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Dynamic mechanical properties of epoxy–rubber polyblends
Author(s) -
Kalfoglou Nikos K.,
Williams H. Leverne
Publication year - 1973
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.1973.070170506
Subject(s) - epoxy , diglycidyl ether , materials science , composite material , elastomer , acrylonitrile , volume fraction , phase (matter) , natural rubber , nitrile rubber , ultimate tensile strength , dynamic mechanical analysis , copolymer , relaxation (psychology) , bisphenol a , izod impact strength test , polymer , chemistry , psychology , social psychology , organic chemistry
The dynamic mechanical properties of the epoxy resin of the diglycidyl ether of bisphenol A cured with varying amounts of a carboxyl‐terminated butadiene–acrylonitrile copolymer were determined. Isochronal measurements were made between −90° to 170°C for eight compositions. Mechanical relaxations indicate the degree of interaction and the state of mixing of the two‐phase system. Phase reversal occurs at a volume fraction of 0.5, where an intermediate compound is formed. In the low concentration range of the elastomeric phase, the impact strength improvement correlates well with an increase in the energy absorption of the relaxation. The known morphology of the system at this composition range allowed testing of various phenomenological mechanics models proposed to calculate the tensile properties of composite systems.