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Effects of chemical structure changes on curing reactions and thermal properties of cyanate ester‐cured rigid‐rod epoxy resins
Author(s) -
Su WF. A.,
Chuang ChihMin
Publication year - 2002
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.10887
Subject(s) - epoxy , cyanate ester , curing (chemistry) , thermal stability , materials science , cyanate , glass transition , thermal decomposition , thermosetting polymer , polymer chemistry , chemistry , composite material , organic chemistry , polymer
How chemical structure changes affect the curing reactions and thermal properties of 2,2′‐bis(4‐cyanatophenyl) propane (cyanate ester) cured rigid‐rod epoxy resins has been studied for biphenol and tetramethyl biphenol epoxies. The formation of an oxazolidinone ring is the dominant curing reaction for biphenol epoxy, whereas the formation of a cyanurate ring is the dominant curing reaction for tetramethyl biphenol epoxy, due to the bulky methyl substitutions on the biphenol chain. The crosslinkable cyanurate structure has a higher thermal stability than that of the linear oxazolidinone structure, giving the cyanate ester cured tetramethyl biphenol epoxy resin (molar equivalent) a higher glass transition temperature (260 vs. 218°C) and thermal decomposition temperature (366 vs. 312°C) than that of cyanate ester cured biphenol epoxy resin. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2419–2422, 2002