【摘要】 为提升聚合物防尘性能，以聚丙烯（PP）为基体，聚二甲基硅氧烷（PDMS）和内添加型抗静电剂（JN-MN）为填料，通过熔融共混法制备聚丙烯/聚二甲基硅氧烷（PP/PDMS）和聚丙烯/聚二甲基硅氧烷/抗静电剂（PP/PDMS/K）防尘复合材料。采用傅里叶红外分析仪、接触角测试仪、场发射扫描电镜、万能试验机等测试复合材料，探究不同含量PDMS和抗静电剂对复合材料防尘性能、表面电阻率、结晶性能、力学性能的影响。结果表明：随着PDMS含量增加，PP/PDMS复合材料的疏水性能逐渐增强。当PDMS含量为8%时，复合材料的水接触角提升27.7%，其表面能降低7.13%。当抗静电剂含量增加，复合材料的结晶度降低，表面电阻相较于纯PP降低了5个数量级。添加3%抗静电剂已达到饱和，PP/PDMS/K复合材料除尘率提高至88.93%，拉伸强度和弯曲强度下降，但冲击韧性仍保持较高水平。更多还原

【Abstract】 In order to improve the dustproof performance of the polymer, polypropylene(PP) was used as the matrix, and polydimethylsiloxane(PDMS) and internally added antistatic agent(JN-MN) were used as fillers to prepare polypropylene/polydimethylsiloxane(PP/PDMS) and polypropylene/polydimethylsiloxane/antistatic agent(PP/PDMS/K) dustproof composites by melt blending. The composite was tested by Fourier infrared analyzer, contact angle tester, field emission scanning electron microscope and universal testing machine. The effects of different content of PDMS and antistatic agents on the dustproof properties, surface resistivity, crystallization properties and mechanical properties of the composites were investigated. The results show that with the increase of PDMS content, the hydrophobic properties of PP/PDMS composites gradually increase. When the PDMS content is 8%, the water contact angle of the composite increases by 27.7%, and the surface energy decreases by 7.13%. When the content of antistatic agent increases, the crystallinity of the composites decreases, and the surface resistivity decreases by 5 orders of magnitude compared with pure PP. Adding 3% antistatic agent has reached saturation, the dust removal rate of PP/PDMS/K composite increases to 88.93%, the tensile strength and bending strength decrease, but the impact toughness still maintains a high level.更多还原