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Studies on blends of epoxy-functionalized hyperbranched polymer and epoxy resin

journal contribution
posted on 01.01.2003, 00:00 authored by D Ratna, Russell VarleyRussell Varley, R K Singh Raman, G P Simon
An epoxy-functionalized hyperbranched polymer (HBP) was used to toughen a conventional epoxy resin, diglycidyl ether of bisphenol A (DGEBA) cured with diethyltoluene-2,6-diamine (DETDA). There was little change in gel time as a result of addition of HBP, even though the HBP reacts at a slower rate with amine hardeners compared to DGEBA alone. Phase separation was investigated for various HBP contents and as a function of cure conditions as well. The thermal and dynamic viscoelastic behavior of the modified matrices have been examined and compared to the DGEBA epoxy matrix. It appears that the HBP which phase separates does not react as fully as when it is reacted with the amine alone. Nonetheless, good improvement in impact strength as a result of incorporation of HBP were observed and explained in terms of morphological behavior for a DGEBA matrix modified with various amounts of HBP.

History

Journal

Journal of materials science

Volume

38

Issue

1

Pagination

147 - 154

Publisher

Springer

Location

Berlin, Germany

ISSN

0022-2461

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2003, Kluwer Academic Publishers