不同直径单壁碳纳米管增强丁腈橡胶/聚氯乙烯复合体系的分子动力学模拟

Molecular dynamics simulation of NBR/PVC composite systems reinforced by single walled carbon nanotubes with different diameter

采用丁腈橡胶(NBR)与聚氯乙烯(PVC)橡塑共混的方法制备了NBR/PVC复合材料,将不同直径的单壁碳纳米管(SWCNTs)填充在NBR/PVC复合体系中制得SWCNTs增强的NBR/PVC复合材料,使用Material Studio软件构建NBR/PVC和不同直径的SWCNTs增强NBR/PVC复合体系的无定形分子模型,对所得4种复合体系进行力学性能与摩擦性能的计算,并将所得计算结果进行对比分析。结果表明,加入SWCNTs进行增强后,复合体系的弹性模量、硬度、韧性都得到了一定的提升,而摩擦系数和磨损量均下降;在外力的作用下,表面材料不易脱落,复合体系的耐磨性能得到了提升,进而延长了定子橡胶的使用寿命。

Nitrile rubber(NBR)/polyvinyl chloride(PVC)composite systems reinforced by single walled carbon nanotubes(SWCNTs)were prepared by the addition of SWCNTs with different diameters to NBR/PVC composite system,which was prepared by blending method of nitrile rubber and polyvinyl chloride.The amorphous molecular models of NBR/PVC and NBR/PVC composite systems reinforced by SWCNTs with different diameters were constructed by Material Studio software,and the mechanical and friction properties of four kinds of composite systems were calculated,and the calculation results were compared and analyzed.The results showed that the elastic modulus,hardness and toughness of the composite systems reinforced by SWCNTs were improved to a certain extent except that the friction coefficient and wear loss were decreased.Under the action of external force,the surface material was not easy to fall off,the wear resistance of the composite system was improved,and the service life of the stator rubber was extended.