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		<title>ラミネートフィルムの複屈折測定</title>
		<link>https://www.ites.co.jp/chemistry/index/component_analysis/laminate-film_birefringence-measurement.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Tue, 11 Oct 2022 08:05:47 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=38709</guid>

					<description><![CDATA[<p>ラミネートフィルムは透明性の高い材料を用いることで、印刷物の視認性を保持しつつ、その表示面を保護する目的で様々な業界で使用される。加工の際は、熱圧着を行うので、分子の状態は加工前に比べて変化していることが想定される。今回... </p>
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The post <a href="https://www.ites.co.jp/chemistry/index/component_analysis/laminate-film_birefringence-measurement.html">ラミネートフィルムの複屈折測定</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><span style="color: #000000">ラミネートフィルムは透明性の高い材料を用いることで、印刷物の視認性を保持しつつ、その表示面を保</span><span style="font-size: 15px">護する目的で様々な業界で使用される。加工の際は、熱圧着を行うので、分子の状態は加工前に比べて変</span><span style="font-size: 15px">化していることが想定される。今回は、ラミネートフィルムに対して、熱を加えた条件と加えていない条</span><span style="font-size: 15px">件を比較して、製品に残留する応力を複屈折から明らかにすることを試みた。例として、ポリエチレンテ</span><span style="font-size: 15px">レフタレート(PET)とエチレン酢酸ビニル（EVA)で構成されたラミネートフィルムを用いた測定結果を</span><span style="font-size: 15px">紹介する。</span></p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">DSCによるガラス転移点測定　</h2>				</div>
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															<img fetchpriority="high" decoding="async" width="768" height="409" src="https://www.ites.co.jp/wp-content/uploads/画像1-7-768x409.png" class="attachment-medium_large size-medium_large wp-image-38714" alt="ガラス転移点測定" srcset="https://www.ites.co.jp/wp-content/uploads/画像1-7-768x409.png 768w, https://www.ites.co.jp/wp-content/uploads/画像1-7-300x160.png 300w, https://www.ites.co.jp/wp-content/uploads/画像1-7-1024x545.png 1024w, https://www.ites.co.jp/wp-content/uploads/画像1-7.png 1188w" sizes="(max-width: 768px) 100vw, 768px" />															</div>
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									<p>DSC測定は、試料の物性値（ガラス転移点、融点など）が把握できる熱分析手法の一種である。</p><p> </p><p>測定結果の各点線はガラス転移点（Tg）を示しており、この値は成形品の残留応力を緩和するためのアニール温度の基準値となる。この結果からEVAのTg以上かつPETのTg以下の60℃をアニール温度に設定した。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">WPAによる複屈折測定　</h2>				</div>
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									<p>      位相差(nm)　　　　            サンプル膜厚：PET層（約50um）、EVA層（約35um)</p>								</div>
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															<img decoding="async" width="800" height="448" src="https://www.ites.co.jp/wp-content/uploads/wpa-1024x573.png" class="attachment-large size-large wp-image-38754" alt="" srcset="https://www.ites.co.jp/wp-content/uploads/wpa-1024x573.png 1024w, https://www.ites.co.jp/wp-content/uploads/wpa-300x168.png 300w, https://www.ites.co.jp/wp-content/uploads/wpa-768x430.png 768w, https://www.ites.co.jp/wp-content/uploads/wpa-1536x860.png 1536w, https://www.ites.co.jp/wp-content/uploads/wpa-2048x1147.png 2048w" sizes="(max-width: 800px) 100vw, 800px" />															</div>
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									<p>熱処理を加えることで、PETの位相差が500nm以上の減少を確認した。Tg以下でもPETの残留応力は緩和(応力緩和)していることがわかる。</p>								</div>
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									<p>熱処理を加えることで、PET+EVAの位相差が200nm以上の減少を確認した。PETの応力緩和はTg以下で生じていたので、Tg以上で処理したEVAにも応力緩和が起こっていると推定される。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">PETとEVAを複合させることによる効果</h2>				</div>
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															<img decoding="async" width="470" height="350" src="https://www.ites.co.jp/wp-content/uploads/pet_eva1.png" class="attachment-large size-large wp-image-38755" alt="" srcset="https://www.ites.co.jp/wp-content/uploads/pet_eva1.png 470w, https://www.ites.co.jp/wp-content/uploads/pet_eva1-300x223.png 300w" sizes="(max-width: 470px) 100vw, 470px" />															</div>
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									<p>PETは正の複屈折、EVAは負の複屈折の特徴を持つ。これらを複合体とすることで、 EVAはラミネートフィルムの低複屈折化に少なからず寄与し、印刷物の視認性を保持していると推定される。</p>								</div>
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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/component_analysis/laminate-film_birefringence-measurement.html">ラミネートフィルムの複屈折測定</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>プラスチック成形品の歪、複屈折評価</title>
		<link>https://www.ites.co.jp/chemistry/index/component_analysis/plastic_hizumi.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Fri, 29 Oct 2021 03:00:46 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=32448</guid>

