熔融改性修复剂制备自修复环氧树脂复合材料及其性能  

Preparation and performance of self-healing epoxy resin composite with healing agent modified by melt reaction

作　　者：袁新华[1] 刘永强[1] 韩志锐[1] 许君尉[1] 陈燕秋[1] 胡杰[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2013年第2期217-221,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(20704019);教育部留学回国人员科研启动基金资助项目(2011508);江苏大学拔尖人才项目(1211220003)

摘　　要：用3-苯基丙酸通过熔融法改性缩水甘油封端双酚A-环氧氯丙烷共聚物,制备了环氧树脂自修复复合材料.研究结果表明:3-苯基丙酸可屏蔽修复剂分子链末端环氧环;修复剂填充量增加,修复效果明显改善,改性修复剂质量分数为10%时,120℃修复6 h的修复效率达34.5%;对于不同修复剂质量分数,修复时间从3 h延长到6 h的修复效率提高均比6 h到9 h的提高明显,修复剂分子链分子运动在6 h左右达到新的平衡;修复温度提高,修复效率明显提高,修复熔融温度120～130℃时,修复剂分子链作整链运动;试样多次修复效率随修复次数增加而降低,不添加修复剂试样的修复效果主要来源于二次固化作用,添加修复剂试样的多次修复效率下降趋势明显降低.Poly（ bisphenol A-co-epichlorohydrin） glycidyl end-capped （BPA-co-ECH GEC） was modified by melt reaction with 3-phenylpropionic acid to prepare self-healing epoxy resin composite. The results show that epoxy end groups can be reacted with 3-phenylpropionic acid. The healing efficiency is markedly improved by the increasing of healing agent content. The healing efficiency reaches 34.5% with 10% healing agent at 120 ℃ for 6 h. The enhancement of healing efficiency from 3 h to 6 h is ob- viously more than that from 6 h to 9 h for every sample with different healing agent content. The molecular motion of healing agent molecular chain reaches new equilibrium for the healing time of 6 h. The healing efficiency is increased by increasing healing temperature. The whole healing agent molecular chains motion at healing temperature range of 120 to 130 ℃. Multi-time re-healing efficiency is decreased with the increasing of healing time. The healing effect of samples without healing agent is due to the re-solidification of epoxy resin. The downtrend of multi-time re-healing efficiency is markedly decreased by adding healing agent.

关 键 词：环氧树脂 复合材料 自修复 裂纹 熔融改性 

分 类 号：O633[理学—高分子化学]