应用化学 ›› 1993, Vol. 0 ›› Issue (1): 25-29.

• 研究论文 • 上一篇    下一篇

马来酸酐接枝聚丙烯共聚物的球晶径向生长速率和形态

刘景江   

  1. 中国科学院长春应用化学研究所 130022 长春
  • 收稿日期:1991-09-17 修回日期:1992-03-14 出版日期:1993-02-10 发布日期:1993-02-10

SPHERULITIC GROWTH RATES AND MORPHOLOGY IN MALEIC ANHYDRIDE-g-POLYPROPYLENE

Liu Jingjiang   

  1. Changchun Institute of Applied Chemistry, Sinica, 130022 Changchun
  • Received:1991-09-17 Revised:1992-03-14 Published:1993-02-10 Online:1993-02-10

摘要: 本文用偏光显微镜和DSC研究了马来酸酐接枝聚丙烯共聚物的形态,球晶径向生长速率及结晶熔融行为。马来酸酐与聚丙烯在接枝共聚物中是部分互容的。按照相容性共混高聚物结晶动力学理论计算,Ⅲ区向Ⅱ区转变的温度为132℃,接枝共聚物的结晶平衡熔点为200℃,比全同聚丙烯的相应值低8℃。

关键词: 马来酸酐/聚丙烯接枝共聚物, 等温结晶, 球晶生长速率, 平衡熔融温度, 表面自由能

Abstract: The isothermal radial growth rates of spherulites and the morphology of maleic anhydride-g-polypropylene have been determined by means of polarizing microscope. Chain segments of maleic anhydride and polypropylene in the graft copolymer are partly compatible. A change in the growth region is observed at 132℃ and interpreted as a Region Ⅲ→Region Ⅱ transition, according to the kinetic theory of compatible polymer blend crystallization. The equilibrium melting temperature (Tm0) of the graft copolymer was measured as 200℃, lower than that of ipp.

Key words: maleic anhydride-g-polypropylene, graft copolymer, isothermal crystallization, spherulitic growth, equilibruim melting temperature, surface energy