性を動的粘弾性測定（DMA）により評価した事例を紹介します。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">ゴムの振動吸収性比較（温度分散測定）</h2>				</div>
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									<p>二種類のゴム材料を用いて動的粘弾性測定を行いました。</p>								</div>
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															<img loading="lazy" decoding="async" width="800" height="516" src="https://www.ites.co.jp/wp-content/uploads/measurement_result-1-1024x660.jpg" class="attachment-large size-large wp-image-47863" alt="温度分散測定_結果" srcset="https://www.ites.co.jp/wp-content/uploads/measurement_result-1-1024x660.jpg 1024w, https://www.ites.co.jp/wp-content/uploads/measurement_result-1-300x193.jpg 300w, https://www.ites.co.jp/wp-content/uploads/measurement_result-1-768x495.jpg 768w, https://www.ites.co.jp/wp-content/uploads/measurement_result-1-1536x989.jpg 1536w, https://www.ites.co.jp/wp-content/uploads/measurement_result-1.jpg 1585w" sizes="(max-width: 800px) 100vw, 800px" />															</div>
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									<p>ゴムA：NBR</p>								</div>
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															<img loading="lazy" decoding="async" width="233" height="61" src="https://www.ites.co.jp/wp-content/uploads/095632.jpg" class="attachment-large size-large wp-image-47880" alt="ゴムA：NBR" />															</div>
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									<p>ゴムB：EPDM</p>								</div>
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															<img loading="lazy" decoding="async" width="767" height="244" src="https://www.ites.co.jp/wp-content/uploads/epdm-1.png" class="attachment-large size-large wp-image-47873" alt="" srcset="https://www.ites.co.jp/wp-content/uploads/epdm-1.png 767w, https://www.ites.co.jp/wp-content/uploads/epdm-1-300x95.png 300w" sizes="(max-width: 767px) 100vw, 767px" />															</div>
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															<img loading="lazy" decoding="async" width="788" height="317" src="https://www.ites.co.jp/wp-content/uploads/measurement_detail.png" class="attachment-large size-large wp-image-47866" alt="温度分散測定_詳細" srcset="https://www.ites.co.jp/wp-content/uploads/measurement_detail.png 788w, https://www.ites.co.jp/wp-content/uploads/measurement_detail-300x121.png 300w, https://www.ites.co.jp/wp-content/uploads/measurement_detail-768x309.png 768w" sizes="(max-width: 788px) 100vw, 788px" />															</div>
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									<p>ゴムAはゴムBより-10℃以上の温度帯でE”、tanδが大きく、振動吸収性に優れる（反発性が低い）と考えられます。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">ゴムの振動吸収性比較（周波数分散測定-マスターカーブ）</h2>				</div>
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									<p>ゴムA、Bの周波数に対する動的粘弾性を比較しました。マスターカーブ作成により、実測できない周波数帯に対する粘弾性挙動も予測可能です。</p>								</div>
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															<img loading="lazy" decoding="async" width="800" height="803" src="https://www.ites.co.jp/wp-content/uploads/measurement_result_2.png" class="attachment-large size-large wp-image-47867" alt="周波数分散測定_結果1" srcset="https://www.ites.co.jp/wp-content/uploads/measurement_result_2.png 943w, https://www.ites.co.jp/wp-content/uploads/measurement_result_2-300x300.png 300w, https://www.ites.co.jp/wp-content/uploads/measurement_result_2-150x150.png 150w, https://www.ites.co.jp/wp-content/uploads/measurement_result_2-768x770.png 768w" sizes="(max-width: 800px) 100vw, 800px" />															</div>
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									<p>ゴムAはゴムBより広範な周波数帯でtanδが大きく、振動吸収性に優れると考えられます。</p>								</div>
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									<p>温度に対する動的粘弾性から、使用環境における材料の振動吸収性、反発性などを予測可能です。周波数に対する動的粘弾性から、地震動などに対する制振性能、タイヤのブレーキ性能予測、低周波数域では、クリープのような長期に亘る変形挙動予測等に活用できます。</p>								</div>
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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/rubber_resilience_absorption.html">ゴム材料の反発性・振動吸収性評価</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></content:encoded>
					
		
		
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		<title>CFRPの動的粘弾性測定</title>
		<link>https://www.ites.co.jp/chemistry/index/thermal-analysis/cfrp.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Tue, 01 Jul 2025 08:03:33 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=47692</guid>

					<description><![CDATA[<p>軽量かつ高剛性、高強度なCFRP（炭素繊維強化プラスチック）はスポーツ用品、航空機、自動車部品等に使用されています。DMAによる動的粘弾性測定を行う場合、CFRPは一般に高弾性であり、その使用用途から曲げモードによる測定... </p>
<div class="textAR"><a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/cfrp.html" class="morelink">続きを読む→</a></div>
The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/cfrp.html">CFRPの動的粘弾性測定</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></description>
