PMMA接枝纳米ZnO复合粒子改性PVC塑料性能研究

Properties of PVC Modified by PMMA Grafted ZnO Nanoparticles

通过原位聚合将甲基丙烯酸甲酯(MMA)接枝于纳米 ZnO 表面,制备了聚甲基丙烯酸甲酯(PMMA)接枝纳米 ZnO 复合粒子,将其加入聚氯乙烯(PVC)基体中进行改性。研究了纳米 ZnO 粒子在 PVC 基体中的分散性和 PVC复合材料的力学性能,探讨了改性纳米 ZnO 粒子填充 PVC 材料的抗紫外线性能。结果表明,改性后的纳米 ZnO 粒子在 PVC 基体中分散均匀,提高了纳米 ZnO 粒子与 PVC 基体之间的相容性,使改性PVC材料的拉伸强度达到78 MPa,比纯纳米 ZnO 粒子改性 PVC 提高了35%;冲击强度提高了近1倍,达到13.6 kJ/m^2;加入改性纳米 ZnO 粒子的 PVC 还具有明显的吸收紫外线功能。

ZnO nanoparticles were in-situ grafted with PMMA from the surface and used as a modifier for PVC. Such ZnO nanoparticles were homogeneously dispersed in the PVC matrix. Filled with PMMA grafted ZnO nanoparticles, PVC composites possessed a tensile strength of 78 MPa, which was 35 % higher than that based on untreated ZnO; and an impact strength 13.6 kJ/m^2, twice as untreated case. In addition, PMMA grafted ZnO nanoparticles imparted PVC a perfect UV-shielding property.