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HERO ID
7924778
Reference Type
Journal Article
Title
Activation energies for the thermodegradation process of an epoxy-diamine system - Influence of the curing cycle selection
Author(s)
Nunez-Regueira, L; Villanueva, M; Fraga-Rivas, I
Year
2006
Is Peer Reviewed?
1
Journal
Journal of Thermal Analysis and Calorimetry
ISSN:
1388-6150
EISSN:
1588-2926
Volume
83
Issue
3
Page Numbers
727-733
Language
English
DOI
10.1007/s10973-005-6980-5
Web of Science Id
WOS:000236616400035
Abstract
The study of the degradation of a polymer is important because it can determine the upper temperature limit, the mechanism of a solid-state process, and the life-time for this system. Since the behavior of thermosets is affected by the selection of the curing cycle, it is important to investigate the changes which take place during the thermal degradation of these materials when a change on the sequence of time and temperature is introduced during the curing reaction. In this work, the thermal degradation of two epoxy systems diglycidyl ether of bisphenol A (BADGE n=0)/1, 2 diamine cyclohexane (DCH) cured through different sequences of time and temperature was studied by thermogravimetric analysis in order to determine the reaction mechanism of the degradation processes, and also to check the influence of the curing cycle on this mechanism. Values obtained using different kinetic methods were compared to the value obtained by Kissinger's method (differential method which do not require a knowledge of the n-order reaction mechanism), and to that obtained through Flynn-Wall-Ozawa method in a previous work. 2006 Akadémiai Kiadó.
Keywords
activation energy; curing cycle epoxy resins; reaction mechanisms; thermogravimetry
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