高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (10): 2011.

• 研究简报 • 上一篇    下一篇

纳米碳酸钙粒子在硅酮密封胶中的增强作用

王跃林1, 伍青1, 杜荣昵2, 王勇2, 高小铃2, 傅强2   

  1. 1. 中山大学高分子科学研究所, 广州 510510;
    2. 四川大学高分子材料系, 高分子材料工程国家重点实验室, 成都 610065
  • 收稿日期:2001-08-20 出版日期:2002-10-24 发布日期:2002-10-24
  • 通讯作者: 傅 强(1963年出生),男,教授,主要从事高分子共混复合材料和纳米复合材料研究.E-mail:qiangfu@scu.edu.cn E-mail:qiangfu@scu.edu.cn
  • 基金资助:

    国家自然科学杰出青年基金(批准号:29925413)资助

Reinforcement Property in Silicon Sealant by Nano CaCO3 Particles

WANG Yue-Lin1, WU Qing1, DU Rong-Ni2, WANG Yong2, GAO Xiao-Ling2, FU Qiang2   

  1. 1. Institute of Polymer Science, Zhongshan University, Guangzhou 510510, China;
    2. Department of Polymer Science & Materials, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
  • Received:2001-08-20 Online:2002-10-24 Published:2002-10-24

关键词: 硅酮结构胶, 纳米碳酸钙粒子, 增强作用

Abstract: Reinforcement property of structural silicon sealant as a function of the size and loading of nano CaCO3 particles has been investigated by mechanical measurement and DMA experiments. The tensile strength and elongation at break of silicone sealant were found greatly enhanced by nano CaCO3 particles. The smaller the particle size, the higher the tensile strength and the elongation will be. The storage modulus is also remarkably increased with the increasing of CaCO3 loading and decreasing of CaCO3 particle sizes, as revealed by DAM. Two relaxation peaks are seen for silicon sealant. One is around 153 K, corresponding to the glass transition temperature(Tg), and the other is around 233 K, corresponding to the melting temperature(Tm). Both Tg and Tm increase with the increasing of CaCO3 loading and decreasing of CaCO3 particle sizes. DMA results suggest that the interaction between nano CaCO3 particles and silicon sealant is quite strong. The molecular motion of silicon sealant is highly limited by the dispersed nano CaCO3 particles.

Key words: Silicon sealant, Nano CaCO3 particles, Enhancement

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