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Investigation of the reaction mechanism of different epoxy resins using a phosphorus-based hardener

journal contribution
posted on 15.03.2006, 00:00 authored by Russell VarleyRussell Varley, W Liu, G P Simon
In this work, the fundamental kinetic and structure/property information for a novel phosphorus-based hardener, bis(4-aminophenoxy) phosphonate is cured with a range of common epoxy resins such as diglycidyl ether of bisphenol A, tri glycidyl p-amino phenol and tetra glycidyl diamino diphenyl methane (TGDDM) at various cure temperatures. The rate coefficients k 1 and k 2 for the primary and secondary amine epoxide addition reactions, respectively, were determined and were found to exhibit a positive substitution effect for the TGAP and TGDDM epoxy resins. Etherification or internal cyclization were shown to be important at higher levels of cure conversion, with these reactions being more significant for the TGAP/BAPP system. Some basic structure/property relationships were established between the glass transition temperature (T g ) and epoxide conversion. The master curve obtained for the superimposition of the various cure temperatures for each epoxy demonstrated the independence of the cure mechanism with temperature.

History

Journal

Journal of applied polymer science

Volume

99

Issue

6

Pagination

3288 - 3299

Publisher

Wiley-Blackwell

Location

London, Eng.

ISSN

0021-8995

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2006, Wiley Periodicals