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Intumescent fire‐retardant coatings for plastics based on poly(vinylphosphonic acid): Improving water resistance with comonomers
Author(s) -
Williams Katherine,
Ebdon John R.,
Kandola Baljinder K.
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47601
Subject(s) - materials science , fire retardant , acrylonitrile , copolymer , monomer , intumescent , composite material , methacrylate , epoxy , photopolymer , adhesion , polymer chemistry , polymer
Coatings based on the in situ photopolymerization of vinyl phosphonic acid (VPA) with triallyl cyanurate as a crosslinking agent are shown to be effective not only for fire‐protecting glass fiber‐reinforced epoxy resin (GRE) composites but also poly(methyl methacrylate) (PMMA), a typical meltable and flammable thermoplastic. Dry adhesion of polyVPA coatings to PMMA surfaces is excellent but, as with coatings on GRE, adhesion following water‐soak tests is poor. Copolymerizing VPA with more hydrophobic monomers improves wet adhesion, albeit with some impairment of fire performance, with copolymers of VPA and acrylonitrile giving the best results. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 47601.