微米级氧化铝及其表面处理方式对硅橡胶性能的影响  

Effects of micrometer alumina and its surface treatment methods on properties of silicone composites

作　　者：胡佳勋 陈根宝[1] 李小奇[1] 吴叔青[1] 罗权焜[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《合成橡胶工业》2016年第4期303-307,共5页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(21073066);广州市产学研协同创新重大专项民生科技研究项目(1561000293)

摘　　要：以甲基乙烯基硅橡胶(MVQ)为基质、氧化铝为填料,研究了氧化铝的粒径、填充量及表面处理方式对复合材料动态力学性能和拉伸性能的影响。结果表明,在高温段氧化铝粒径对MVQ复合材料储能模量的影响不大,但大粒径的氧化铝有利于提高其损耗因子,而小粒径填料的加入可以拓宽其阻尼温域。随着氧化铝填充量的增加,MVQ复合材料的损耗因子和储能模量均增大,而拉伸强度和扯断伸长率有所下降。与用偶联剂处理的氧化铝相比,吡咯聚合物包覆的氧化铝可以同时提高MVQ复合体系的损耗因子和储能模量,并拓宽阻尼温域,其拉伸强度略有下降,但扯断伸长率的变化不大。The effects of sizes, contents and sur- face treatment methods of alumina on the dynamic properties and tensile properties of silicone compos- ites were studied with methylvinyl silicone rubber as matrix and alumina as filler. The results showed that the particle size of alumina had little effect on sto- rage modulus in high temperature zone. However, a higher loss factor was observed for the composites filled with larger particles, and a broader damping temperature range was found for the composites filled with smaller particles. Storage modulus and loss factor of the composites improved with the increase ofalumina contents, while the tensile strength and elongation at break of that decreased. Compared with the alumina treated by silane coupling agent, alumina coated with a thin polypyrrole film could improve the storage modulus and loss factor, as well as broaden damping temperature range of the compo- sites. The tensile strength slightly decreased and the elongation at break had little change with the poly- pyrrole-coated alumina as filler.

关 键 词：甲基乙烯基硅橡胶 氧化铝 阻尼性能 表面改性 损耗因子 储能模量 拉伸性能 

分 类 号：TQ333.93[化学工程—橡胶工业]