作　　者： ; ; ; ;

机构地区： 华南理工大学化学与化工学院化学工程研究所

出　　处： 《高校化学工程学报》 2006年第1期109-114,共6页

摘　　要： 用双螺杆挤出机研究了加入助剂和不加助剂的马来酸酐(MAH))和苯乙烯(St)对聚丙烯(PP)的熔融接枝改性。采用正交试验优化了熔融接枝工艺条件。系统研究了单体MAH、St,引发剂过氧化二异丙苯(DCP)和助剂——一种硫代酸酯(AB)用量对MAH接枝率的影响,并对其影响因素作了分析。用FTIR表征了产物结构。分析了助剂AB抑制PP降解的机理。研究表明AB助剂不仅能降低PP降解,同时也提高了MAH的接枝率。得出较佳的工艺条件为:反应挤出温度T1=190℃,T2=190℃,停留时间t=2.5min,转速r=100r·min-1,较佳的原料质量配比为m(PP):m(MAH):m(St):m(DCP):m(AB)=100:8:3:0.5:0.5。 Polypropylene （PP） modified by means of melt grafting with maleic anhydride （MAH） and styrene （St） was studied by a double-screw extruder under the conditions of adding the assistant and without any assistant respectively. The conditions for melt-grafting MAH and St onto PP were optimized by orthogonal experiments. The influences of amounts of MAH, St, DCP and a kind of assistant sulfo-acid ester （AB） on the grafting ratio were investigated and other influential factors were analyzed. Structure of the products was characterized by FTIR. The degradation mechanism of PP restrained by the assistant AB was analyzed. The experimental results show that the assistant AB could reduce the degradation of PP and improve the grafting ratio of MAH. The optimized process conditions obtained by orthogonal experiments are as following： extrusion temperature Tl = 190℃, T2=190℃, residence time t=2.5 min, rotational speed r=100r·min^-1, and mass ratio m（PP）：m（MAH）：m（St）：m（DCP）： m（AB）=100：8：3：0.5：0.5.

关 键 词： 聚丙烯 马来酸酐 苯乙烯 助剂 降解机理 熔融接枝

领　　域： [化学工程] [化学工程]