【摘要】 使用特别设计的反应挤出机组,研究聚丙烯(PP)、马来酸酐(MA)和第二单体在过氧化二异丙苯(DCP)的引发下,各种工艺条件对聚丙烯接枝马来酸酐产品(PP-g-MA)性能的影响。结果表明,提高螺筒反应段的温度或增加螺杆转速会使产品的接枝率(G)下降;选择苯乙烯作为第二反应单体有利于提高PP-g-MA的G;增加DCP用量会使产品的G和熔体流动速率(MFR)升高。IR、DSC和化学分析都表明,PP-g-MA中游离态MA含量很低,也没有刺激性气味,说明在反应挤出机除杂段已基本把未反应的MA除去。更多还原

【Abstract】 Functionalization of polypropylene(PP) has been performed by means of melt grafting reaction of maleic anhydride(MA), initiated by dicumyl peroxide(DCP) in reactive extruder. The effect of the processing conditions on the properties of polypropylene grafted maleic anhydride product (PP-g-MA) was studied. Results show that PP-g-MA grafting degree decreases with reaction temperature or screw speed of reactive extruder increased; Styrene is the best second monomer for grafting reaction; PP-g-MA grafting degree and melt flow rate become high with DCP content increasing. It shows that the unreacted MA exists very little in PP-g-MA product and does′t affect its processing and applications.更多还原