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

Chinese Journal of Applied Chemistry ›› 1989, Vol. 0 ›› Issue (5): 70-72.

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

Zhang xuanqi, Hu Huizhen, He Zhiduan, Zhang Hao

Changchun Institute of Applied Chemistry, Academia Sinica

Received:1988-12-27 Revised:1989-04-20 Published:1989-10-10 Online:1989-10-10

Abstract

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(n_w) 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

Zhang xuanqi, Hu Huizhen, He Zhiduan, Zhang Hao. DETERMINATION OF LONG CHAIN BRANCHING OF POLYMER BY GPC COMBINED WITH LALLS[J]. Chinese Journal of Applied Chemistry, 1989, 0(5): 70-72.

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

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