DIELECTRIC-PROPERTIES OF A CURING EPOXY AMINE SYSTEM AT MICROWAVE-FREQUENCIES

被引：13

作者：

FINZEL, MC ^{[1
]}

HAWLEY, MC ^{[1
]}

JOW, J ^{[1
]}

机构：

[1] UNION CARBIDE CORP,SOMERSET,NJ

来源：

POLYMER ENGINEERING AND SCIENCE | 1991年 / 31卷 / 16期

关键词：

D O I：

10.1002/pen.760311614

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dielectric data collected at 2.45 x 10(9) Hz has been analyzed using a mean relaxation time model over the temperature range 50 to 100-degrees-C and at extents of cure from 0 to 57% for a stoichiometric DER 332 (Dow)/DDS (Aldrich) mixture. The relaxation times thus obtained obey the Arrhenius law and tend to increase with the extent of cure. This corresponds to the more rigid nature of the molecular structure as the network forms and the dipolar relaxations become more inhibited. Decreases in the activation energy of the relaxation along with a widening of the relaxation time distribution imply that the relaxations involve ever shorter chain segments as the extent of cure increases.

引用

页码：1240 / 1244

页数：5

共 14 条

[1] Dispersion and absorption in dielectrics I. Alternating current characteristics [J].