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Curing characteristics and mechanical properties of vinyltriethoxysilane‐coupled carbon black/styrene–butadiene rubber vulcanizates
Author(s) -
Rana S. K.
Publication year - 1998
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(19980829)69:9<1719::aid-app5>3.0.co;2-e
Subject(s) - natural rubber , materials science , curing (chemistry) , ultimate tensile strength , carbon black , composite material , styrene butadiene , vinyltriethoxysilane , scanning electron microscope , elongation , styrene , copolymer , polymer , silane
Styrene–butadiene rubber (SBR) vulcanizates containing 0 to 2.73 parts of vinyltriethoxysilane (VTEOS) per hundred parts of rubber (phr) were prepared, keeping the other ingredients weight constant. The mixes were tested for their curing behavior by a curemeter. The vulcanizates were analyzed through a Universal tensile tester, fatigue‐to‐failure tester, and scanning electron microscope mainly for mechanical properties and correlation. An increase in induction time and decrease in cure time, each by 10%, was noticed by the incorporation of 2.73 phr of VTEOS. The tensile strength and elongation at break improved significantly up to 0.5 phr of VTEOS and either a small improvement or deterioration of these properties was observed beyond this concentration of VTEOS. The fatigue‐to‐failure cycle at four extension ratios showed a gradual and appreciable improvement. It is noteworthy to mention that the vulcanizate containing 2.73 phr VTEOS possessed about a threefold increase in the fatigue‐to‐failure cycle compared to its non‐VTEOS vulcanizate. However, this distinction of the fatigue‐to‐failure cycle progressively decreased with increase in the extension ratios. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 1719–1725, 1998