Application of Liquid Diene Rubber in NR/SBR Tread Compound
Four types of liquid diene rubber and environmentally friendly aromatic oil(TDAE)were used as plasticizers,and their application in natural rubber(NR)/styrene butadiene rubber(SBR)tread compound was studied and compared.The results showed that,the processing flow ability of the compounds with liquid rubbers was slightly worse than that of the compound with TDAE,the scorch time and the optimum cure time of the compounds with liquid rubber were slightly prolonged.Compared with the vulcanizate with TDAE,the tensile stress,tear strength,rebound value and wear resistance of the vulcanizates with liquid rubbers were improved,and the anti-flexural fatigue crack initiation properties and heat air aging resistance were reduced.The vulcanizate with liquid poly-isoprene rubber LIR-50 had the highest tensile strength and rebound value,the best anti-compression fatigue properties and 6th-grade crack flexural fatigue resistance,and the lowest rolling resistance.The vulcanizate with liquid poly-butadiene rubber LBR-305 had the best wear resistance.The comprehensive physical properties of the vulcanizate with liquid poly-butadiene-isoprene rubber LBIR-390 were between those of the vulcanizates with liquid poly-isoprene rubber LIR-50 and liquid poly-butadiene rubber LBR-305.The vulcanizate with liquid poly-styrene-butadiene rubber LSBR-820 had the best tear resistance but the worst flexural fatigue resistance.
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