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Citation: 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, 6(5): 70-72. shu

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

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 27 December 1988
Available Online: 20 April 1989

The basic princip'e and the techinque of measuring tbe long chain branching degree of polymers 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 branching points per mclecule(n_w) and average branching degree(λ) and their distribution as well as molecular weight distribution can be obtained simultaneously.
- Cis-1,
- 4-polybutadienc,
- Branching,
- GPC
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