不同抗静电剂对聚丙烯抗静电性能和力学性能的影响

Effects of Antistatic Agents on Antistatic and Mechanical Properties of Polypropylene

通过熔融共混法制备不同配比的多元醇脂肪类抗静电剂、磺酸类抗静电剂改性聚丙烯(PP)抗静电材料;分别考察了两种抗静电材料的体积电阻率、表面电阻率、拉伸强度、冲击强度和表面硬度。结果表明:两种抗静电剂的加入都能够降低PP的表面电阻率,起到抗静电效果,而多元醇脂肪类抗静电剂的效果要比磺酸类抗静电剂突出;两种抗静电剂对PP体积电阻率影响都不大。此外,两种抗静电剂的加入会降低PP的拉伸强度和表面硬度,对冲击强度影响不大。在PP中添加6份多元醇脂肪类抗静电剂,抗静电效果最佳,其表面电阻率为4.7×1011Ω,拉伸强度为27.28MPa,冲击强度为4.9kJ/m2,硬度为64.8。

Polyol aliphatic and sulfoacid antistatic agents were introduced into polypropylene （PP） and their effects on antistatic and mechanical property of PP were studied. It showed that both antistatics could reduce the surface resistivity of PP but not the volume resistivity. The tensile strength and surface hardness of PP were decreased by either antistatic, however, the impact strength was little affected. Generally, polyol aliphatic antistatic agent was better than sulfoacid. When the content of the former was 6%, surface resistivity of 4. 7×10^11Ω, tensile strength of 27. 28 MPa, impact strength of 4. 9 kJ/m2,hardness of 64. 8, were observed.