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Toughening of a trifunctional epoxy system part III. Kinetic and morphological study of the thermoplastic modified cure process

journal contribution
posted on 01.04.2000, 00:00 authored by Russell VarleyRussell Varley, J H Hodgkin, D G Hawthorne, G P Simon, D McCulloch
The effect of thermoplastic addition on the cure kinetics and morphology of an epoxy/amine resin were investigated using differential scanning calorimetry (d.s.c.), dynamic mechanical spectroscopy and transmission electron spectroscopy. The results obtained from d.s.c. were applied to the Arrhenius, autocatalytic and diffusion controlled different kinetic models and showed that the effect of thermoplastic addition on the rate of cure was rather modest. The cure mechanism remained broadly autocatalytic in nature regardless of PSF concentration although at higher concentrations and lower cure temperatures, the mechanism became far more diffusion controlled. The residual miscibility of the epoxy/amine and thermoplastic phases within each other, however, caused the ultimate cure conversions and the conversions at gelation and vitrification to decrease with increasing PSF content while the Arrhenius activation energy increased with increasing cure conversion with increasing PSF content.

History

Journal

Polymer

Volume

41

Issue

9

Pagination

3425 - 3436

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0032-3861

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2000, Elsevier Science Ltd.