晶须改性二苯甲烷型双马来酰亚胺树脂体系的研究

以硼酸铝晶须、钛酸钾晶须为增强剂，以N，N′-二胺基二苯甲烷型双马来酰亚胺(BMI)／O，O′-二烯丙基双酚A(BA)体系作为基体，采用浇注成型工艺制备了晶须增强二苯甲烷型双马来酰亚胺树脂基复合材料。研究了晶须对树脂体系凝胶特性的影响，晶须对体系固化反应性的影响；晶须的种类、表面处理方法、含量对树脂体系力学性能和热性能的影响；树脂体系的固化工艺材料对性能的影响。结果表明，晶须对树脂体系固化工艺影响不大；硼酸铝晶须增强效果优于钛酸钾晶须；偶联剂以丙酮作溶剂处理的效果优于乙醇水溶液，酸化溶剂的效果更好；晶须可明显改善体系的力学性能和耐热性，在晶须添加量为15％左右时，所得体系的综合性能较好；改进的固化工艺有助于树脂体系性能的改善。在本研究中，弯曲强度最大提高了约18％，热变形温度最大提高了12％。

Study of Whiskers Modified Bismaleimide/O,O'-Diallybisphenol Composites

Bismaleimide/O,O'-diallybisphenol A(BMI/BA) composites reinforced with aluminum borate whiskers and potassium titanate whiskers were prepared by casting methods.The effects of whiskers on gel properties and curing process were studied, and influences of kinds,surface treatment approaches and loading of whiskers on mechanical and thermal properties of the composite were investigated. The results indicated that whiskers had almost no influence on the curing process;the reinforcement of aluminum borate whiskers was much stronger than potassium titanate whiskers;the solvents and the PH of solvents played an important role in the reinforcing effect of whiskers.The whiskers could improve the mechanical properties and thermal resistance obviously; when their loadings were about 15 %,the composites were endowed with better comprehensive properties.The modified curing process could help to improve the properties of the resin,and flexual strength and heat deformation temperature were increased by 18 % and 12 % respectively.