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Preparation and cured properties of novel cycloaliphatic epoxy resins
Author(s) -
Tokizawa Makoto,
Okada Hiroyoshi,
Wakabayashi Nobukatsu,
Kimura Tomiaki,
Fukutani Hideo
Publication year - 1993
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.1993.070500407
Subject(s) - epoxy , synthetic resin , epoxide , materials science , phthalic anhydride , cyclohexane , heat deflection temperature , chemical resistance , polymer chemistry , thermal stability , flexural strength , acetic anhydride , organic chemistry , chemistry , composite material , izod impact strength test , ultimate tensile strength , catalysis
Preparation and characterization of novel cycloaliphatic epoxy resins, which are derived from octadienyl compounds, were studied. From a model peracetic acid epoxidation reaction using 2,7‐octadienyl acetate‐1, the structure of the liquid resins is estimated to be mainly terminal epoxides and some amount of inner epoxide depending on the epoxide content. The epoxy resins offer lower toxicity and lower vapor pressure. The reactivity of the resin with acid anhydrides is moderate but faster than that of traditional cyclohexane epoxide‐type resins and slower than that of the glycidyl ester‐type resins. This reactivity was also examined using model compounds. The heat deflection temperature of the hexahydro‐phthalic anhydride‐cured resins is shown to be directly proportional to the number of epoxy groups in the molecules. The flexural strength of the cured resins is nearly equivalent to that of the commercial resins, although the flexural elongation of the resins is larger than that of the rigid cyclohexane epoxide‐type resins. The thermal stability of the cured resins is comparable to typical rigid cycloaliphatic resins; furthermore, high water resistance of the cured resins is suggested to be attributed to the hydrophobic character of the C 8 chain by cross‐linking. © 1993 John Wiley & Sons, Inc.