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ESR study of silica‐filled SBR with different rubber/filler interactions
Author(s) -
Ito Masayoshi,
Isago Hiroyuki,
Suzuki Nozomu
Publication year - 2008
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.27843
Subject(s) - vulcanization , natural rubber , sulfur , ultimate tensile strength , materials science , composite material , styrene butadiene , carbon black , filler (materials) , electron paramagnetic resonance , carbon fibers , sulfenamide , precipitated silica , polymer , copolymer , styrene , composite number , nuclear magnetic resonance , metallurgy , physics
Silica‐filled styrene–butadiene rubber (SBR) unvulcanizates and their vulcanizates with different rubber/filler interactions were prepared by using several kinds of coupling agents. Tensile tests and electron spin resonance (ESR) measurements were carried out for both unvulcanized and vulcanized samples to get information on the effects of filler/rubber interactions on the breakdown of carbon–carbon (CC) linkages in SBR and carbon–sulfur (CSC, CSSC) linkages at the crosslinked points between rubber and sulfur by a tensile force. The combination of ESR results and stress–strain data suggested that with increasing the mechanical energy applied to the samples by the stretching, the carbon–sulfur linkages around silica particles were broken first, followed by the breakdown of carbon–sulfur and CC linkages in the rubber matrix. The assignment of ESR spectrum was also discussed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008