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Properties of elastomers crosslinked by bisglycidyl ether of 2,2‐bis( p ‐hydroxyphenyl)‐1,1,1‐trichloroethane
Author(s) -
Brzozowski Zbigniew K.,
Gajewski Mieczysław,
Brzeziński Zdzisław
Publication year - 1977
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.1977.070210706
Subject(s) - vulcanization , acrylonitrile , materials science , ether , elastomer , polymer chemistry , natural rubber , elongation , swelling , glass transition , activation energy , epoxy , sulfur , styrene butadiene , styrene , polymer , composite material , chemistry , organic chemistry , ultimate tensile strength , copolymer , metallurgy
Chlorobisphenolic epoxy resins in crystalline form, e.g., bisglycidyl ether of 2,2‐bis( p ‐hydroxyphenyl)‐1,1,1‐trichloroethane (BGECBP) and the system sulfur–N‐cyclohexyl‐2‐benzothiazolesulfonamide were used as crosslinking agents for vulcanization of butadiene–styrene and butadiene–acrylonitrile rubber. The density of crosslinking was determined by the equilibrium swelling method and on the basis of the Mooney‐Rivlin equation which gives the relation between stress and elongation. The dynamic properties, namely, G ′ and G ″ and mechanical loss factor δ, were determined. On the basis of these results, mechanisms for the crosslinking reaction were advanced, the activation energy was determined, and comparisons between crosslinking rates by different systems were made. It was found that vulcanizates crosslinked by BGECBP possess higher heat aging resistance and lower glass transition temperatures in comparison with those crosslinked by means of sulfur in the presence of N ‐cyclohexyl‐2‐benzothiazolesulfonamide.