Reaction-induced phase separation in rubber-modified epoxy resin

被引：0
|
作者：
Jianwen Zhang
Hongdong Zhang
Dong Yan
Hongwei Zhou
Yuliang Yang
机构：
[1] Fudan Uni.versity,Institute of Macromolecular Science
[2] Laboratory of Molecular Engineering of Polymers,Institute of Chemistry
[3] State Education Commission,undefined
[4] Chinese Academy of Sciences,undefined
来源：
Science in China Series B: Chemistry | 1997年 / 40卷
关键词：
polymerization-induced phase separation; rubber toughened epoxy resin; light scattering; curing kinetics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The phase separation mechanism- and structure development during curing of epoxy with a novel liquid rubber-ZR were investigated by time-resolved light scattering, optical microscope and differential scanning calorimetry (DSC). The mixture loaded with curing agent was a single-phase system in the early stage of curing. When the cure reaction proceeded, phase separation took place via the spinodal decomposition induced by polymerization of epoxy resin. This was supported by the characteristic change of light scattering profile with curing time. Cure reaction plays an important role in the progress of phase separation. The bigger the cure reaction rate is, the longer periodic distance will be. The overall two-phase structure was basically locked in when the conversion approached 80% estimated by DSC, and finally the co-continuous two-phase structure was successfully obtained.
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页码：15 / 23
页数：8
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