分子量及其分布对聚丙烯材料结晶形态的影响  

THE EFFECT OF MOLECULAR WEIGHT AND ITS DISTRIBUTION ON CRYSTALLINE MORPHOLOGY OF PP MATERIALS

作　　者：雷华[1] 徐涛[1] 于杰[2] 

机构地区：[1]贵州工业大学材料中心,贵州贵阳550003 [2]贵州科学院,贵州贵阳550001

出　　处：《高分子材料科学与工程》2004年第5期166-168,173,共4页Polymer Materials Science & Engineering

基　　金：贵州省省长基金;贵州省科学基金(黔科合2003JN027)资助项目

摘　　要：研究了不同分子量及其分布下聚丙烯材料结晶形态的变化规律,结果表明,用分子量分布宽度MWD这一参量来描述不同分子量及其分布下材料结晶形态的变化规律更为恰当。分子量的多分散性意味着高、低分子量组分之间存在明显的相互作用,决定了聚丙烯材料最终的结晶形态。The change rule of crystalline morphology of PP with different molecular weight and molecular weight distribution was researched. It is suitable to describe the change rule of crystalline morphology under different molecular weight and its distribution with the parameter of molecular weight distribution(MWD). The dispersion of molecular weight shows that the obvious mutual effect exists between the high and low molecular weight, it will determine the final crystalline morphology of PP materials.

关 键 词：分子量分布 聚丙烯 结晶形态 凝胶渗透色谱仪 球晶尺寸 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]