P(MMA-MA)/OMMT纳米复合材料对PVC共混改性研究

通讨原位插层法制备聚(甲苯丙烯酸甲酯一丙烯酸甲酯)有机化蒙脱十「P(MMA-MA)/OMMT}纳米复合材料，并用其对聚氯乙烯(PVC)讲行共混改性。通讨扫描电镜(SEM)热失重分析(TGA)、动杰力学分析(DMA)拉伸和冲击等力学性能测试研究了共混物的两相相容性、热稳定性及力学性能。结果表明:共混体系两相间有很奸的相容性;随着纳米复合材料添加量的增加，共混体系的耐热性能、储能模量、玻璃化温度和力学性能逐渐增加。当纳米复合材料与PVC共混比达到20/100时，共混体系在10%失重率下的失重温度比纯PVC捍高了17.4℃，玻璃化温度比纯PVC捍高了4.7℃。当纳米复合材料与PVC共混比达到30/100时，体系的综合力学性能最奸，冲击强度和拉伸强度分别较纯PVC捍高了21. 1%和34.7%。

Study on the Blending Modification of PVC with P(MMA-MA)/OMMT Nanocomposites

Poly(methylmethacrylate/methylacrylate)/organ-montmorillonitc(P(MMn-Mn)/OMMT)nanocompositcs were used to modify poly(vinyl chloride)(PVC)by blending. The compatibility，thermal stability，the dynamical mechanical，tensile and impact properties of the compound were investigated by scanning electron microscope(SEM)，thcrmogravimctric analysis (TGA)，dynamic mechanical thermal analysis(DMA)， tensile and impact test. P(MMA-MA)/OMMT nanocompositcs and PVC exhibited good compatibility，the thermal stability, storage modules，glass transition temperature，and mechanical properties of the composites increased with increasing of nanocompositc content. When the mass ratio of the nanocompositcs and PVC was 20/100，the temperatures of 10%weight loss and glass transition increased by 17. 4℃and 4. 7 ℃ based on neat PVC. The addition of the nanocompositcs also improved the mechanical properties of PVC. The compound showed a set of optimal mechanical properties when the mass ratio of the nanocompositcs and PVC was 30/100，with the tensile and the impact strength being enhanced by 34. 7%and 21.1%，respectively，compared with neat PVC.