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High Performance Polymers
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Article

Influence of the Ratio of Epoxy/cyanate Ester on the Curing Behavior of Epoxy/dicyclopentadiene Bisphenol Cyanate Ester System

Jin-He Wang, Guozheng Liang*, Hong-Xia Yan, Shao-Bo He, and Lian-li Yang

Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China

* To whom correspondence should be addressed.


  Abstract

The influence of the ratio of epoxy (EP) to dicyclopentadiene bisphenol cyanate ester (DCPDCE) on the curing behavior of EP/DCPDCE system was studied using differential scanning calorimetry and Fourier transform infrared spectroscopy. The conversion of –OCN groups and the formation of the reaction products in the different EP/DCPDCE systems and at different curing steps were determined. The results show that the epoxy resin has both a catalytic effect and a dilution effect on the trimerization reaction of –OCN groups. These two effects reach an approximate balance when the content of epoxy resin in the EP/DCPDCE system is 15 wt.%. In addition, the epoxy resin can improve the final conversion of –OCN groups, and the initial amount of epoxy resin has a significant influence on the final structure of the co-polymers.

Key Words: Cyanate ester, epoxy resin, curing behavior, dilution effect

First published on December 23, 2008
High Performance Polymers 2008, doi:10.1177/0954008308097424
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