Temporal evolution of structure in uniaxially stretched PET/PEI blends during constrained annealing: A real time birefringence study
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- 作者：J. Choi ; T. Serhatkulu ; M. Cakmak ; cakmak@uakron.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Poly (ethylene terephthalate) ; Poly (ether imide) ; Heat-setting
- 刊名：Polymer
- 出版年：2016
- 出版时间：5 August 2016
- 年：2016
- 卷：97
- 期：Complete
- 页码：569-579
- 全文大小：4066 K
文摘
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Rapid structural changes during heat setting of stretched PET/PEI films were tracked using spectral birefringence system.
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At low PEI concentrations the crystallization is dominant in early stages of heat setting.
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Beyond 30% PEI, crystallization is suppressed and relaxation become dominant at early stages of heat setting.
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The presence of PEI disrupts the alignment of (100) planes parallel to the film surface.