										<content:encoded><![CDATA[<div data-elementor-type="wp-post" data-elementor-id="47692" class="elementor elementor-47692" data-elementor-post-type="chemistry">
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									<p>軽量かつ高剛性、高強度なCFRP（炭素繊維強化プラスチック）はスポーツ用品、航空機、自動車部品等に使用されています。DMAによる動的粘弾性測定を行う場合、CFRPは一般に高弾性であり、その使用用途から曲げモードによる測定が適していると考えられます。</p><p>曲げモードによるCFRPの動的粘弾性測定を紹介します。</p>								</div>
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			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-5ee1329 elementor-widget elementor-widget-heading" data-id="5ee1329" data-element_type="widget" data-e-type="widget" data-widget_type="heading.default">
				<div class="elementor-widget-container">
					<h2 class="elementor-heading-title elementor-size-default">曲げモードによるCFRPの動的粘弾性測定</h2>				</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-b41e420 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="b41e420" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-25bce1e" data-id="25bce1e" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-78969df elementor-widget elementor-widget-text-editor" data-id="78969df" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p>エポキシ樹脂をマトリクスとした平織りのカーボンファイバーからなるCFRPについて、両持ち曲げモードにてDMA測定を行いました。</p>								</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-8d09f70 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="8d09f70" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-3d730f3" data-id="3d730f3" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-7f5e341 elementor-widget elementor-widget-image" data-id="7f5e341" data-element_type="widget" data-e-type="widget" data-widget_type="image.default">
				<div class="elementor-widget-container">
															<img loading="lazy" decoding="async" width="768" height="562" src="https://www.ites.co.jp/wp-content/uploads/29d3bc99193cb0b837fb8cc53f050ae5-16-768x562.png" class="attachment-medium_large size-medium_large wp-image-47694" alt="DMA測定グラフ" srcset="https://www.ites.co.jp/wp-content/uploads/29d3bc99193cb0b837fb8cc53f050ae5-16-768x562.png 768w, https://www.ites.co.jp/wp-content/uploads/29d3bc99193cb0b837fb8cc53f050ae5-16-300x220.png 300w, https://www.ites.co.jp/wp-content/uploads/29d3bc99193cb0b837fb8cc53f050ae5-16-1024x749.png 1024w, https://www.ites.co.jp/wp-content/uploads/29d3bc99193cb0b837fb8cc53f050ae5-16-1536x1124.png 1536w, https://www.ites.co.jp/wp-content/uploads/29d3bc99193cb0b837fb8cc53f050ae5-16.png 1577w" sizes="(max-width: 768px) 100vw, 768px" />															</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6d21026" data-id="6d21026" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-23b9554 elementor-widget elementor-widget-image" data-id="23b9554" data-element_type="widget" data-e-type="widget" data-widget_type="image.default">
				<div class="elementor-widget-container">
															<img loading="lazy" decoding="async" width="768" height="970" src="https://www.ites.co.jp/wp-content/uploads/cbf5b9f60da99bf791c0aa12a770f429-16-768x970.png" class="attachment-medium_large size-medium_large wp-image-47695" alt="DMA測定" srcset="https://www.ites.co.jp/wp-content/uploads/cbf5b9f60da99bf791c0aa12a770f429-16-768x970.png 768w, https://www.ites.co.jp/wp-content/uploads/cbf5b9f60da99bf791c0aa12a770f429-16-238x300.png 238w, https://www.ites.co.jp/wp-content/uploads/cbf5b9f60da99bf791c0aa12a770f429-16-811x1024.png 811w, https://www.ites.co.jp/wp-content/uploads/cbf5b9f60da99bf791c0aa12a770f429-16.png 914w" sizes="(max-width: 768px) 100vw, 768px" />															</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-3d8f17c elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="3d8f17c" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3dc5116" data-id="3dc5116" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-5f31558 elementor-widget elementor-widget-text-editor" data-id="5f31558" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p>160℃付近でE‘が低下し、E“が上昇する様子が観測され、ガラス転移温度を示すtanδピークトップが156℃に観測されました。</p>								</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-94eee26 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="94eee26" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-691c88c" data-id="691c88c" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-32414b3 elementor-widget elementor-widget-spacer" data-id="32414b3" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-db619e4 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="db619e4" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2dd758c" data-id="2dd758c" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-ec78a1d elementor-widget elementor-widget-heading" data-id="ec78a1d" data-element_type="widget" data-e-type="widget" data-widget_type="heading.default">
				<div class="elementor-widget-container">
