Dielectric properties of PET below its glass transition temperature

被引：7
作者：
Pop, T [1 ]
Iordache, D [1 ]
Jonas, A [1 ]
机构：
[1] POLITEHN UNIV BUCHAREST,DEPT PHYS,BUCHAREST,ROMANIA
来源：
MICROELECTRONIC ENGINEERING | 1997年 / 33卷 / 1-4期
关键词：
dielectric spectroscopy; poly(ethylene terephthalate) (PET); beta relaxation;
D O I：
10.1016/S0167-9317(96)00068-8
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Dielectric relaxation measurements on poly(ethylene terephthalate) (PET) samples of different microstructures (semicrystalline, amorphous, amorphous oriented), between 80 and 300 K for frequencies ranging from 10(2) to 10(5) Hz have been performed. The data pertaining to the beta relaxation of PET could be fitted to the Cole-Cole (CC) phenomenological equations, from which the relaxation strength, the average activation energies, and the temperature-dependent distribution functions of relaxation times were obtained. On the basis of these results, we discuss briefly the origin of the beta relaxation and the degree of cooperativity of the beta motions.
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页码：377 / 384
页数：8
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