Composites Research

  • 제20권1호
  • /
  • Pages.23-31
  • /
  • 2007
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  • 2288-2103(pISSN)
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  • 2288-2111(eISSN)
한국복합재료학회 (The Korean Society for Composite Materials)
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Jute fiber Green Composite의 커플링제에 의한 물리적 인자의 변화와 기계적 특성 향상

Relations between Physical Parameters and Improvement of Mechanical Properties in Jute Fiber Green Composites by Maleic Anhydride Coupler

  • 이정훈 (한국기계연구원 복합재료연구팀) ;
  • 변준형 (한국기계연구원 복합재료연구팀) ;
  • 김병선 (한국기계연구원 복합재료연구팀) ;
  • 박종만 (경상대학교 나노.신소재공학부 고분자공학) ;
  • 황병선 (한국기계연구원 복합재료연구팀)
  • 발행 : 2007.02.28
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초록

Jute fiber Green Composite의 기계적 향상을 위한 계면특성을 향상시키기 위하여 커플링제를 도입하여 첨가량에 따른 특성변화를 실험적으로 규명하였다. Maleic anhydride grafted popolypropylene(MAPP)는 자연섬유와의 계면특성의 향상에서 물리화학적 역할을 하는 것으로 판단된다. MAPP에 의한 용융상태에서의 낮아진 수지의 점도는 흐름성이 향상되어 섬유의 계면과의 접촉 면적을 확대시킨다. 약 80mm의 jute 장섬유 mat에 maleated coupler가 혼합된 PP 복합재의 물성 향상과 열가소성수지의 물리적 변화와의 관계를 고찰하였다. 이 물리적 현상을 유동지수(MI: Melting flow index) 및 점도, contact angle, 복합재료 두께, 계면전단강도, morphology 분석 등의 인자들을 이용하여 기계적 물성 향상에 기여하는 정도를 확인하였다. 특히 유동지수(MI)와 점도, MAPP의 혼합량은, 전당강도(IFSS), 인장 및 굴곡 강도와 인장탄성률의 향상과 매우 관계가 있음을 실험 결과를 통하여 확인하였다.

In order to improve the mechanical properties of jute fiber/polypropylene(PP) composites, the property change with the addition of a coupling agent, maleic anhydride polypropylene(MAPP) was examined experimentally. The maleated coupler acts as an intermediate to chemically connect the polar nature of the fiber and non-polar nature of the polyolefin polymer resin. Furthermore, the decrease in viscosity of the resin which results from the melting point reduction by the MAPP, leads to an increase of contact area with the fiber interface. We discussed the improvement of the PP composite blend of the maleated coupler with the 80mm jute long fiber mat in conjunction with the change of physical parameters in the thermoplastic resin. We confirmed the extent of contribution to the mechanical physical enhancement by using the following parameters: melting flow index(MI) and viscosity, contact angle, thickness of the composite, interfacial shear strength and morphology observation etc. Especially it was observed that the MI and viscosity, MAPP mixture had a very strong relationship with the tensile and flexural strength and modulus, and interfacial shear strength(IFSS).

키워드

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