聚丙烯固相接枝苯乙烯和丙烯酸乙酯的研究

Solid State Grafting Polymerization of Styrene and Ethyl Acrylate onto Polypropylene

用固相接枝共聚方法制备聚丙烯 (PP)接枝聚苯乙烯 (PP g PS)和聚丙烯接枝聚丙烯酸乙酯 (PP g PEA) ,考察了引发剂浓度、反应温度、反应时间与单体种类对接枝反应的影响 ,对接枝改性的PP进行结构和热分析表征 ,并用接枝功能化的聚丙烯做增容剂 ,研究了其对纳米SiO2 /PP复合材料力学性能的影响。力学性能研究表明 :低含量接枝聚丙烯的存在可使SiO2 /PP复合材料的韧性大幅提高。

Polypropylene (PP) grafted polystyrene (PP-g-PS) and polypropylene grafted poly(ethyl acrylate) (PP-g-PEA) were prepared by solid state grafting polymerization. The effects of initiator concentration, reaction temperature, reaction time and monomer type on percentage grafting and grafting efficiency were examined. The structure and thermal behavior of the grafted polypropylene were also characterized. The result of mechanical properties analysis shows that the toughness of nanosilica/polypropylene composites can be greatly improved by adding low content PP-c-PS.