화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.14, No.3, 261-266, June, 2006
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The Effect of Glass Fiber and Coupling Agents in the Blends of Silicone Rubber and Liquid Crystalline Polymers
T. Das†, A. K. Banthia, B. Adhikari, Hyewon Jeong1, Chang-Sik Ha1, and S. Alam2
  • Materials Science Centre, Indian Institute of Technology, Kharagpur-721302, India
  • 1Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea
  • 2Defence Materials and Stores Research and Development Establishment, Kanpur-208013, India
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Blends of silicone rubber (VMQ) and liquid crystalline polymer (LCP) were prepared using a melt blending technique in the presence and absence of glass fiber and coupling agents. The effect of glass fiber and coupling agents on the thermal, dynamic mechanical, morphological pro-perties and cure characteristics of VMQ/LCP blends were studied. The vinyl silane coupling agent showed a significant effect on the above mentioned properties of VMQ/LCP blends by reacting at the interface between VMQ and LCP. The viscosity of the VMQ/LCP blends decreased with the addition of a coupling agent. A substantial improvement in storage modulus of VMQ/LCP blends was observed in the presence of glass fiber and coupling agents. However, as a coupling agent vinyl silane proved to be better than amine for the VMQ/LCP-glass-containing blends. The thermal stability of the pure silicone rubber was higher than those of the blends. This high thermal stability of silicone rubber was attributed to the Si-O-Si bonds. However, the thermal stability of the blends decreased further in the presence of a coupling agent, possibly due to a decrease in blend crystallinity.
Keywords:liquid crystalline polymer;silicone rubber;coupling agent;crystallinity;blend
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