The kinetics of model reactions of curing epoxy resins with amines |
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| Affiliation: | 1. Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan;2. Department of Organic Materials Science, Graduate School of Organic Materials Science, Yamagata University, 4-3-16, Jonan, Yonezawa 992-8510, Japan;1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2. CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China;1. Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089-0241, USA;2. Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA, 90089-1453, USA |
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| Abstract: | The isothermal course of the reaction of phenylglycidyl ether and N,N-methylglycidylaniline with dibutyl amine at various temperatures was investigated DSC. The data were treated on the basis of a reaction scheme with two processes in parallel, one of them auto-catalyzed. A good fit with the experiment was reached only when the order of both processes with respect to amine had been reduced to half its original value. An assumption that the kinetics of the amine-epoxy resin rection are considerably affected by the formation of various complexes through hydrogen bonds may be an explanation. A simple mathematical model has been suggested to estimate this influence. Because of the relatively high heats of interaction for the formation of complexes, the dependence of the measured heat on the degree of conversion is not linear. The magnitude of the error caused by neglecting this fact in investigation of the kinetics by DSC has been estimated. |
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