Abstract

In this paper, the graft copolymer PVC-g-PMMA composed of PVC main chain and PMMA side chain is synthesized by atom transfer radical polymerization. And it is added to the polyvinyl chloride/nitrile rubber (PVC/NBR) to prepare the PVC/NBR/PVC-g-PMMA composite film. The effects of PVC-g-PMMA on the mechanical properties, heat-resistant oxygen aging properties and thermal stability of PVC/NBR composite film are investigated. The mechanical performance test results show that after adding PVC-g-PMMA, the mechanical properties of the PVC/NBR composite film is improved. The tensile strength increases by 20.13%, and the elongation at break increases by 14.28%. The test results of heat-resistant oxygen aging performance indicate that after 96 hours of aging, the tensile strength of the PVC/NBR/PVC-g-PMMA composite film increases by 4.88% compared with the PVC/NBR composite film. The thermal stability test results illustrate that after adding PVC-g-PMMA, the residual weight of the PVC/NBR composite film increases by 0.7%, and the maximum thermal decomposition rate reduces by 0.12%/°C. It shows that PVC-g-PMMA not only improves the mechanical properties, thermal stability and aging resistance of PVC/NBR composites, but also enhances the market competitiveness of PVC/NBR composites. It expands the application of PVC/NBR composite materials in the field of decoration and protective coatings.

摘要

本文采用原子转移自由基聚合法合成了由PVC主链和PMMA侧链组成的接枝共聚物PVC-g-PMMA。并加入到聚氯乙烯/丁腈橡胶（PVC/NBR）中制备PVC/NBR/PVC-g-PMMA复合薄膜。研究了PVC-g-PMMA对PVC/NBR复合薄膜力学性能、耐热氧老化性能和热稳定性的影响。力学性能测试结果表明，加入PVC-g-PMMA后，PVC/NBR复合膜的力学性能得到改善。抗拉强度提高20.13%，断裂伸长率提高14.28%。耐热氧老化性能测试结果表明，PVC/NBR/PVC-g-PMMA复合薄膜经96小时老化后拉伸强度提高4倍。88% 与PVC/NBR 复合膜相比。热稳定性测试结果表明，加入PVC-g-PMMA后，PVC/NBR复合膜的残余重量增加0.7%，最大热分解率降低0.12%/℃。说明PVC-g-PMMA不仅提高了PVC/NBR复合材料的力学性能、热稳定性和耐老化性，而且增强了PVC/NBR复合材料的市场竞争力。拓展了PVC/NBR复合材料在装饰和防护涂料领域的应用。说明PVC-g-PMMA不仅提高了PVC/NBR复合材料的力学性能、热稳定性和耐老化性，而且增强了PVC/NBR复合材料的市场竞争力。拓展了PVC/NBR复合材料在装饰和防护涂料领域的应用。说明PVC-g-PMMA不仅提高了PVC/NBR复合材料的力学性能、热稳定性和耐老化性，而且增强了PVC/NBR复合材料的市场竞争力。拓展了PVC/NBR复合材料在装饰和防护涂料领域的应用。