Abstract
Mechanochemically partially devulcanized ground rubber tire (GRT) was revulcanized in composition with virgin styrene butadiene rubber (SBR). Reclaiming of GRT was carried out by tetra methyl thiuram disulfide (TMTD) in presence of spindle oil. The cure characteristics and tensile properties of SBR compounds were investigated. Results indicate that the minimum torque and Mooney viscosity of the SBR compounds increase with increasing reclaim rubber (RR) loading whereas the scorch time remain unaltered but optimum cure time exhibit a decreasing trend. Increasing RR loading also gives SBR compounds better resistance towards swelling but the 100% modulus, 200% modulus tensile strength, and the elongation at break increases. Thermogravimetric analysis of SBR/RR vulcanizates was carried out in order to get thermal stability of the vulcanizates. Scanning electron microscopy (SEM) studies further indicate the coherency and homogeneity in the SBR/RR vulcanizates.
Highlights
Dwindling source and rising price of crude oil have become a serious concern for availability of feed stock to the synthetic rubber industry
Thermo Gravimetric Analysis (TGA) shows that the thermal stability of the vulcanizate increases with increasing reclaim rubber content
This paper describes a new elastomer products based on virgin styrene butadiene rubber (SBR) and reclaimed ground rubber tire (GRT)
Summary
Dwindling source and rising price of crude oil have become a serious concern for availability of feed stock to the synthetic rubber industry. Huge quantities of rubbers are used in tire industry and the world’s rubber markets are dominated by two rubbers – one being natural rubber (NR) and the other being styrene butadiene rubber (SBR). Tire industry consumed largest quantity of SBR which is mainly used in car tire tread. The entire amount of rubber from the worn-out tires is discarded, which again require very long time for environmental degradation due to cross- link structure of rubbers. Various approaches such as land filling [1], incineration [2], pyrolysis [3,4], civil engineering [5,6] applications etc. In almost all the applications no value is added from the product side
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