					<h2 class="elementor-heading-title elementor-size-default">各測定モードと適した材料及びサイズ</h2>				</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-1bcf760 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="1bcf760" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ec59b18" data-id="ec59b18" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-7f1ae72 elementor-widget elementor-widget-text-editor" data-id="7f1ae72" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p>DMAの変形モードは以下の通りです。サイズを満たせばどのようなモードでの測定も可能ですが、材料の形状や弾性率、測定の目的に応じて最適な条件を選択することが理想的です。</p>								</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-d36b114 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="d36b114" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-be3a77e" data-id="be3a77e" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-d9a3837 elementor-hidden-desktop elementor-hidden-tablet elementor-widget elementor-widget-image" data-id="d9a3837" data-element_type="widget" data-e-type="widget" data-widget_type="image.default">
				<div class="elementor-widget-container">
															<img loading="lazy" decoding="async" width="655" height="227" src="https://www.ites.co.jp/wp-content/uploads/08c4953927d84ede82aade71aa8d34c2.png" class="attachment-medium_large size-medium_large wp-image-47696" alt="" srcset="https://www.ites.co.jp/wp-content/uploads/08c4953927d84ede82aade71aa8d34c2.png 655w, https://www.ites.co.jp/wp-content/uploads/08c4953927d84ede82aade71aa8d34c2-300x104.png 300w" sizes="(max-width: 655px) 100vw, 655px" />															</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-f4eedf8 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="f4eedf8" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-de3b854 elementor-hidden-mobile" data-id="de3b854" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<section class="elementor-section elementor-inner-section elementor-element elementor-element-956bcbf elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="956bcbf" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-8e7b405" data-id="8e7b405" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-01cacf0 elementor-widget elementor-widget-text-editor" data-id="01cacf0" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><strong>変形</strong></span><br /><span style="color: #ffffff;"><strong>モード</strong></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-181039d" data-id="181039d" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-a922063 elementor-widget elementor-widget-text-editor" data-id="a922063" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><strong>引張</strong></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-9f71cb6" data-id="9f71cb6" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-ad6331e elementor-widget elementor-widget-text-editor" data-id="ad6331e" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><b>圧縮</b></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-3c26df8" data-id="3c26df8" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-21c4ec5 elementor-widget elementor-widget-spacer" data-id="21c4ec5" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-1c569b4" data-id="1c569b4" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-a136f7c elementor-widget elementor-widget-text-editor" data-id="a136f7c" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><b>曲げ</b></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-62b0a72" data-id="62b0a72" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-3a18c1e elementor-widget elementor-widget-spacer" data-id="3a18c1e" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-4be5a8a" data-id="4be5a8a" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-1af4dd2 elementor-widget elementor-widget-text-editor" data-id="1af4dd2" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><b>ずり</b></span></p>								</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-inner-section elementor-element elementor-element-f97d35a elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="f97d35a" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-1270391" data-id="1270391" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-d28a730 elementor-widget elementor-widget-spacer" data-id="d28a730" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-acbd3a8" data-id="acbd3a8" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-a7804e5 elementor-widget elementor-widget-spacer" data-id="a7804e5" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-71735d9" data-id="71735d9" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-a2d04b3 elementor-widget elementor-widget-spacer" data-id="a2d04b3" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-e4ee1a7" data-id="e4ee1a7" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-639e882 elementor-widget elementor-widget-text-editor" data-id="639e882" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><b>両持ち</b></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-818a9a2" data-id="818a9a2" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-88079a6 elementor-widget elementor-widget-text-editor" data-id="88079a6" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><strong>片持ち</strong></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-fc80173" data-id="fc80173" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-26f36ff elementor-widget elementor-widget-text-editor" data-id="26f36ff" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
