聚合后期加入纳米复合材料制备改性PVC树脂

在纳米水滑石（HT）表面共聚适量的丙烯酸六氟丁酯（HfA）和甲基丙烯酸甲酯（MMA），制得HfA／MMA／HT纳米复合材料（以下简称纳米复合材料），并对纳米复合材料的组成进行了优化；还研究了VCM聚合时纳米复合材料的用量对试样热稳定性和抑烟性能的影响。结果表明：①不同HfA、MMA含量的纳米复合材料均能提高试样的冲击强...

Preparation of modified PVC resins by adding nanocomposites in the later polymerization phase

Through copolymerization of appropriate amount of hexafluorobutyl acrylatc （HfA） and methyl methacrylate （MMA） on the surface of nanohydrotalcite （HT）, HfA/MMA/HT nano- composites （hereinafter referred to nanocomposites） were prepared. The composition of the nanocomposites were optimized, and influences of nanocomposites dosages on the thermal stability and smoke suppression property of samples during VCM polymerization were also studied. The results show that： （1） the nanocomposites with different contents of HfA and MMA could all improve the impact strength of samples and the melt index of PVC dry blends, and the best smoke suppression property could be obtained while the content of lirA and MMA is 2 wt% and 5 wt% ,resp. （2） samples with the best thermal stability and smoke suppression property are obtained while the content of the nanocomposites in modified PVC dry blends is 5 wt%.