双马来酰亚胺改性耐高温环氧树脂胶粘剂的研究

Study on high temperature resistance-EP adhesive modified by bismaleimide

以BMI(双马来酰亚胺)作为改性剂、DDM(4,4’-二氨基二苯甲烷)作为固化剂,制备耐高温EP(环氧树脂)胶粘剂。研究结果表明:采用正交试验法优选出制备BMI/EP/DDM胶粘剂的最优方案为m(EP)∶m(DDM)=1∶1.00、m(BMI)∶m(EP)=0.4∶1、混合搅拌时间为30 min和搅拌转速为300 r/min;采用非等温DSC(差示扫描量热)法和T-β(温度-升温速率)外推法,确定了该胶粘剂的固化工艺条件为"60℃处理3 h→88℃处理2 h→112℃处理2 h→121℃处理2 h";经BMI改性后,耐高温EP胶粘剂的耐热性和力学性能均有所提升。

With BMI （bismaleimide） as modifier, DDM （4,4＇-diamino diphenyl methane） as curing agent, a high temperature resistance-EP （epoxy resin） adhesive was prepared. The research results showed that the optimal scheme of preparing BMI/EP/DDM adhesive was preferred by orthogonal experiment when mass ratios of m （EP） ： m（DDM） and m（BMI） ： m（EP） were 1：1.00 and 0.4：1 respectively, mixing stirring time and stirring speed were 30 min and 300 r/rain respectively. The curing process conditions for ＂60 ~C treatment 3 h--~88 ~C treatment 2 h---＋ 112 ~C treatment 2 h--＊121 ~C treatment 2 h＂ of BMI/EP/DDM adhesive were determined by non-isothermal DSC （differential scanning calorimetry） method and T-/3 （temperature-heating speed） extrapolation method. The heat resistance and mechanical properties of high temperature resistanee-EP adhesive, which was modified by BMI, could be improved.