				<div class="elementor-widget-container">
									<p style="text-align: center;"><span style="color: #ffffff;"><b>3</b><b>点</b></span></p>								</div>
				</div>
					</div>
		</div>
				<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-89962be" data-id="89962be" data-element_type="column" data-e-type="column" data-settings="{&quot;background_background&quot;:&quot;classic&quot;}">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-faf0efb elementor-widget elementor-widget-spacer" data-id="faf0efb" data-element_type="widget" data-e-type="widget" data-widget_type="spacer.default">
				<div class="elementor-widget-container">
							<div class="elementor-spacer">
			<div class="elementor-spacer-inner"></div>
		</div>
						</div>
				</div>
					</div>
		</div>
					</div>
		</section>
				<section class="elementor-section elementor-inner-section elementor-element elementor-element-1a40ab9 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="1a40ab9" data-element_type="section" data-e-type="section">
						<div class="elementor-container elementor-column-gap-default">
					<div class="elementor-column elementor-col-14 elementor-inner-column elementor-element elementor-element-2a39c8d" data-id="2a39c8d" data-element_type="column" data-e-type="column">
			<div class="elementor-widget-wrap elementor-element-populated">
						<div class="elementor-element elementor-element-8c937e5 elementor-widget elementor-widget-text-editor" data-id="8c937e5" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
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									<p style="text-align: left;">適用材料<br />（目安）</p>								</div>
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									<p>フィルム<br />樹脂板<br />繊維、ゴム</p>								</div>
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									<p>ゴム<br />（軟質）<br />フォーム</p>								</div>
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									<p>複合材料、<br />樹脂板<br />（低剛性）</p>								</div>
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									<p>複合材料、<br />樹脂板<br />（高剛性）</p>								</div>
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									<p>複合材料、<br />樹脂板<br />（高剛性）</p>								</div>
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									<p>ゴム、樹脂</p>								</div>
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									<p>測定可<br />能形状</p>								</div>
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									<p>長さ:<br />25～55mm<br />厚さ:<br />3～0.001mm<br />最大幅:<br />10mm</p>								</div>
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									<p>最大高さ:<br />15mm<br />最大断面:<br />φ15mm</p>								</div>
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									<p style="text-align: center;">長さ:50±2mm<br />最大厚さ:5mm<br />最大幅:16mm</p>								</div>
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						<div class="elementor-element elementor-element-e48e444 elementor-widget elementor-widget-text-editor" data-id="e48e444" data-element_type="widget" data-e-type="widget" data-widget_type="text-editor.default">
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									<p>長さ:<br />55,50,45mm<br />最大厚さ:<br />5mm<br />最大幅:<br />16mm</p>								</div>
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									<p>断面形状:<br />10x10mm<br />最大厚さ:<br />6mm</p>								</div>
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									<p><span style="color: #0000ff;"><strong><span style="font-size: 14pt;">DMAによる動的粘弾性測定は測定対象や目的に応じて最適な変形モードを選択する</span></strong></span><span style="color: #0000ff;"><strong><span style="font-size: 14pt;">必要があります。材料の種類、形状、使用目的から最適な変形モードを提案いたします。</span></strong></span><br><span style="color: #0000ff;"><strong><span style="font-size: 14pt;">動的粘弾性を測定したい対象がございましたら、ご相談ください。</span></strong></span></p>								</div>
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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/cfrp.html">CFRPの動的粘弾性測定</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></content:encoded>
					
		
		
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		<title>ポリウレタンゴムの動的粘弾性測定</title>
		<link>https://www.ites.co.jp/chemistry/index/thermal-analysis/viscoelasticity-measurement.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Fri, 25 Aug 2023 07:12:38 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=41409</guid>

