A Study on the Rheological Properties of Branched Polypropylene/silicate Composites

분지형 폴리프로필렌/실리케이트 복합체의 유변학적 특성 연구

  • Dahal, Prashanta (Department of Environment Engineering, Kongju National University) ;
  • Yoon, Kyung Hwa (Department of Environment Engineering, Kongju National University) ;
  • Kim, Youn Cheol (Department of Environment Engineering, Kongju National University)
  • 프러산터 (공주대학교 신소재공학부 고분자공학) ;
  • 윤경화 (공주대학교 신소재공학부 고분자공학) ;
  • 김연철 (공주대학교 신소재공학부 고분자공학)
  • Received : 2011.09.02
  • Accepted : 2011.10.12
  • Published : 2011.12.10

Abstract

Branched polypropylenes (LCB-PP) with a long chain branch were prepared by the solid-state and molt-state reaction. Divinylbenzene (DVB), 1,4-benzenediol (RES), and furfuryl sulphide (FS) were used as branching agents of fabricate LCB-PP/silicate composites. Chemical structures, thermal properties, and rheological properties of the LCB-PP were determined by FT-IR, DSC, TGA, and dynamic rheometer (ARES). The chemical structure of the LCB-PP was confirmed by the existence of =C-H stretching peak of the branching agent at $3100cm^{-1}$. From DSC and TGA results, the melting reaction was more effective than the solid state reaction in the manufacture of LCB-PP, which was additionally certified by rheological properties. Based on rheological properties, FS was the best for branching efficiency of PP. Compared to PP, LCB-PPs indicated an increase of complex viscosity in the low frequency and shear thinning tendency, and G'-G" plot represented an increase in elasticity and the heterogeneousness in a melt state. Rheological properties of LCB-PP/silicate composites were observed with the silicate content. When 5 wt% silicate was added in LCB-PP, distinct changes in the shear thinning and the slope of G'-G" plots were observed.

Keywords

polypropylene;long chain branch;silicate;rheological property

Acknowledgement

Supported by : 한국연구재단

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