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Assessment of cyclization and network defects in glycidylamine‐based epoxy networks by selective degradation
Author(s) -
Stutz Herbert,
Tesch Helmut
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12972
Subject(s) - epoxy , oligomer , degradation (telecommunications) , hydrolysis , polymer chemistry , materials science , derivative (finance) , chemistry , organic chemistry , composite material , computer science , telecommunications , financial economics , economics
A special model system based on trimethylene glycol di( p ‐aminobenzoate) and its glycidyl derivative was evaluated to study the extent of cyclization in glycidylamine epoxies. The cured resins were degraded by alkaline hydrolysis, which left the cycles unaffected. The cycle concentration obtained by high‐performance liquid chromatography was 15%. The oligomer distribution of the degradation products strongly indicated that up to 40% of the epoxy groups were lost to side reactions, and this resulted in a large number of structural defects in the network. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3951–3956, 2003