玻璃微珠改性聚丙烯的熔融、结晶与形态  

MELTING, CRYSTALLIZATION AND MORPHOLOGY OF GLASS BEAD FILLED PP AND LLDPE COMPOSITES

作　　者：杨伟[1] 史炜[1] 谢邦互[1] 李忠明[1] 冯建民[1] 杨鸣波[1] 

机构地区：[1]四川大学高分子材料科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2005年第2期249-252,共4页Polymer Materials Science & Engineering

基　　金：教育部博士点基金(2002610006)项目资助

摘　　要：采用玻璃微珠改性聚丙烯并对复合材料的熔融、结晶行为与形态结构进行了研究。结果表明,玻璃微珠一定程度上起到了异相成核作用,有利于PP的结晶,提高了结晶速率。与单螺杆挤出复合材料相比,双螺杆挤出复合材料的塑化效果较好,玻璃微珠与基体的粘接情况也较好。冲击断面呈现典型的脆性断裂特征,玻璃微珠大量蓄积在冲击断面。而拉伸破坏断面表现出显著的塑性变形,形成大量带状或纤维状形变区域,材料最终的拉伸性能则取决于玻璃微珠与基体粘接和脱粘的综合效果。The melting, crystallization and morphology of glass bead filled polypropylene composites were investigated. The results indicate that the glass bead has heterogeneous nucleation effect on the crystallization of PP matrix. The extrudate from twin-screw extruder shows better politicizing effect and better adhesion between glass bead and the matrix compared with that extruded from single screw extruder. The impact fracture surface presents typical brittle fracture character with local plastic deformation while the tensile fracture surface shows significant plastic deformation and the tensile properties of the composites is dependent on the adhesion and debonding of the glass bead in the matrix.

关 键 词：玻璃微珠 聚丙烯 熔融 结晶 形态结构 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]