聚丙烯特性和注塑工艺对阻燃聚丙烯塑化能力影响  

Influence of Polypropylene's Characteristics and Injection Molding Process on Plasticizing Time of Retardant Polypropylene

作　　者：姜向新 陶四平 陆湛泉 

机构地区：[1]金发科技股份有限公司产品研发中心 塑料改性与加工国家工程实验室,广州510520

出　　处：《工程塑料应用》2012年第4期30-32,共3页Engineering Plastics Application

摘　　要：研究了阻燃聚丙烯(PP)分子量及其分布、不同黏度阻燃PP材料对塑化能力(塑化时间)影响;同时研究注塑过程中螺杆转速及背压变化对塑化时间的影响。结果表明,在PP材料的熔体流动速率接近时,阻燃PP重均分子量越高,分子量分布越窄,塑化时间越短;阻燃PP的黏度越高,塑化时间越短。注塑螺杆转速提高,塑化能力提高;增加注塑背压,不利于PP的塑化,不利于缩短塑化时间。The influence of different molecular weight and distribution, different viscosity of polypropylene （ PP ） on plasticizing ability （ plasticizing time ） of flame retardant PP was studied.At the same time, the influence of screw speed and back pressure changes in injection molding process on plasticizing time was also studied.The results showed that if flame retardant PP had near melt flow rate, the higher the molecular weight and the narrower the molecular weight distribution, the shorter plasticizing time was ; the higher viscosity, the shorter plasticizing time was. Increasing screw speed had benefit to improve ability of plasticizing, but increasing back pressure would be disadvantageous to plasticizing of PP.

关 键 词：阻燃聚丙烯 塑化时间 分子量及其分布 螺杆速度 背压 

分 类 号：TQ327[化学工程—合成树脂塑料工业]