拉伸对β晶型聚丙烯结构的影响  

STUDY ON THE EFFECT Of DRAWING ON THE CRYSTALLINE STRUCTURE OF B-FORM POLYPROPYLENE BY DSC

作　　者：吴平平[1] 王海燕[1] 储凤 韩哲文[1] 吏观一 

机构地区：[1]中国科学技术大学材料科学与工程系 [2]中国科学院上海有机化学研究所

出　　处：《高分子学报》1989年第1期65-69,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金

摘　　要：用DSC法研究了不同拉伸条件对β晶型聚丙烯(β-PP)结构的影响,结合X-射线衍射法探讨了拉伸比,拉伸温度和拉伸速率等对β→α转变及其结晶结构的变化所起的作用。 结果表明提高拉伸温度和拉仲比有利于β→α转变及结晶度的提高。并讨论了拉伸过程中β→α转变机理及影响结晶结构的因素。The effects of the drawing temperature, the drawing ratio and the drawing rate on the crystalline structure of β form polypropylene have been studied by DSC and X-ray diffraction. The results indicate that increasing the drawing temperature and the drawing ratio favor the transition of β-α form and the increasing crystallinity. The mechanism of β-α form transition of β form polypropylene during drawing and the effects of drawing on the microstructure have been discussed.

关 键 词：聚丙烯 拉伸 示差扫描 Β晶型 

分 类 号：O632.12[理学—高分子化学]