iPP/PPOc共混物相容性和结晶行为的研究  

Miscibility and Crystallization Behavior of iPP/Poly(propylene-co-octene) Blends

作　　者：尹丽[1] 孟学林[1] 樊丁珲[1] 周秋民[1] 符新[2] 

机构地区：[1]广西工业职业技术学院石油与化学工程系,南宁530001 [2]海南大学机电工程学院,海口570228

出　　处：《材料导报》2012年第18期127-131,共5页Materials Reports

基　　金：广西教育厅科研项目(桂教科研[2007]34号)

摘　　要：采用差示扫描量热仪、偏光显微镜、动态热机械性能测试仪和广角X射线衍射仪等,对不同组成的iPP/PPOc共混物的相容性和结晶行为进行了深入的研究。结果表明,iPP/PPOc共混物在整个组成范围内均出现一个玻璃化转变温度,说明在无定形区iPP和PPOc具有较好的相容性,而玻璃化转变温度随着PPOc含量的增加呈下降趋势;此外,随着PPOc含量的增加,共混物的熔点、结晶温度、球晶尺寸和球晶的完善程度均呈下降趋势,而不影响共混物的晶型;iPP/PPOc共混物在其整个组成范围内都只出现1个熔融峰和1个结晶峰,说明在晶区产生了共晶现象。The miscibility and crystallization behavior of the iPP/poly（propylene-co octene） copolymer（PPOc） blends as a function of PPOc content in the blends were investigated in detail, by differential scanning calorimetry, op- tical microscopy and wideangle X-ray diffraction. The blends were proved to be miscible systems by the existence of single composition dependent glass transition temperature over the entire composition. The T, values of iPP/PPOc blends showed a gradual decrease with increasing PPOc content. The melting and crystallization temperatures, spheru- lites diameter and perfection of the iPP/PPOc blends decreased with the increase of PPOc content in the blends. Only one melting peak and one crystalline peak were observed over the entire composition range of the iPP/PPOc, demon- strating the cocrystallization in the crystalline region.

关 键 词：聚丙烯 丙烯1-辛烯共聚物 相容性 共混 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]