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Strength of filled rubbers: Temperature, rate, and oxygen effects
Author(s) -
Bueche F.
Publication year - 1963
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.1963.070070329
Subject(s) - vulcanization , ultimate tensile strength , materials science , oxygen , sulfur , composite material , peroxide , activation energy , natural rubber , chemistry , metallurgy , organic chemistry
The time taken to break under fixed load has been measured for three SBR–filler systems. Two SBR–HAF black systems were used, one vulcanized with sulfur and the other with dicumyl peroxide; the third system was an SBR–silica formulation. Measurements at several temperatures between 30 and 100°C. allowed the computation of an activation energy for the breaking process: 45 kcal./mole for all three systems. By measuring the tensile strength of the filled stock in air and vacuum at various temperatures, it was shown that the presence of oxygen seriously decreases the strength of the filled stock at high temperatures, an effect not present in the gum stock or in silicasilicone stocks.