Comparative study of methyl position effect in poly (methyl) cyclohexyl methacrylates by TSDC and TW

被引：0
|
作者：
Espinosa, GD [1 ]
Sanchis, MJ [1 ]
Díaz-Calleja, R [1 ]
Pagueguy, C [1 ]
Gargallo, L [1 ]
Radic, D [1 ]
机构：
[1] Univ Politecn Valencia, Dept Termodinam Aplicada, ETSII, E-46071 Valencia, Spain
来源：
PROCEEDINGS OF THE 2004 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS, VOLS 1 AND 2 | 2004年
关键词：
D O I：
10.1109/ICSD.2004.1350297
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A comparative study of the effect of the position of the methyl group in the cyclohexyl ring in poly (2-methy) cyclohexyl methacrylate (P2MCHM), poly (3-methyl) cyclohexyl methacrylate (P3MCHM) and poly(4-methyl) cyclohexyl methacrylate (P4MCHM) has been carried out by thermally stimulated depolarization currents (TSDC), and thermal windows (TW) measurements. In the TSDC global spectra we appreciate the evolution of the subglass and glass transition absorptions as a function of the position of the methyl group. For each sample fractional polarization is used to describe the fine structure of these complex spectra. By fitting the experimental data to standard models, the kinetic parameters of the relaxations observed have been evaluated. In the glassy state, the complex dielectric permittivity in the frequency domain was calculated at several temperatures from elementary-peaks obtained by partial TSDC curves.
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页码：91 / 94
页数：4
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