充油体系对充电桩用热塑性弹性体电缆料力学性能的影响

Effect of Oil Filled System on Mechanical Property of Thermoplastic Elastomer Cable Material for Charging Pile

研究不同分子量的氢化-苯乙烯-丁二烯共聚物(SEBS)、不同黏度的白油以及不同充油放置时间对充电桩用热塑性弹性体(TPE)电缆料的加工性能和力学性能的影响,采用扫描电子显微镜(SEM)观察不同充油放置时间的材料表面形貌。结果表明:随着SEBS分子量的增加,材料的力学性能提高,但加工扭矩增大;随着白油黏度的提高,材料的加工性能降低,力学性能提高,其中添加运动黏度为68 m2/s的白油的试样力学性能最佳;随着充油放置时间的延长,材料表面逐渐变得平整,材料撕裂强度等力学性能先升高后降低,其中充油放置时间为8 h时,材料性能最佳。

The effects of SEBS with different molecular weight, white oil with different viscosity, and different standing time on the processing and mechanical properties of thermoplastic elastomer （TPE） cable material for charging pile were studied. The surface morphologies of the materials with different standing time were observed by scanning electronic microscope （SEM）. The results show that with the increase of SEBS molecular weight, the mechanical property as well as processing torque of the material increase. With the increase of white oil viscosity, the process property of the material decreases, while the mechanical properties increase and reach the maximum value when the dynamic viscosity is 68 m2/s. With the prolonging of standing time, the surface of the material become smoother, the tear strength and mechanical properties of the material increase at first and then decrease, the material possess the optimum performances when the standing time is 8 h.