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 obviously 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.%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6h的修复效率达34.5％；对于不同修复剂质量分数,修复时间从3h延长到6h的修复效率提高均比6h到9h的提高明显,修复剂分子链分子运动在6h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.
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