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Kinetic parameters in non‐stoichiometric epoxy‐resin/ m ‐xylylenediamine reactions
Author(s) -
Abuín Senén Paz,
Pellín Mercedes Pazos,
Núñez Lisardo,
Gándara Jesús Simal,
Losada Perfecto Paseiro
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.1993.070470313
Subject(s) - epoxy , autocatalysis , curing (chemistry) , bisphenol a , stoichiometry , amine gas treating , materials science , reaction mechanism , polymer chemistry , reaction rate , chemistry , composite material , catalysis , organic chemistry
Abstract The curing reaction of bisphenol A epoxy resin has been widely studied. We have found that when initial reactants are highly pure the reaction epoxy resin/ m ‐xylylenediamine follows a predominantly autocatalytic path independent of the temperature. The purpose of this study was to discern if the kinetic model is appliable at high values of amine/epoxy equivalent ratio. Because of the nature and reactivity of m ‐xylylenediamine ( m ‐XDA), the studies were carried out at low temperatures. Also, in order to obtain information about the formation mechanism of the system, different parameters such as reaction orders, activation energies, and reaction rate variation with concentration have been studied at different (1.5 : 1, 2 : 1, and 3 : 1) amine/epoxy equivalent ratios. © 1993 John Wiley & Sons, Inc.