Application of Liquid Isoprene Rubber in Motorcycle Snow Tire Tread Compound
The application of liquid isoprene rubber(LIR)as a replacement for environmentally friendly aromatic oil in motorcycle snow tire tread compounds was studied.The results showed that compared with environmentally friendly aromatic oil compound,the Mooney viscosity of the LIR compound was increased,the vulcanization characteristics were equivalent,the hardness was higher at room temperature but lower at low temperature,modulus at 100％and 300％elongation,tensile strength,wear resistance and tear strength were generally improved,snow grip was increased,and the rolling resistance was reduced.The durability and high-speed performance of the finished tire were equivalent,and the rolling resistance was reduced.The tread block of the finished tire in the low-temperature road test in northeast China had lower hardness and better wear resistance.The finished tires with LIR/environmentally friendly aromatic oil dosage ratios of 25/0 and 20/5 as tread compound had better snow grip and did not slip during driving.In general,replacing environmentally friendly aromatic oil with LIR in the tread compound of motorcycle snow tires can address the issue of increased hardness at low temperatures,enhance grip and wear resistance,and reduce the rolling resistance.
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