摘要
以4,4-二氨基二苯砜(DDS)和内亚甲基四氢邻苯二甲酸酐(NA)为复配固化剂,采用高温模压成型法制备耐高温高导热环氧树脂/玻纤/氮化硼(BN)复合材料。探讨了BN用量和偶联剂处理对复合材料冲击强度、导热性能和电阻率的影响。结果表明:当nDDS:nNA=3:1时,复合材料的耐热性能最佳。当BN质量分数为8%时,复合材料的冲击强度最高;导热性能随BN用量的增加而增加,当BN用量为15%时,热导率为0.7560W/(mk),此时复合材料仍保持较高的体积、表面电阻率;当BN填充量为一定值时,偶联剂处理使冲击强度和导热性能得到进一步提高。
Curing performances of epoxy resin/glass fiber/BN composites with a high heat resistance and thermal conductivity during compression molding in the presence of nadic anhydride （NA）/ 4,4-diaminodiphenyl sulfone （DDS） in varying molar ratio were investigated in this paper. The effects of BN content and coupling agent treating on the properties including impact strength, thermal conductivity and heat resistance of the composites were studied. The results showed that the mixture of DDS and NA（0.75 ： 0.25） can give a much higher thermal stability among all the experimental ratios; 8% by weight of BN can impart a high impact strength ; the thermal conductivity of the composites has a proportional relationship with the content of BN and the coefficient of thermal conductivity k comes up to 0.7560W/（m · K） for 15% by weight of BN still keeping a high volume and surface resistivity ; for a given BN loading , surface modification of BN fillers exhibites remarkable positive effects on the impact strength and thermal conductivity of the composites.
出处
《粘接》
CAS
2010年第8期52-55,共4页
Adhesion
关键词
环氧树脂
氮化硼
玻璃纤维
导热
epoxy resin
boron nitride
glass fiber
thermal conductivity
