DIELECTRIC-RELAXATION DURING PHYSICAL AGING

被引：78

作者：

SCHLOSSER, E

SCHONHALS, A

机构：

[1] Central Institute of Organic Chemistry, O- 1199 Berlin

来源：

POLYMER | 1991年 / 32卷 / 12期

关键词：

DIELECTRIC RELAXATION; HAVRILIAK-NEGAMI FUNCTION; POLY(VINYL ACETATE); GLASS TRANSITION; PHYSICAL AGING; SEQUENTIAL RELAXATION;

D O I：

10.1016/0032-3861(91)90036-I

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Isothermal dielectric measurements (frequency range 5 x 10(-5)-10(5) Hz) have been carried out on poly(vinyl acetate) above and below the glass transition temperature T(g) (from T(g) + 50 to T(g) - 15 K) using frequency and time domain measurements. The temperature dependence of such characteristic parameters of the relaxation function as intensity, position, half-width and asymmetry is reported. Near and below the T(g) the parameters deviate more from their equilibrium values the lower the temperature. A dramatic change in asymmetry is observed. The deviation of the parameters reflects the influence of physical ageing which can be interpreted according to the concept of sequential relaxation.

引用

页码：2135 / 2140

页数：6

共 23 条

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