CALORIMETRIC AND MICROWAVE DIELECTRIC MONITORING OF EPOXY-RESIN CURE

被引：49

作者：

CARROZZINO, S ^{[1
]}

LEVITA, G ^{[1
]}

ROLLA, P ^{[1
]}

TOMBARI, E ^{[1
]}

机构：

[1] DEPT PHYS,I-56100 PISA,ITALY

来源：

POLYMER ENGINEERING AND SCIENCE | 1990年 / 30卷 / 06期

关键词：

D O I：

10.1002/pen.760300608

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The cure process of a BADGE (diglycidyl ether of bisphenol‐A) resin (Epon 828) and ethylenediamine has been investigated by means of calorimetry and dielectrometry in the microwave region (107–1010 Hz) in the temperature range 50 to 70°C. Kinetic data from calorimetry were analyzed in detail. An overall kinetic order of 2.5 has been obtained. The time domain reflectometry (TDR) has been used to characterize pure components and their mixtures. Cure monitoring was carried out with both TDR and a cavity method at fixed frequency (9.5 × 109 Hz). A very good agreement was obtained between the reaction rate as measured by calorimetry and the rate of decrease of dielectric constants up to very high conversion. This was explained by admitting that the rates of disappearance of dielectric dipoles and of reactive species coincided. Copyright © 1990 Society of Plastics Engineers

引用

页码：366 / 373

页数：8

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