中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (4): 31-34.

• 研究论文 • 上一篇    下一篇

支化高分子在溶液中的交叠与缠结

李学, 金鹰泰, 宋宇宏, 金春山   

  1. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:1991-03-21 修回日期:1991-09-26 出版日期:1992-08-10 发布日期:1992-08-10

EFECT OF BRANCHED STRUCTURE OF POLYMER ON THE OVERLAP AND ENTANGLEMENT IN DILUTE SOLUTION

Li Xue, Jin Yingtai, Song Yuhong, Jin Chunshan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1991-03-21 Revised:1991-09-26 Published:1992-08-10 Online:1992-08-10

PDF

585

被引次数

1

摘要： 溶液中高分子的交叠和缠结与其链结构密切相关。支化聚苯乙烯的临界交叠浓度C*和临界缠结浓度CE*比分子量相同的线型聚苯乙烯的大,说明交叠和缠结同分子在溶液中线团的体积有直接关系。

关键词: 聚苯乙烯, 临界浓度, 交叠, 缠结

Abstract: The critical overlap concentration (C*) and the critical entanglement concentration CE* of linear polystyrene (LPS) and branched polystyeene (BPS) have been disseussedThe values of C* and CE* were calculated according to the Graessley and Klein equation C*=0.77/[η], C*=1.08/[η], respectively. The results showed that the C* and CE* of branched polystyrene were larger than those of linear polystyrene.

Key words: polystyrene, critical concentration, overlap, entanglement

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