					<description><![CDATA[<p>DMAは高分子材料に周期的な振動荷重を与え、生じる応力と位相差から、弾性や粘性を温度の関数として測定する分析です。荷重の与え方としては、引張、圧縮、両持ち梁曲げ、自由支持3点曲げ、せん断（ずり）があり、材料の形状、用途に... </p>
<div class="textAR"><a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/viscoelasticity-measurement.html" class="morelink">続きを読む→</a></div>
The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/viscoelasticity-measurement.html">ポリウレタンゴムの動的粘弾性測定</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></description>
										<content:encoded><![CDATA[<div data-elementor-type="wp-post" data-elementor-id="41409" class="elementor elementor-41409" data-elementor-post-type="chemistry">
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									<p>DMAは高分子材料に周期的な振動荷重を与え、生じる応力と位相差から、弾性や粘性を温度の関数として測定する分析です。荷重の与え方としては、引張、圧縮、両持ち梁曲げ、自由支持3点曲げ、せん断（ずり）があり、材料の形状、用途に応じて適切なものを選択し、測定を行います。今回は円柱状のポリウレタンゴムの圧縮モードでの測定事例を紹介します。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">DMA測定概要　</h2>				</div>
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									<p>図1のように、試料を設置し、周期的な振動荷重を与え、温度を変化させながら、応力と変位量を計測し、貯蔵弾性率E’、損失弾性率E”を計測します。E”/E’の比が損失正接（tanδ）となり、振動の吸収性を反映したバロメーターとなります。今回は円柱状のゴム試料を用いて、圧縮モードで測定を行いました。</p>								</div>
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															<img loading="lazy" decoding="async" width="698" height="551" src="https://www.ites.co.jp/wp-content/uploads/画像1-17.png" class="attachment-medium_large size-medium_large wp-image-41414" alt="装置" srcset="https://www.ites.co.jp/wp-content/uploads/画像1-17.png 698w, https://www.ites.co.jp/wp-content/uploads/画像1-17-300x237.png 300w" sizes="(max-width: 698px) 100vw, 698px" />															</div>
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									<p>貯蔵弾性率(E‘) ： 弾性特性を反映</p><p>損失弾性率(E’’)： 粘性特性を反映</p><p>損失正接<br />(tanδ=E’‘/E’)：振動吸収性を反映</p>								</div>
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															<img loading="lazy" decoding="async" width="112" height="149" src="https://www.ites.co.jp/wp-content/uploads/スクリーンショット-2023-08-24-155746.png" class="attachment-medium_large size-medium_large wp-image-41421" alt="" />															</div>
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									<p style="text-align: center">図1　装置、試料設置の概略図（圧縮モード）、及び試料写真</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">ポリウレタンゴムの圧縮モードでの測定結果</h2>				</div>
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									<p>直径15mm、厚さ6mmの70°ポリウレタンゴムに1Hzの周期で振動荷重を与えながら、-80℃～80℃まで変化させ、DMA測定を行いました。E’、E”、tan δの温度分散曲線を図2、図3に示します。</p><p>Tan δの温度分散曲線より、-15.7℃にガラス転移温度を有していることを示しています。</p>								</div>
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															<img loading="lazy" decoding="async" width="289" height="195" src="https://www.ites.co.jp/wp-content/uploads/スクリーンショット-2023-08-24-155801.png" class="attachment-medium_large size-medium_large wp-image-41422" alt="図2　E’、E”の温度分散曲線" />															</div>
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															<img loading="lazy" decoding="async" width="273" height="191" src="https://www.ites.co.jp/wp-content/uploads/スクリーンショット-2023-08-24-155810.png" class="attachment-medium_large size-medium_large wp-image-41423" alt="" />															</div>
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					<h2 class="elementor-heading-title elementor-size-default">時間―温度換算則によるマスターカーブの作成</h2>				</div>
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									<p>温度分散曲線を0.1Hz、0.2Hz、0.5Hz、1Hz、10Hzで測定し、時間－温度換算則を用いて、70°ポリウレタンゴムのマスターカーブを作成しました（図4～6）。</p>								</div>
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															<img loading="lazy" decoding="async" width="260" height="193" src="https://www.ites.co.jp/wp-content/uploads/スクリーンショット-2023-08-24-155829.png" class="attachment-medium_large size-medium_large wp-image-41424" alt="" />															</div>
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															<img loading="lazy" decoding="async" width="250" height="186" src="https://www.ites.co.jp/wp-content/uploads/スクリーンショット-2023-08-24-155842.png" class="attachment-medium_large size-medium_large wp-image-41425" alt="図5　マスターカーブ(E”)" />															</div>
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															<img loading="lazy" decoding="async" width="242" height="190" src="https://www.ites.co.jp/wp-content/uploads/スクリーンショット-2023-08-24-155851.png" class="attachment-medium_large size-medium_large wp-image-41426" alt="図6　マスターカーブ(tan δ)" />															</div>
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									<p>今回紹介した圧縮モード以外の引張、せん断、曲げモードにおいても、同様にマスターカーブの作成が可能です。</p>								</div>
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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/thermal-analysis/viscoelasticity-measurement.html">ポリウレタンゴムの動的粘弾性測定</a> first appeared on <a href="https://www.ites.co.jp">株式会社アイテス</a>.]]></content:encoded>
					
		
		
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