Evaluating a four-directional benzene-centered aliphatic polyamine curing agent for epoxy resins

A four-directional benzene-centered aliphatic polyamine, MXBDP, with high functionality and low volatility, is used to cure epoxy resin (DGEBA). Herein we originally report the isothermal cure kinetics and dynamic mechanical properties of DGEBA/MXBDP. Differential scanning calorimetry confirms that...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2013-10, Vol.114 (1), p.365-375
Main Authors: Wan, Jintao, Li, Cheng, Bu, Zhi-Yang, Fan, Hong, Li, Bo-Geng
Format: Article
Language:English
Subjects:
Aliphatic compounds
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Summary:A four-directional benzene-centered aliphatic polyamine, MXBDP, with high functionality and low volatility, is used to cure epoxy resin (DGEBA). Herein we originally report the isothermal cure kinetics and dynamic mechanical properties of DGEBA/MXBDP. Differential scanning calorimetry confirms that MXDBP is more reactive than commercial linear metaxylenediamine and branched Jeffamine T-403 and the isothermal curing reaction is autocatalytic. The Kamal model is found to be able to well describe the curing rate up to the onset of diffusion control, and the excellent match over the whole conversion range is achieved using the extended Kamal model. Interestingly, the isoconversional kinetic analysis indicates that the effective reaction activation energy (E I- ) changes substantially with conversion, and ultimately decreases to a very small value (
ISSN:1388-6150
1572-8943
DOI:10.1007/s10973-012-2863-8