丁基橡胶/聚丙烯动态硫化热塑性弹性体的制备和性能研究

The Preparation and Performance Research of Butyl Rubber/Polypropylene Dynamic Vulcanized Thermoplastic Elastomer

以丁基橡胶(IIR)和聚丙烯(PP)为基体材料,利用动态硫化的方法制备了丁基橡胶/聚丙烯热塑性弹性体(IIR/PP TPV),主要研究了硫化剂用量和制备工艺参数对IIR/PP TPV力学性能和动态力学性能的影响。结果表明,随着硫化剂用量的增加,IIR/PP TPV的力学性能得到提高,硫化剂用量为9 phr时,IIR/PP TPV的综合性能优异;动态硫化温度为180℃时,IIR/PP TPV有优异的力学性能和阻尼性能;随着动态硫化时间的增加,拉伸强度呈现先增加后减小而断裂伸长率呈现逐渐增大的趋势,硫化时间超过10 min之后,IIR/PP TPV的阻尼性能开始下降,当硫化时间为10 min时,IIR/PP TPV的力学性能和动态力学性能优异。

The isobutylene isoprene rubber/polypropylene( IIR/PP) thermoplastic vulcanizate was produced by dynamic vulcanization method using IIR and PP as the basic material. The effects of curing agent and the preparation of process parameters on the mechanical property and dynamic mechanical properties of IIR/PP TPV was investigated. The results show that as the increase of content of curing agent, the mechanical properties of IIR/PP TPV could be improved. When the curing agent is 9 phr,the blending system has excellent combination properties. When the dynamic vulcanization temperature is 180 ℃,IIR/PP TPV could provide excellent mechanical properties and damping performance. As the increase of dynamic vulcanization time,the tensile strength could increase firstly and decrease later,and the elongation at break shows a gradual increasing trend. After the curing time is more than 10 min,the damping performance of IIR/PP TPV begins to decline. IIR/PP TPV has the best mechanical properties and dynamic mechanical properties when the curing time is 10 min.