Determining the glass transition temperature of polymer films with real-time

被引：1

作者：

Yang, Yanfang ^{[1
]}

Xu, Kai ^{[1
]}

He, Ying ^{[1
]}

Li, Chunfang ^{[1
,2
]}

机构：

[1] Department of Physics, College of Sciences, Shanghai University

[2] State Key Laboratory of Transient Optics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2009年 / 36卷 / 11期

关键词：

Glass transition temperature; Optics waveguide; Polymer; Refractive index; Thermal expansion;

D O I：

10.3788/CJL20093611.3007

中图分类号：

学科分类号：

摘要：

According to thermal expansion principle, a novel real-time method is proposed in this paper for determining the glass transition temperature (Tg) of thin polymer films based on the attenuated total reflection technique. The method is that the changing values of the refractive index and the thickness of the polymer film can be determined with the ascending temperature using the real-time system. Experimental results definitely show that curves of temperature dependence of the thermal expansion coefficient (β) and the refractive index (dn/dT) change discontinuously and exist a same intersection point. The temperature of intersection point is the polymeric Tg. With host-guest DR1/PMMA, the measurement procedures and experimental results are given. The repeatability and reliability of measuring Tg of polymer by this method are examined.

引用

页码：3007 / 3010

页数：3

共 20 条

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