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Synthesis of tri-aryl ether epoxy resin isomers and their cure with diamino diphenyl sulphone

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journal contribution
posted on 15.05.2020, 00:00 authored by Larry Reyes, Jane ZhangJane Zhang, Buu Dao, Russell VarleyRussell Varley
The synthesis of bi‐ and tetra‐functional tri‐aryl ether epoxy resin isomers and their subsequent cure with 44 diamino diphenyl sulphone (DDS) is presented here. The effect of varying aromatic substitution and cross‐link density on the structure, property, and processing relationships is explored for 1,3 bis(3‐glycidyloxyphenoxy)benzene (133 BGOPB), 1,4 bis(4‐glycidyloxyphenoxy)benzene (144 BGOPB), N,N,N,N‐tetraglycidyl 1,3‐bis (3‐aminophenoxy) benzene (133 TGAPB), and N,N,N,N‐tetraglycidyl 1,4‐bis (4‐aminophenoxy) benzene (144 TGAPB). Meta substitution to the aromatic ring reduces the rate of reaction, glass transition temperature, yield strain and crosslink density, coefficient of thermal expansion, and side reactions, while increasing strain softening, compressive modulus and strength, and methyl ethyl ketone ingress. Increasing crosslink density increases the glass transition temperature, promotes side reactions during cure, and increases compressive modulus, strength, and yield strain, while reducing coefficients of thermal expansion, methyl ethyl ketone ingress, and density. The results are discussed in terms of packing efficiency of the meta‐substituted epoxy resins and the role of short range molecular mobility caused by the lack of an aromatic axis of rotation.

History

Journal

Journal of Polymer Science

Volume

58

Issue

10

Pagination

1410 - 1425

Publisher

Wiley

Location

Hoboken, N.J.

ISSN

2642-4150

eISSN

2642-4169

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2020, Wiley Periodicals, Inc.