摘要
通过与二苯甲烷型双马来酰亚胺(MBMI)对比,对新型芳香族双马来酰亚胺单体(BBMI)进行了预聚、固化反应和性能研究。DSC表明,BBMI单体的反应活性较大,固化速度较快,与二烯丙基双酚A(DAB-PA)的预聚物凝胶时间较短。与MBMI/DABPA相比,BBMI/DABPA的Tg低2℃。热重分析表明,BBMI/DAB-PA的热稳定性优于MBMI/DABPA。与二苯甲烷型双马来酰亚胺相比,BBMI的弯曲强度提高了32.16 MPa,250℃的弯曲强度提高29.54 MPa,弯曲强度保留率从73.0%提高至78.6%。
Curing reaction and properties of BBMI, a new kind of aromatic bismaleimide is described. Compared with 4,4＇ -diphenylmethane bismaleimide （MBMI） ,BBMI has higher reactivity, faster curing reaction rate and shorter gel time,and its Ts is just 2℃ lower. Tlaermogravity analysis indicates that the thermal stability of BBMI is better than that of MBMI. Furthermore, flexible strength of BBMI is 32.16 MPa higher at ambient temperature and 16.84 MPa higher at 250℃ than that of MBMI, and its impact strength is 6.6 kJ/m2 higher as well.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2009年第2期38-41,共4页
Aerospace Materials & Technology