					<description><![CDATA[<p>射出成形法によるプラスチック成形品は樹脂の溶融、金型への充填、冷却・保圧といった工程を経ていますが、これらの条件が適切でない場合、内部に応力が残り（残留応力）、成形不良の原因となります。<br />
二次元複屈折測定システムは、その応力の指標である複屈折位相差(歪)や流れ方向・応力方向(主軸方位)の視覚化が可能です。例として、ポリスチレン（PS）成形品を加熱条件で比較した複屈折評価をご紹介します。... </p>
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The post <a href="https://www.ites.co.jp/chemistry/index/component_analysis/plastic_hizumi.html">プラスチック成形品の歪、複屈折評価</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>射出成形法によるプラスチック成形品は樹脂の溶融、金型への充填、冷却・保圧といった工程を経ていますが、<br />これらの条件が適切でない場合、内部に応力が残り（残留応力）、成形不良の原因となります。</p><p>二次元複屈折測定システムは、その応力の指標である複屈折位相差(歪)や流れ方向・応力方向(主軸方位)の視覚化が可能です。例として、ポリスチレン（PS）成形品を加熱条件で比較した複屈折評価をご紹介します。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">装置原理（二次元複屈折測定システム）</h2>				</div>
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															<img loading="lazy" decoding="async" width="300" height="215" src="https://www.ites.co.jp/wp-content/uploads/SYSTEM-300x215.png" class="attachment-medium size-medium wp-image-32472" alt="二次元複屈折測定システム" srcset="https://www.ites.co.jp/wp-content/uploads/SYSTEM-300x215.png 300w, https://www.ites.co.jp/wp-content/uploads/SYSTEM.png 464w" sizes="(max-width: 300px) 100vw, 300px" />															</div>
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									<p>複屈折を持つ透明体に光を当てると、その偏光状態が変化する性質がある。</p><p>左図の複屈折測定装置を使用することで、偏光情報を専用の偏光イメージセンサで視覚化することが可能となる。</p><p>本装置では523nm・543nm・575nmの波長を使用して、透明体を通過する前後の偏光状態を比較することで、複屈折を評価することができる。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">評価サンプル</h2>				</div>
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					<p class="elementor-heading-title elementor-size-default">PS製シャーレ（射出成形法で製造）
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															<img loading="lazy" decoding="async" width="300" height="151" src="https://www.ites.co.jp/wp-content/uploads/dish-300x151.jpg" class="attachment-medium size-medium wp-image-32470" alt="シャーレ" srcset="https://www.ites.co.jp/wp-content/uploads/dish-300x151.jpg 300w, https://www.ites.co.jp/wp-content/uploads/dish.jpg 446w" sizes="(max-width: 300px) 100vw, 300px" />															</div>
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					<p class="elementor-heading-title elementor-size-default">未処理　　　　　90℃×2h
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															<img loading="lazy" decoding="async" width="258" height="201" src="https://www.ites.co.jp/wp-content/uploads/PS-1.png" class="attachment-medium size-medium wp-image-32471" alt="PS構造" />															</div>
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					<p class="elementor-heading-title elementor-size-default">PS構造

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									<p>射出成形法で成形されたPS製シャーレを用いて、ガラス転移温度付近で加熱を実施した。</p><p>PSは側鎖に大きい分極率を持つベンゼン環があるので、樹脂の配向方向の屈折率(α1)に対して垂直方向の屈折率(α2)が大きい性質を持つ。</p>								</div>
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					<h2 class="elementor-heading-title elementor-size-default">測定データ（絶対値　主軸方位）</h2>				</div>
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									<p>複屈折位相差をグラデーションで表示している。<br />ゲート付近はせん断速度が速く、せん断応力が増大。<br />加熱条件では残留応力が緩和されて、複屈折位相差が小さくなっている。</p>								</div>
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					<p class="elementor-heading-title elementor-size-default">絶対値</p>				</div>
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															<img loading="lazy" decoding="async" width="269" height="259" src="https://www.ites.co.jp/wp-content/uploads/zettaichi_90℃x2h.jpg" class="attachment-medium size-medium wp-image-32462" alt="90℃×2h" />															</div>
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					<p class="elementor-heading-title elementor-size-default">90℃×２ｈ

