【作者】 王汝敏； 郑水蓉； 刘峰； 杨利；

【Author】 Wang Rumin Zheng Shuirong Liu Feng Yang Li (Northwestern Polytechnical University)

【机构】 西北工业大学；

【摘要】 双马来酰亚胺是一类性能优异的新型树脂基体,脆性大是限制其应用的主要缺点。5405是一种韧性较高已用于飞机构件的改性双马来酰亚胺树脂。本文探讨用刚性的热塑性树脂共混的方法进一步增韧 5405树脂,所用的热塑性树脂有普通低分子量聚醚砜(PES)、酚酞聚芳醚砜(PES—C)、酚酞聚芳醚酮(PEK—C) 和端羟基酚酞聚芳醚酮(PEK—C-OH)。研究结果表明,少量热塑性树脂的加入能进一步提高5405树脂的韧性 ,同时不降低树脂的耐热性,四种热塑性树脂以普通低分子量PES的增韧效果最为显著,5份(3．23％)、 10份(6．25％)PES的混入,使树脂浇铸体的冲击强度提高87．2％、176．6％,弯曲强度提高13．8％、4． 32％。扫描电镜观察未见到明显的两相形态结构。更多还原

【Abstract】 Bismaleimide resin is a new generation of thermosetting matrixes with excellent heat-resistant properties, but its great brittleness often limits itself from wide applications. 5405 is a new kind of toughened bismaleimide resin which was already used in aircraft primary structure composite. In this paper, four kinds of thermoplastics, PES, PES-C, PEK-C and PEK-C-OH, were chosen to toughen 5405 resin further. The results show that addition of low proportion of thermoplastics can greatly increase the toughness of 5405 resin, and of four thermoplastics used, PES with low molecular weight is best in toughening effects.更多还原