Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Study on the rheological properties of PP-SEBS/silicate composites

PP-SEBS/실리케이트 복합체의 유변학적 특성 연구

  • Kim, Youn-Cheol (Polymer Science & Engineering, Kongju National University)
  • 김연철 (공주대학교 신소재공학부 고분자공학)
  • Received : 2011.02.21
  • Accepted : 2011.04.07
  • Published : 2011.04.30
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Abstract

Polypropylene (PP)-SEBS/silicate composites with PP content of 35, 40, and 45wt% were fabricated by melt compounding at $200^{\circ}C$, using lab scale Brabender mixer. The content of silicate was fixed at 5wt%. The thermal properties of the PP-SEBS/silicate composites were investigated by differential scanning calorimetry (DSC) and thermogravimetric analyzer (TGA). The melting temperature of PP-SEBS compound decreased up to $141^{\circ}C$ with SEBS content. TGA result indicates an increase in degradation temperature when the silicate was added in the PP-SEBS compound. The rheological properties of the compounds were measured by dynamic Rheometer. PP-SEBS/silicate composite indicates higher shear thinning and elastic property than PP-SEBS compound. Van Gurp-Palmen analysis was applied in order to certify an increase in elasticity.

폴리프로필렌(polypropylene, PP)-SEBS(styrene-ethylene/butylene-styrene triblock copolymer)/실리케이트 복합체를 PP의 조성을 35, 40 그리고 45wt%로 변화시키며 실험실 규모의 Brabender Mixer를 이용하여 $200^{\circ}C$에서 용융상태에서 제조하였다. 실리케이트 조성은 5wt%로 고정하였다. PP-SEBS/실리케이트 복합체의 열적특성을 DSC와 TGA를 이용하여 분석하였다. PP-SEBS 콤파운드의 용융온도는 SEBS 함량에 따라 $141^{\circ}C$까지 감소하였다. 실리케이트가 PP-SEBS에 첨가되었을 때 분해온도가 증가하는 것을 TGA 결과로부터 확인할 수 있었다. 콤파운드의 유변학적 특성을 동적유변측정기를 이용하여 측정하였다. PP-SEBS/실리케이트 복합체는 PP-SEBS 콤파운드보다 shear thinning과 탄성특성이 증가하였다. 탄성특성 증가를 확인하기 위해 Van Gurp-Palmen 분석을 이용하였다.

Keywords

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