中华医学超声杂志

应用化学 ›› 1989, Vol. 0 ›› Issue (5): 70-72.

• 研究简报 • 上一篇    下一篇

凝胶色谱-光散射联机法测定高聚物的长链支化度

张宣琪, 胡慧贞, 贺智端, 张浩   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1988-12-27 修回日期:1989-04-20 出版日期:1989-10-10 发布日期:1989-10-10
  • 基金资助:
    中国石油化工总公司资助项目

DETERMINATION OF LONG CHAIN BRANCHING OF POLYMER BY GPC COMBINED WITH LALLS

Zhang xuanqi, Hu Huizhen, He Zhiduan, Zhang Hao   

  1. Changchun Institute of Applied Chemistry, Academia Sinica
  • Received:1988-12-27 Revised:1989-04-20 Published:1989-10-10 Online:1989-10-10

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摘要： 运用凝胶渗透色谱-光散射联用技术(GPC-LALLS)测定聚合物的长链支化度的基本原理是:在将聚合物分子按其流体力学体积顺序分离的同时,通过光散射仪逐滴测定溶液中聚合物的分子量。经过对谱图上逐点进行扩展效应的改正,通过普适标定线,求出支化分子与线型分子回转半径的比值,以计算试样的支化度及其分布。

关键词: 顺丁橡胶, 支化, GPC, LALLS

Abstract: The basic princip'e and the techinque of measuring tbe long chain branching degree ofpolymers by gel permeation chromatography combined with low angle laser light scattering(GPC-LALLS) ale described. The branching degrees of a number of Ni catalysed cis-1,4-polybutadiene samples were measured. Using this technique the average branching factor(g),weight average numbor of branch-ing points per mclecule(nw) and average branching degree(λ) and their distribution as wellas molecular weight distribution can be obtained simultaneously.

Key words: Cis-1,4-polybutadienc, Branching, GPC, LALLS

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