Real time optical and mechano-optical studies during drying and uniaxial stretching of Polyetherimide films from solution
Real time optical and mechano-optical studies during drying and uniaxial stretching of Polyetherimide films from solution
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DOI：
10.1016/j.polymer.2015.05.011
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发表时间：
2015-06-26
期刊：
影响因子：
4.6
通讯作者：
Cakmak, Miko
中科院分区：
文献类型：
--
作者：
Jiang, Fanhui;Cakmak, Miko
为了对聚醚酰亚胺（PEI）薄膜的物理特性和工艺参数的时间演变有一个基本的了解，真实的时间测量是必不可少的。由于溶剂流延聚合物薄膜的干燥和拉伸过程是复杂的，离线测量无法揭示随时间变化的详细信息，特别是对于快速的“瞬态事件”。为了解决该问题，使用两个测量系统，一个用于跟踪溶液浇铸膜的真实的时间厚度、重量、表面温度、面内和面外双折射的干燥系统，以及另一个用于跟踪拉伸膜的真实的时间真实应力、真实应变和双折射的单轴拉伸系统。通过使用这些系统，我们能够系统地调查光学各向异性的发展，通过在和出平面双折射监测干燥的溶液浇铸膜和它们的机械光学行为在拉伸过程中，并量化溶剂N-甲基-2-吡咯烷酮（NMP）对这些关系的影响。(C)2015爱思唯尔有限公司版权所有。
In order to have a fundamental understanding of the temporal evolution of physical characteristics of Polyetherimide (PEI) film and processing parameters, real time measurements are essential. Because drying and stretching processes of solvent-cast polymer film are complex, off line measurements are unable to reveal the temporally varying detailed information, especially for fast "transient events". To solve the problem, two measurement systems, one for drying that tracks real time thickness, weight, surface temperature, in-plane and out-of-plane birefringence of solution casting film, and another for uniaxial stretching that tracks real time true stress, true strain and birefringence of stretched film are used. By using these systems, we are able to systematic investigate the development of optical anisotropy through in and out of plane birefringence monitoring drying of solution cast films and their mechano-optical behavior during stretching, and quantify the influence of solvent N-methyl-2-pyrrolidinone (NMP) on these relationships. (C) 2015 Elsevier Ltd. All rights reserved.