摘要
采用二元胺扩链改性，以提高前文［１］研究的低温固化共聚型ＢＭＩ树脂的韧性。研究了扩链ＢＭＩ树脂的配方、反应性、工艺性及其浇铸体和复合材料的性能。结果表明，改性ＢＭＩ树脂的固化温度降到了１５０℃，韧性得到提高，复合材料性能优异。浇铸体弯曲强度１１９ＭＰａ，热变形温度２７２℃；玻璃纤维复合材料弯曲强度２０３４ＭＰａ，短梁剪切强度９１．８ＭＰａ。
The cure temperature of bismaleimide (BMI) resins is known to be higher than 200℃, although their heat resistance and many other properties are excellent. The authors previous study has shown that initiator is very effective in lowering the cure temperature of BMI resins, but its cured resin is brittle. This paper tried to use diamine extender and diallyl bisphenol A comonomer to increase toughness of modified resin. An optimum resin formulation cured at 150℃ was obtained using a computer aided quadratic regression orthogonal combination design method. The resin casts have been detected to have the properties of middle toughness and excellent heat resistance, and composites to have good mechanical properties. This work has laid a good foundation for manufacturing composite tools and structures.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1997年第3期61-66,共6页
Acta Materiae Compositae Sinica
关键词
双马来酰亚胺
烯丙基双酚
低温固化
扩链
树脂
bismaleimide, low temperature curable, extender, diallyl bisphenol A
