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Multifunctional epoxy resins
Author(s) -
Choudhary Veena,
Agarwal Seema,
Varma I. K.
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.1993.070491006
Subject(s) - epoxy , curing (chemistry) , materials science , thermogravimetric analysis , epichlorohydrin , diglycidyl ether , thermal stability , composite material , sulfone , glass transition , polymer chemistry , ether , thermosetting polymer , bisphenol a , chemistry , polymer , organic chemistry
The curing behavior of epoxy resins prepared by reacting epichlorohydrin with 4,4′‐diaminodiphenyl methane (DADPM)/4,4′‐diaminodiphenyl ether (DADPE) or 4,4′‐diaminodiphenyl sulfone (DDS) was investigated using DDS and tris ‐( m ‐aminophenyl)phosphine oxide (TAP) as curing agents. A broad exothermic transition with two maxima were observed in the temperature range of 100–315°C when TAP was used as the curing agent. The effect of varying DDS concentration on curing behavior of epoxy resin was also investigated. Peak exotherm temperature ( T exo ) decreased with increasing concentration of DDS, whereas heat of curing (Δ H ) increased with an increase in amine concentration up to an optimum value and then decreased. Thermal stability of the resins, cured isothermally at 200°C for 3 h, was investigated using thermogravimetric analysis in a nitrogen atmosphere. Glass fiber‐reinforced multifunctional epoxy resin laminates were fabricated and the mechanical properties were evaluated. © 1993 John Wiley & Sons, Inc.