炭黑N234和深冷精细胶粉对天然橡胶/顺丁橡胶轮胎胎面胶性能的影响

Influence of Carbon Black N234 and Cryogenic Fine Rubber Powder on Properties of Natural Rubber/Butadiene Rubber Tread Compound

研究炭黑N234和深冷精细胶粉对天然橡胶(NR)/顺丁橡胶(BR)轮胎胎面胶性能的影响。结果表明:随着炭黑N234用量增大,混炼胶的门尼粘度和硫化速率增大,硫化胶的300%定伸应力和拉伸强度增大,拉断伸长率和DIN磨耗量减小,撕裂强度、压缩生热和永久变形变化不大,耐屈挠性能提高;随着深冷精细胶粉用量增大,混炼胶的门尼粘度和硫化速率增大,硫化胶的300%定伸应力和DIN磨耗量变化不大,拉伸强度和拉断伸长率减小,撕裂强度、压缩生热和永久变形呈增大趋势,耐屈挠性能下降;深冷精细胶粉部分替代炭黑应用于轮胎胎面胶中可降低原材料成本,利于环保。

The effects of carbon black N234 and fine rubber powder prepared by cryogenic process on the properties of natural rubber（NR）/butadiene rubber（BR） tire tread compound were studied. The results showed that with the increase of the content of N234,the Mooney viscosity and the vulcanization rate of the compound increased,the modulus at 300% elongation and tensile strength of the vulcanizates increased,the elongation at break and DIN abrasion loss decreased,the tear strength,heat build-up and permanent set in flexometer test changed little,the flex resistance was improved. With the increase of the content of cryogenic fine rubber powder,the Mooney viscosity and the vulcanization rate of the compound increased,the modulus at 300% elongation and DIN abrasion loss of the vulcanizates changed little,tensile strength and elongation at break decreased,tear strength,heat build-up and permanent set in flexometer test increased,the flexure resistance decreased. By partially replacing the carbon black in the tread compound by fine rubber powder,the cost of raw materials was reduced,and the formulation and process were more environmentally friendly.