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Using PA11 and 12 as curing agents for epoxy networks: Influence of reactivity on miscibility and properties
Author(s) -
Len Paula,
Espuche E.,
Sautereau H.,
Valot E.
Publication year - 2000
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/(sici)1097-4628(20000725)77:4<857::aid-app20>3.0.co;2-e
Subject(s) - miscibility , prepolymer , epoxy , materials science , dynamic mechanical analysis , glass transition , curing (chemistry) , elastomer , polymer chemistry , ether , composite material , chemical engineering , polyurethane , chemistry , polymer , organic chemistry , engineering
Abstract The Rilsan PA11 prepolymer was evaluated as a curing agent of a diepoxy prepolymer (DGEBA). The miscibility, the glass transition temperature, and the melting of the blend were studied as a function of time at 200°C. A gelation phenomenon was evidenced by dynamic mechanical analysis and the gel time was determined at 200°C. The participation of amide groups to the reaction process at this temperature was confirmed by the study of the PA12 Orgasol®/DGEBA system and a reaction mechanism was elucidated by the study of a model system composed of ethylacetamide/phenyl glycidyl ether. The mechanical properties of DGEBA/Rilsan networks cured 7 h at 200°C were evaluated and indicate very high Young's modulus and critical stress intensity factor. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 857–865, 2000