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															<img loading="lazy" decoding="async" width="70" height="105" src="https://www.ites.co.jp/wp-content/uploads/scale.png" class="attachment-medium size-medium wp-image-32463" alt="スケール" />															</div>
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									軸方位角度をグラデーションで表示している。
加熱することで、若干ではあるが、赤味と緑味が濃くなり、配向性が変わっている。								</div>
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															<img loading="lazy" decoding="async" width="162" height="121" src="https://www.ites.co.jp/wp-content/uploads/scale2.png" class="attachment-medium size-medium wp-image-32464" alt="スケール" />															</div>
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															<img loading="lazy" decoding="async" width="269" height="265" src="https://www.ites.co.jp/wp-content/uploads/syujikuhoui_misyori.jpg" class="attachment-medium size-medium wp-image-32465" alt="未処理" />															</div>
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					<p class="elementor-heading-title elementor-size-default">未処理
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															<img loading="lazy" decoding="async" width="276" height="263" src="https://www.ites.co.jp/wp-content/uploads/syujikuhoui_90℃x2h.jpg" class="attachment-medium size-medium wp-image-32466" alt="90℃×２ｈ" />															</div>
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					<p class="elementor-heading-title elementor-size-default">90℃×２ｈ

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									<p>複屈折位相差をグラフで表示。加熱条件の方が位相差が小さくなっていることがわかる。</p>								</div>
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					<p class="elementor-heading-title elementor-size-default">測定方向
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															<img loading="lazy" decoding="async" width="300" height="154" src="https://www.ites.co.jp/wp-content/uploads/misyori-300x154.png" class="attachment-medium size-medium wp-image-32453" alt="未処理" srcset="https://www.ites.co.jp/wp-content/uploads/misyori-300x154.png 300w, https://www.ites.co.jp/wp-content/uploads/misyori.png 521w" sizes="(max-width: 300px) 100vw, 300px" />															</div>
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					<p class="elementor-heading-title elementor-size-default">未処理
</p>				</div>
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															<img loading="lazy" decoding="async" width="300" height="159" src="https://www.ites.co.jp/wp-content/uploads/90x2h-300x159.png" class="attachment-medium size-medium wp-image-32454" alt="90℃×2ｈ" srcset="https://www.ites.co.jp/wp-content/uploads/90x2h-300x159.png 300w, https://www.ites.co.jp/wp-content/uploads/90x2h.png 513w" sizes="(max-width: 300px) 100vw, 300px" />															</div>
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					<p class="elementor-heading-title elementor-size-default">90℃×2ｈ

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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/component_analysis/plastic_hizumi.html">プラスチック成形品の歪、複屈折評価</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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		<item>
		<title>WPAによる製品/素材の歪、複屈折評価</title>
		<link>https://www.ites.co.jp/chemistry/index/component_analysis/wpa.html</link>
		
		<dc:creator><![CDATA[fujiko3_staff]]></dc:creator>
		<pubDate>Tue, 19 Oct 2021 03:00:50 +0000</pubDate>
				<guid isPermaLink="false">https://www.ites.co.jp/?post_type=chemistry&#038;p=32216</guid>

