文献类型：期刊文章

作　　者：胡洪国[1] 郑强[1] 陶小乐[2]

机构地区：[1]浙江大学高分子科学与工程学系,杭州310027 [2]杭州之江有机硅有限公司研究发展中心,杭州311200

出　　处：《高等学校化学学报》

基　　金：国家杰出青年基金 (批准号 :5 0 12 5 3 12 );国家自然科学基金重点项目(批准号 :5 0 13 3 0 2 0 )资助

年　　份：2004

卷　　号：25

期　　号：5

起止页码：985-987

语　　种：中文

收录情况：AJ、BDHX、BDHX2000、CAS、CSCD、CSCD2011_2012、EI、IC、JST、RCCSE、RSC、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：Dynamic rheological properties of poly(methyl vinyl)siloxane(PMVS) filled with ultratra silica (SiO 2) were analyzed on an advanced rheometric expansion system(ARES) at 25 ℃ by varying the strain (γ) and the frequency (ω). The results show that an incorporation of 5% SiO 2 into PMVS at 25 ℃ could be enough to impact a significant increase on the storage modulus (G′) of the uncured system, which is believed to be caused by the strong interactions among silica fillers. Meanwhile, γ dependence of G′ related to Payne effect was observed upon increasing γ amplitude, and no distinct “second plateau” was observed even the content of SiO 2 approached 20%. We owe this phenomenon partly to the surface esterification of silanols and partly to the unvulcanized PMVS.

关 键 词：超细二氧化硅 聚甲基乙烯基硅氧烷  动态流变特性  动态粘弹性

分 类 号：O634.41]