抗静电半硬质PVC材料的制备及性能

通过SEM、拉伸断裂行为、表面电阻、DMA(动态热机械分析)和维卡软化温度测试,研究了半硬质PVC/炭黑(CB)材料力学性能、电性能、热性能和微观形态。结果表明:随着炭黑添加量增加,PVC/CB的导电性能和拉伸强度提高,而体系的断裂伸长率降低。当炭黑添加量仅为4份时,PVC/CB即有逾渗现象发生,表面电阻大幅度降低。当炭黑的添加量为7份时,材料的表面电阻降至1×105Ω,即可满足矿山材料抗静电的要求,而材料的综合力学性能良好。炭黑可使PVC材料的玻璃化转变温度向高温区域移动,材料的耐热性能提高。

Study on Preparation and Properties of Antistatic Semi-Rigid Polyvinyl Chloride(PVC) Materials

Semi-rigid polyvinyl chlorid (PVC)/carbon black(CB)composites were prepared, their properties were studied by SEM, stress-strain behavious, surface resistivity,DMA and Vica soften temperature tests. The results indicated that with the increasing of CB , the electrical property and tensile strength of PVC/CB improve, the elongation at break decrease. The percolation threshold of surface resistivity of PVC/CB composite appears when the addition of CB reaches 4phr. As CB content is 7 phr, the surface resistivity of PVC/CB reduces to 1×105Ω, It can meets the antistatic demand and has high comprehensive mechanical.The glass transition temperature of PVC materials shifts to a higher temperature range with CB accession, and the thermal property is enhanced.