高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (5): 985.

• 研究简报 • 上一篇    下一篇

超细SiO2填充聚甲基乙烯基硅氧烷的动态流变特性

胡洪国1, 郑强1,2, 陶小乐2   

  1. 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
  • 收稿日期:2003-05-09 出版日期:2004-05-24 发布日期:2004-05-24
  • 通讯作者: 郑 强(1960年出生),男,教授,博士生导师,主要从事高聚物流变学和多相多组分高分子体系结构与性能研究.E-mail:zhengqiang@zju.edu.cn E-mail:zhengqiang@zju.edu.cn
  • 基金资助:

    国家杰出青年基金(批准号:50125312);国家自然科学基金重点项目(批准号:50133020)资助

Dynamic Rheological Properties of Poly(methyl vinyl)siloxane Filled with Untrafine Porous Silica

HU Hong-Guo1, ZHENG Qiang1,2, TAO Xiao-Le2   

  1. 1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China;
    2. R & D Center of Hangzhou Zhijiang Silicone Co. Ltd., Hangzhou 311200, China
  • Received:2003-05-09 Online:2004-05-24 Published:2004-05-24

关键词: 超细SiO2, 聚甲基乙烯基硅氧烷, 动态流变特性

Abstract: Dynamic rheological properties of poly(methyl vinyl)siloxane(PMVS) filled with ultratra silica (SiO2) 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% SiO2 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 SiO2 approached 20%. We owe this phenomenon partly to the surface esterification of silanols and partly to the unvulcanized PMVS.

Key words: Ultrafine silica, Poly(methyl vinyl)siloxane, Dynamic rheological properties

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