注塑条件对长玻纤增强聚丙烯性能影响研究  

Study on Influence of Injection Process on Long Glass Fiber Reinforced PP

作　　者：卢桂阳 李瑶 许广业 

机构地区：[1]三一重工股份有限公司泵送研究本院,长沙410100

出　　处：《工程塑料应用》2012年第7期46-49,共4页Engineering Plastics Application

摘　　要：利用熔融浸渍装置,采用长玻纤(LGF)增强双马来酰亚胺等改性的聚丙烯(PP),制备了LGF增强PP复合材料。研究了在螺杆转速为80～250 r/min、背压为8～10 MPa的注塑条件下,复合材料的纤维长度、力学性能与热变形温度的变化。在研究范围内,注塑工艺参数的变化对复合材料的弯曲强度和热变形温度没有明显的影响,但随着螺杆转速的提高,纤维长度下降,所得复合材料的冲击强度先降低后升高。Modified polypropylene （ PP ） with diphenylmethyene bismaleimide was reinforced with long glass fiber （ LGF ） by melting impregnating equipment. The influence of injection screw speed and pressure on the length of glass fiber, mechanical properties and heat distortion temperature （ HDT ） of LGF reinforced PP was studied. The flexural strength and HDT did not change much as molding parameters changed. However, as screw speed increased, the length of glass fiber decreased wtfile the impact strength of LGF reinforced PP firstly decreased and subseouentlv increased.

关 键 词：聚丙烯 长玻纤 螺杆转速 背压 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]