Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
권호 표지

The Effect of Glass Fiber and Coupling Agents in the Blends of Silicone Rubber and Liquid Crystalline Polymers

  • Das T. (Materials Science Centre, Indian Institute of Technology) ;
  • Banthia A.K. (Materials Science Centre, Indian Institute of Technology) ;
  • Adhikari B. (Materials Science Centre, Indian Institute of Technology) ;
  • Jeong Hye-Won (Department of Polymer Science and Engineering, Pusan National University) ;
  • Ha Chang-Sik (Department of Polymer Science and Engineering, Pusan National University) ;
  • Alam S. (Defence Materials and Stores Research and Development Establishment)
  • Published : 2006.06.01
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Abstract

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

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