Toughening of Amine-cured Epoxy Resins by in situ Generated Poly(benzyl methacrylate)

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  • SHINOZAKI Hiroki
    Department of Advanced Materials Chemistry, Faculty of Engineering, Yokohama National University Kanagawa Academy of Science and Technology
  • OYAMA Toshiyuki
    Department of Advanced Materials Chemistry, Faculty of Engineering, Yokohama National University
  • TAKAHASHI Akio
    Department of Advanced Materials Chemistry, Faculty of Engineering, Yokohama National University

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Other Title
  • Ｉｎ　ｓｉｔｕ　生成ポリベンジルメタクリレートによるアミン硬化エポキシ樹脂の強靭化
  • In situ セイセイ ポリベンジルメタクリレート ニ ヨル アミン コウカ エポキシ ジュシ ノ キョウジンカ

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Description

The modification of 4,4′-diaminodiphenyl sulfone (DDS)-cured epoxy resins with in situ-generated poly(benzyl methacrylate) (PBzMA) was carried out in order to increase toughness of the epoxy resins without loss of mechanical and thermal properties. In situ preparation of the modifier led to a large increase in compatibility of the modifier with the epoxy matrix. The introduction of ethylene glycol dimethacrylate (EGDMA) as a crosslinking agent into modifier increased miscibility of the epoxy matrix with the modifier, and thereby the fracture toughness for the modified epoxy resin was increased by 70% with a slight loss of flexural strength, compared to the unmodified resin, when 14 wt% of BzMA+EGDMA(5 mol%) was added. The flexural modulus increased and the glass transition temperature decreased about 30°C. The results of DVA and the SEM and TEM observations suggest that an interpenetrating polymer network (IPN) was formed at the interface of modifier and epoxy matrix.<br>

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 66 (6), 217-224, 2009

    The Society of Polymer Science, Japan

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