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Cure behavior and thermal degradation mechanisms of epoxy and epoxy–cyanate resins
Author(s) -
Régnier N.,
Fayos M.,
Moreau P.,
Lafontaine E.,
Mortaigne B.
Publication year - 1999
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199911)10:11<637::aid-pat915>3.0.co;2-7
Subject(s) - diglycidyl ether , epoxy , bisphenol a , materials science , diamine , cyanate , monomer , fourier transform infrared spectroscopy , polymer chemistry , cyanate ester , methylene , ether , amine gas treating , polymer , organic chemistry , chemistry , composite material , chemical engineering , engineering
The cure reactions of tetraglycidyl methylene diamine (TGMDA) epoxy cured with tetrasubstituted aromatic diamine on one hand and diglycidyl ether of bisphenol A and diglycicyl ether tetrabromobisphenol A epoxies cured with methylene bis (phenyl‐4‐cyanate) on the other hand are reported. Systematic Fourier transform infrared (FTIR) spectroscopy studies of the cure reaction of epoxy and epoxy–cyanate during thermal cycles are presented. FTIR studies indicate that the reaction of TGMDA monomer is total but the network contains a large amount of primary amine. The cyanate monomer reacts rapidly to form triazine structures. Then the epoxy monomers homopolymerize and crosslink with free cyanate groups. The gas chromatography/mass spectrometry study of volatile products evolved during the polymer thermal degradation shows the dehydration of the epoxy network and the decomposition of the amine structure. The FTIR and solid‐phase 13 C nuclear magnetic resonance analysis revealed that the ether functions and the amine groups are temperature sensitive but the triazine structure is not. Copyright © 1999 John Wiley & Sons, Ltd.