PP/UHMWPE原位成纤复合材料的混炼及成型工艺研究  

Study on Mixing and Molding Technology of PP/UHMWPE in situ Fiber formed Composite

作　　者：杨军[1] 王迪珍[1] 李炳海[2] 王可信[2] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]青岛化工学院塑料工程系,青岛266042

出　　处：《中国塑料》1999年第11期34-38,共5页China Plastics

摘　　要：采用超高分子量聚乙烯 (UHMWPE)原位成纤增强、增韧聚丙烯 (PP)。讨论了混炼剪切力、成型冷却方式和UHMWPE熔体粘度对材料力学性能的影响。发现提高剪切力 ,加快冷却速度均有利于力学性能的提高 ,配比为 90 / 10的PP/UHMWPE的缺口冲击强度、拉伸强度和断裂伸长率可达 88 6kJ/m2 、45 1MPa和 570 % ,分别是PP 1330的 3 5倍、1 5倍和 2 5倍 ;而UHMWPE相对分子质量增加所引起的粘度上升则有损改性效果。DSC谱图发现PP 1330的乙烯嵌段与UHMWPE可形成共晶 ,淬冷则可使共晶的含量显著增加 ,从而加强了两相间的结合力。Polypropylene is toughened by in situ fiber forming reinforcing of UHMWPE .The influences of shear stress at mixing,cooling system in molding and melt viscosity of UHMWPE on mechanical properties of composites are discussed. It is found that increase of shear stress and cooling velocity may benefit the enhancement of mechanical properties .The notched impact strength,tensile strength and elongation at break of PP/UHMWPE composites with composition ration of 90/10,can be 88.6kJ/m 2,45 1kpa,and 570%,respectively and correspondingly being 3.5,1.5 and 2.5 time of the value for PP 1330 However.The increase of viscosity resulted from increase of UHMWPE molecular weight will cause damage to the effects of modification.DSC graphs show that the ethylene block of PP 1330 can form co crystals with UHMWPE.Qenching makes co crystal markably increases ,therefore,the inter phase bonding force may be strengthened.\;

关 键 词：复合材料 聚丙烯 超高分子量 聚乙烯 共晶 混炼 

分 类 号：TQ325.106[化学工程—合成树脂塑料工业] TQ334.9