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Epoxy/poly(4-vinylphenol) blends crosslinked by imidazole initiation

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Abstract

Poly(4-vinylphenol) (PVPh) was used as thermoplastic modifier of epoxy resins. Binary epoxy/PVPh mixtures with high thermoplastic content rise high glass transition temperatures (T g) after heating, due to the epoxy-phenol reaction. Blends with low PVPh percentages reach high T g if 2-methylimidazole is added, which catalyses epoxy homopolymerisation and epoxy-phenol reaction. The cured blends do not present phase separation although the network structure depends on the epoxy/phenol ratio. At low PVPh percentage the main crosslinking reaction is epoxy-epoxy but, when the thermoplastic content increases, the epoxy-phenol reaction prevails, causing an important T g increase and becoming less brittle.

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Authors and Affiliations

  1. Dpt. Ciencia e Ingeniería de Materiales, ESCET, Universidad Rey Juan Carlos, Madrid, Spain

    Silvia G. Prolongo

  2. Dpt. Materiales y Producción Aeroespacial, E. T. S. I. Aeronáuticos, Universidad Politécnica de Madrid, Madrid, Spain

    G. Prolongo

Authors
  1. Silvia G. Prolongo
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  2. G. Prolongo
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Correspondence to G. Prolongo.

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Prolongo, S.G., Prolongo, G. Epoxy/poly(4-vinylphenol) blends crosslinked by imidazole initiation. J Therm Anal Calorim 87, 259–268 (2007). https://doi.org/10.1007/s10973-006-7803-z

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  • DOI: https://doi.org/10.1007/s10973-006-7803-z

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