【Author】 He Yuxin1 Zhang Li2 Yao Dahu1 Zhun Shenbing1 Liu Hu1 Zhang Yuqing1(1.Key Laboratory of Polymer Science and Nano-technology,Henan University of Science and Technology,Luoyang 471003; 2.College of Chemistry & Chemical Engineering,Luoyang Normal University,Luoyang 471022

【Abstract】 Coefficient of thermal expansion(CTE) of epoxy resin has a big influence on the property of carbon fiber reinforced epoxy laminate and how to decrease the CTE value of epoxy matrix is the key to improve the property of carbon fiber reinforced epoxy laminate at cryogenic temperature.Three kinds of thermoplastic were applied to modified epoxy resin and the CTE value of the resin was studied.The results showed that hydrogen bond was formed between C=O group of three kinds of thermoplastic and-OH of DGEBA epoxy resin during the course of curing,which strengthen the interfacial bonding between thermoplastic and epoxy matrix.Glass transition temperatures(Tgs) of three kinds of thermoplastic modified epoxy resin were all improved.In comparison to neat epoxy,the CTE values of PBT,PEI and PC modified epoxy resin below the Tg range were decreased 14.99%,17.44% and 23.96%,respectively,but the CTE values of three kinds of thermoplastic modified epoxy resin were all higher than neat epoxy above the Tg range. 


【Key words】 epoxy resin； thermoplastic； modification； hydrogen bond； coefficient of thermal expansion；