					<description><![CDATA[<p>製品を構成する材料は様々ですが、製造成形プロセスにおいて内部応力が大きく、または偏って存在すると、使用中、使用環境により変形、割れ（クラック）、特性低下などの不具合を招きます。WPA（広範囲偏光分析） により、素材の配向... </p>
<div class="textAR"><a href="https://www.ites.co.jp/chemistry/index/component_analysis/wpa.html" class="morelink">続きを読む→</a></div>
The post <a href="https://www.ites.co.jp/chemistry/index/component_analysis/wpa.html">WPAによる製品/素材の歪、複屈折評価</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="32216" class="elementor elementor-32216" data-elementor-post-type="chemistry">
						<section class="elementor-section elementor-top-section elementor-element elementor-element-0e0ce26 elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="0e0ce26" data-element_type="section" data-e-type="section">
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									<p>製品を構成する材料は様々ですが、製造成形プロセスにおいて内部応力が大きく、または偏って存在すると、使用中、使用環境により変形、割れ（クラック）、特性低下などの不具合を招きます。WPA（広範囲偏光分析）<br />により、素材の配向、歪、複屈折を評価することで、内部応力、歪状態を把握することが可能となります。</p>								</div>
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				<div class="elementor-widget-container">
					<h2 class="elementor-heading-title elementor-size-default">評価サンプル　光拡散フィルムに関して</h2>				</div>
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									<p>光拡散フィルム／シートは、主にLCD（液晶ディスプレイ）やアートデザイン等に使用されるが、配向の不均一、歪、複屈折率の高い素材など、製造プロセス条件や選定材料により不具合発生率に影響することがあります。<br />今回の評価では、恒温恒湿試験70℃85％の負荷前後で比較評価しました。</p>								</div>
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				<section class="elementor-section elementor-inner-section elementor-element elementor-element-ac7e5ab elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="ac7e5ab" data-element_type="section" data-e-type="section">
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															<img loading="lazy" decoding="async" width="768" height="222" src="https://www.ites.co.jp/wp-content/uploads/Light-diffusion-film-768x222.jpg" class="attachment-medium_large size-medium_large wp-image-32230" alt="光拡散フィルム" srcset="https://www.ites.co.jp/wp-content/uploads/Light-diffusion-film-768x222.jpg 768w, https://www.ites.co.jp/wp-content/uploads/Light-diffusion-film-300x87.jpg 300w, https://www.ites.co.jp/wp-content/uploads/Light-diffusion-film.jpg 972w" sizes="(max-width: 768px) 100vw, 768px" />															</div>
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						<div class="elementor-element elementor-element-b7b5897 elementor-widget elementor-widget-image" data-id="b7b5897" data-element_type="widget" data-e-type="widget" data-widget_type="image.default">
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															<img loading="lazy" decoding="async" width="341" height="256" src="https://www.ites.co.jp/wp-content/uploads/kouonkousitsusikensouchi.jpg" class="attachment-large size-large wp-image-32229" alt="恒温恒湿試験装置" srcset="https://www.ites.co.jp/wp-content/uploads/kouonkousitsusikensouchi.jpg 341w, https://www.ites.co.jp/wp-content/uploads/kouonkousitsusikensouchi-300x225.jpg 300w" sizes="(max-width: 341px) 100vw, 341px" />															</div>
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					<p class="elementor-heading-title elementor-size-default">恒温恒湿試験装置</p>				</div>
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		</section>
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		</section>
				<section class="elementor-section elementor-top-section elementor-element elementor-element-34a77ba elementor-section-boxed elementor-section-height-default elementor-section-height-default" data-id="34a77ba" data-element_type="section" data-e-type="section">
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					<h2 class="elementor-heading-title elementor-size-default">恒温恒湿負荷試験前後　位相差画像比較</h2>				</div>
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					<div class="elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-c8f7646" data-id="c8f7646" data-element_type="column" data-e-type="column">
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						<div class="elementor-element elementor-element-be16274 elementor-widget elementor-widget-image" data-id="be16274" data-element_type="widget" data-e-type="widget" data-widget_type="image.default">
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															<img loading="lazy" decoding="async" width="749" height="284" src="https://www.ites.co.jp/wp-content/uploads/absolute-value_before-after.png" class="attachment-medium_large size-medium_large wp-image-32234" alt="絶対値 試験前後" srcset="https://www.ites.co.jp/wp-content/uploads/absolute-value_before-after.png 749w, https://www.ites.co.jp/wp-content/uploads/absolute-value_before-after-300x114.png 300w" sizes="(max-width: 749px) 100vw, 749px" />															</div>
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					<p class="elementor-heading-title elementor-size-default">絶対値
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									<p>試験前の約2220nmの位相差（歪）に対し、試験後は約1690nmに減少している。</p>								</div>
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															<img loading="lazy" decoding="async" width="639" height="280" src="https://www.ites.co.jp/wp-content/uploads/Axis-orientation_before-after.png" class="attachment-medium_large size-medium_large wp-image-32235" alt="" srcset="https://www.ites.co.jp/wp-content/uploads/Axis-orientation_before-after.png 639w, https://www.ites.co.jp/wp-content/uploads/Axis-orientation_before-after-300x131.png 300w" sizes="(max-width: 639px) 100vw, 639px" />															</div>
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					<p class="elementor-heading-title elementor-size-default">軸方位</p>				</div>
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									<p>試験前の約160°/‐20°に対し、試験後は約120°/‐60°に大きく方位が変化している。</p>								</div>
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									<ul><li>恒温恒湿試験前後で、素材のコンホメーションと軸方向が変化し、熱による緩和で歪が解消しています。</li><li>材料はアクリルであるが、分子構造から異方性があり側鎖の分極で負の異方性となります。その一方、温度湿度ではその異方性がランダムとなり、歪の解消と異方性異方ベクトル合成を小さくしています。<br />Δα＝主鎖分極ー側鎖分極　（主鎖分極＜側鎖分極）</li></ul>								</div>
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									<p><span style="color: #0000ff">アイテスでは、材料の歪、複屈折の評価を分子の視点で解明いたします。</span><br /><span style="color: #0000ff">ラマン分光（定性/歪/結晶性）、XRD（X線回折）、AFM/SEM/TEM（結晶構造観察）、DSC（結晶化度）など、複数の手法でマトリックスに解析し、不具合、理論を解明いたします。</span></p><p style="text-align: center"><span style="color: #ff0000">お気軽に、ご相談ください！</span></p>								</div>
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				</div>The post <a href="https://www.ites.co.jp/chemistry/index/component_analysis/wpa.html">WPAによる製品/素材の歪、複屈折評価</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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