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Cure and thermal properties of brominated epoxy systems
Author(s) -
Naé Hemi N.
Publication year - 1987
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.1987.070330410
Subject(s) - epoxy , glass transition , thermal stability , materials science , extender , kinetics , polymer chemistry , activation energy , thermal , composite material , chemical engineering , chemistry , polymer , organic chemistry , thermodynamics , polyurethane , physics , quantum mechanics , engineering
The addition of a brominated epoxy resin as a chain extender to di‐, tri‐, and tetrafunctional epoxy systems cured with diaminodiphenylsulfone has been investigated. The effect of increased BER content on the glass transition temperature of the cross‐linked systems is discussed. The T g of these systems is in the order T g (tri) > T g (tetra) > T g (di). The contributions of the chemical structure and the cross‐link density to the glass transition temperature are calculated. The kinetics of the reaction was followed dynamically by DSC. The overall order of the reaction and activation energies decrease with increased BER content. The thermal stability of these systems is also discussed.