环氧树脂/有机硅改性双马来酰亚胺的性能研究

Properties of Epoxy/BMI Blends Modified with Organosilicone

以二(4-氨基苯氧基)二甲基硅烷(SIDA)、双马来酰亚胺(BMI)和双酚A型环氧树脂(E-51)为原料,通过扩链反应制备了E-51/BMI/SIDA共混物。结果表明,当SIDA含量为20%(质量分数,下同)时,E-51/BMI/SIDA的冲击强度和弯曲强度分别为38.52 kJ/m^2和120.54 MPa;E-51/BMI/SIDA热失重5%时的温度为336.8℃,600℃时的残炭量高达55.4%;E-51/BMI/SIDA的吸水率在8 d时仅为0.78%。

A modified resin system of E-51/BMI/SIDA was prepared by expanding chain reaction of bis(4-aminophenoxy) dimethylsilane(SIDA) and BMI.When the content of SIDA was 20 wt%,the impact strength and flexural strength of E-51/BMI/SIDA was 38.52 kJ/m^2 and 120.54 MPa,respectively.The 5%weight loss temperature of E-51/BMI/SIDA was 336.8℃,and the char yield of the blends was 55.4%at 600℃,the water absorption performance of E-51/BMI/SIDA was 0.78%at 8 days.