摘要
利用差示扫描量热(DSC)法研究了过氧化物对QY8911- 型双马来酰亚胺树脂(BMI)的固化过程的影响。测试了过氧化物含量对树脂固化特性和力学性能的影响。结果表明,引入过氧化物降低了树脂的起始反应温度,提高了固化速度。弯曲强度略有提高,而冲击强度下降,因而过氧化物含量应小于0.6%。注射模压实验表明,引入过氧化物后,消除了短碳纤维(CF)增强BMI复合材料注射模压过程中的严重溢料现象,并使成型时间由原来的2h缩短到15min。
Differential scanning calorimetry was used to study the effect of the peroxide on the cure reaction of BMI. The effect of peroxide content on the properties of the cured BMI was investigated. The results show that the peroxide reduced the initial reaction temperature and prompted the reaction speed, increased the bending strength and decreases the impacting strength. So the peroxide content should be less than 0.6%. CF/SiO2/BMI composites are fabricated from the BMI containing peroxide and its microstructure and properties are better than those of the composites free of peroxide. According to the injection molding experiment the spilling problem is overcome and the forming time is reduced from two hours to fifteen minutes when peroxide was added.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2002年第6期106-110,共5页
Acta Materiae Compositae Sinica
基金
九五"国家重点科技攻关项目(98-A28-01-19)
