Low temperature relaxation of DGEBA epoxy resins: A thermally stimulated discharge current (TSDC) study
- 1 June 1989
- journal article
- research article
- Published by Wiley in Polymer Composites
- Vol. 10 (3) , 173-183
- https://doi.org/10.1002/pc.750100305
Abstract
The effect of curing conditions on the low temperature relaxation behavior of catalyst‐cured epoxy systems based on digliycidyl ether of bisphenol A (DGEBA) has been characterized by the thermally stimulated discharge current (TSDC) technique. In these chemically relatively simple epoxy systems, five relaxation processes, designated as γ, β, β′, βOH, and β″, have been observed: Their molecular origins are discussed in detail. The results are in agreement with prior suggestions of an inhomogeneous cross‐link density morphology.Keywords
This publication has 26 references indexed in Scilit:
- Studies of epoxy resin systems: Part C: Effect of sub‐Tg aging on the physical properties of a fully cured epoxy resinPolymer Engineering & Science, 1982
- Studies of epoxy resin systems: Part A: A study of the origins of the secondary relaxations of epoxy resins by thermally stimulated depolarizationPolymer Engineering & Science, 1982
- The β relaxation behavior of bisphenol‐type resinsJournal of Polymer Science: Polymer Physics Edition, 1982
- Dielectric relaxation phenomena in a series of polyhydroxyether copolymers of bisphenol‐A—endcapped polyethylene glycol with epichlorohydrinJournal of Polymer Science: Polymer Physics Edition, 1981
- Thermally stimulated discharge current studies on low‐temperature relaxation in epoxy resinJournal of Applied Polymer Science, 1980
- Effect of epoxy monomer crystallization and cure conditions on physical structure, fracture topography, and mechanical response of polyamide-cured bisphenol-A-diglycidyl ether epoxiesJournal of Macromolecular Science, Part B, 1978
- Experimental resolution of the retardation time spectrum in polymeric solids by a new method: Thermostimulated creepJournal of Macromolecular Science, Part B, 1977
- A new method for the study of molecular motion in polymeric solids: Thermally stimulated creepJournal of Polymer Science: Polymer Physics Edition, 1977
- Mechanical relaxation studies of the cure of epoxy resins: 2. Activation energy of the γ-process in amine-cured epoxy resinsPolymer, 1972
- Mechanical relaxation studies of the cure of epoxy resins: 1. Measurement of curePolymer, 1972