Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
권호 표지

The Modification of Epoxy Resins with Liquid Rubbers

Liquid Rubber를 이용한 Epoxy Resin의 개질

  • 최세영 (청주대학교 이공대학 화학과) ;
  • 김영준 (청주대학교 이공대학 화학과) ;
  • 윤주호 (청주대학교 이공대학 화학과)
  • Published : 1996.03.30
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Abstract

In order to Improve the fracture toughness of epoxy resin system, liquid chloroprene rubber(LCR) and liquid butadiene rubber (LBR) which have hydroxy group were used in the brittle epoxy system. Mechanical and toughness characterization of the modified epoxy resins were investigated as a function of liquid rubbers content. Epoxy resins modified with both of the liquid rubbers showed complete phase-separation microstructure : In all of the LCR content, it was observed that the domain size of LCR dispersed in the epoxy matrix ranging from $2{\mu}m\;to\;5{\mu}m$. It was found that fracture toughness, $K_{ic}$, of the modified LCR system was enhanced continuously as increasing LCR content. However around 10phr of LBR system showed maximum fracture toughness. Specifically, when BPA add to the modified LCR system, thermal and mechanical properties increased than neat epoxy. At the same time, fracture toughness was enhanced.

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