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The beta relaxation in epoxy resin‐based networks
Author(s) -
Williams John G.
Publication year - 1979
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.1979.070231201
Subject(s) - epoxy , curing (chemistry) , diluent , materials science , polymer chemistry , relaxation (psychology) , torsion pendulum clock , composite material , chemistry , organic chemistry , psychology , social psychology , physics , quantum mechanics
The dynamic properties of epoxy–amine networks have been studied using a torsion pendulum, and the effect of replacement of resin by monoglycidyl ethers on the beta relaxation has been determined. It is shown that the loss peak is not sensitive to glyceryl units derived from the monofunctional diluents. From the effect of mixtures of aliphatic and aromatic‐based epoxy resins on the relaxation and from the loss properties of systems with varying ratio of resin to curing agent and catalytically cured systems, it is suggested that the loss peak has at least two basic components. One is related to the presence of glyceryl units derived from polyfunctional glycidyl compounds, while the other may be related to the presence of diphenylpropane units in the resin.