摘要
采用扩链改性法制备了由长链BMI-EK[4,4′-双(3-马来酰亚胺基苯氧基)二苯甲酮]、长链BMPP{2,2′-双[4-(4-马来酰亚胺基苯氧基)苯基]丙烷}、DABPA(二烯丙基双酚A)和BDM(N,N-4,4′-二苯甲烷双马来酰亚胺)组成的BMI-MIX(双马来酰亚胺混合体系),其中n(BDM)∶n(BMPP)∶n(BMI-EK)=2∶1∶1、n(混合BMI)∶n(DABPA)=1∶0.87。研究结果表明:BMPP、BMI-EK和BDM具有良好的固化匹配性;BMI-MIX的固化树脂具有优异的力学性能和良好的韧性,其冲击强度(21.87 k J/m2)、临界应力强度因子(KIC)和临界应变能释放率(GIC)比BDM/DABPA体系分别提高了101.7%、38.5%和73.2%,并且前者的玻璃化转变温度(Tg)可达到288℃,而且前者在低于270℃时仍保持良好的力学性能、在低于250℃时储能模量仍未降低。
A BMI-MIX[bismaleimide （BMI） mixed system], which consist from long chain BMI-EK[4,4＇-bis （3-maleimide phenoxy） diphenyl ketone], long chain BMPP{2,2＇-bis[4-（4- maleimide phenoxy） phenyl] propane}, DABPA （diallyl bisphenol A） and BDM （N, N-（4, 4＇- diphenylmethane maleimide）, was prepared by chain extension modification when molar ratios of n（BDM） ： n（BMPP） ： n（BMI-EK） and n（mixed BMI） ： n（DABPA） were 2 ： 1 ： 1 and 1 ： 0.87 respectively. The research results showed that the BMPP, BMI-EK and BDM had the good curing matching. The BMI-MIX curing resin had the excellent mechanical properties and good toughness because the impact strength （21.87 kJ/m2） , critical stress intensity factor（KIC） and critical strain energy release rate （GIC） of the BMI-MIX curing resin were 101.7% , 38.5% and 73.2% respectively more than those of the BDM/DABPA system. The glass transition temperature （Tg） of the former could reach 288 ℃, and the mechanical properties of the former were still good under 270 ℃, and its energy storage modulus wasn＇ t still decreased under 250 ℃.
出处
《中国胶粘剂》
CAS
北大核心
2015年第4期41-45,共5页
China Adhesives
关键词
双马来酰亚胺
改性
力学性能
断裂韧性
bismaleimide（BMI）
modification
mechanical property
fracture toughness
