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Synthesis and characterization of benzoxazine‐based phenolic resins: Crosslinking study
Author(s) -
Espinosa M. A.,
Cádiz V.,
Galià M.
Publication year - 2003
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.12678
Subject(s) - curing (chemistry) , flammability , synthetic resin , thermal stability , polymer chemistry , polymerization , materials science , catalysis , lewis acids and bases , phenols , copolymer , organic chemistry , chemistry , polymer
Modified novolac resins with benzoxazine rings were prepared. The synthetic method involved the preparation of 1,3,5‐triphenylhexahydro‐1,3,5‐triazine as an intermediate that further reacts with the novolac resin. The catalytic effects of phenols, carboxylic acids, and Lewis acids on the benzoxazine ring‐opening polymerization were shown. The curing behavior of the benzoxazine compounds and the thermal properties of the cured resin were studied, and the results indicated improved degradation behavior for flammability. V‐0 materials were obtained when the materials were tested for ignition resistance using the UL‐94 test. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 470–481, 2003