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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.
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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(nw) and average branching degree(λ) and their distribution as well as molecular weight distribution can be obtained simultaneously.
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Keywords:
- Cis-1,
- 4-polybutadienc,
- Branching,
- GPC
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