Effect of Relative Molecular Weight of NR on Properties of Carcass Compound of Truck and Bus Radial Tire and Its Rapid Characterization Method Evaluation
The effect of relative molecular weight of natural rubber(NR)on the properties of the carcass compound of truck and bus radial tires was studied,and different methods were used to characterize the relative molecular weight of NR.The results showed that the relative molecular weight of NR was positively correlated with the Mooney viscosity of the compound,and negatively correlated with the Mooney scorch time and tackiness of the compound.The comprehensive physical properties of RSS3 vulcanizate were the best,while the comprehensive physical properties of 10# standard vulcanizate were the worst.There was a strong correlation between the relative molecular weight of NR within a certain range and the H extraction force of the vulcanizate.The initial plasticity value and Mooney viscosity of NR could only roughly represent the relative molecular weight of NR,while complex viscosity could effectively represent the relative molecular weight of NR.
NRrelative molecular weighttruck and bus radial tirecarcass compoundtackinessdynamic mechanical property
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