Dielectric relaxation spectroscopy of poly(ethylene terephthalate)

被引：9
|
作者：
Pratt, GJ [1 ]
Smith, MJ [1 ]
机构：
[1] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
来源：
POLYMER INTERNATIONAL | 2002年 / 51卷 / 01期
关键词：
dielectric spectroscopy; crystallinity; poly(ethylene terephthalate); relaxation processes; asymmetry; constrained amorphous phase;
D O I：
10.1002/pi.785
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Contour maps of dielectric loss tangent within the ranges 0.1Hz to 3MHz and -175degreesC to +190degreesC are presented for a commercial poly(ethylene terephthalate) (PET) in two initial states of crystallinity. Individual absorption regions resemble those for poly(butylene terephthalate) and are attributed to carbonyl-driven alpha- and beta-relaxation processes and to Maxwell-Wagner-Sillars polarizations. Possible causes are considered for the asymmetry and structure apparent in the alpha-peak of partially crystalline PET. (C) 2001 Society of Chemical Industry.
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页码：21 / 26
页数：6
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