微纳粒子/纤维增强耐高温加成型导热硅橡胶的研究  

Study on the High-temperature-resistance and Thermal-conductivity Addition Curing Type Silicone Rubber Enhanced by Micro/Nano Particles and Fiber

作　　者：黄月文[1,2] 王斌[1,3] 郑周[1,2] 张伟[1,3] 

机构地区：[1]中科院广州化学有限公司,广东广州510650 [2]广东省电子有机聚合物材料重点实验室,广东广州510650 [3]广州市电子信息聚合物工程中心,广东广州510650

出　　处：《广州化学》2015年第3期1-6,共6页Guangzhou Chemistry

基　　金：广州市科技计划项目(2014J4100226)

摘　　要：将纳米尺寸乙烯基甲基MQ硅树脂、硼酸酯偶联剂、微米级导热BN填料混杂在端乙烯基甲基硅油中,通过交联剂含氢甲基硅油、抑制剂乙炔基环己醇及Karstedt催化剂制备出具有室温流动性好、操作时间长的液体硅橡胶,探讨了体系的热交联固化增强机理。通过玻璃纤维改性的硅橡胶的拉伸强度可提高1倍以上。随着BN掺量的增加,导热率大幅提升,导热率可达到1.9 W/(m·K),并且具有较高的耐高温性能,此时10%的质量损失时的温度可达658 K。A novel liquid silicone rubber with good fluidity and long operation time at room temperature was prepared by mixing terminated-vinyl methyl silicon oil and nano-scale vinyl methyl MQ silicone resin, borate ester coupling agent, micro-scale thermal-conductivity BN particles, crossing-linking agent methyl hydrogen polysiloxane fluid, inhibitor ethynylcyclohexanol and catalyst Karstedt. The heat curing and enhancing mechanism was investigated. The tensile strength of the silicone rubber further enhanced by glass fiber was improved more than one times. The thermal conductivity was increased substantially with the content increase of BN. The coefficient of heat conductivity of the silicone rubber can reach 1.9 W/（m.K）, at the same time, the temperature of 10% mass loss was 658 K.

关 键 词：乙烯基甲基MQ硅树脂 加成型液体硅橡胶 高导热 耐高温 

分 类 号：O634.41[理学—高分子化学]