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采用均苯四甲酸酐(PMDA)固化聚丁二烯环氧树脂(ELPB),制备了ELPB/PMDA耐高温胶粘剂,并使用傅里叶红外光谱仪(FT-IR)、热重分析仪(TGA)、拉力机和数码显微镜对固化产物的性能进行了表征。实验结果表明,在200℃固化2h的条件下,PMDA可以对ELPB成功地固化;固化后的胶粘剂具有良好的耐热性能,其失重3%时的分解温度为300℃;该胶粘剂对铝/铝合金的粘接强度达到15MPa;剪切破坏是以内聚破坏为主的混合破坏,表明该胶粘剂对金属有较好的粘接性能。
The ELPB / PMDA high temperature adhesive was prepared by using pyromellitic dianhydride (PMDA) cured polybutadiene epoxy resin (ELPB). FT-IR, TGA, Rally machines and digital microscopes were used to characterize the properties of the cured product. The experimental results show that PMDA can successfully cure ELPB under the conditions of 200 ℃ curing 2h; the cured adhesive has good heat resistance, the decomposition temperature is 300 ℃ when the weight loss is 3% The bonding strength of the alloy reaches 15MPa. The shear failure is mainly caused by the cohesive failure, which indicates that the adhesive has good adhesion to metal.