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Citation: Jin Chunshan, Sun shulian, Sui Shaowu. STUDY ON LONG CHAIN BRANCHING OF 1,2-POLYBUTADIENES USING GPC COUPLED WITH CAPLLARY VISCOMETER[J]. Chinese Journal of Applied Chemistry, ;1986, 3(3): 50-55. shu

STUDY ON LONG CHAIN BRANCHING OF 1,2-POLYBUTADIENES USING GPC COUPLED WITH CAPLLARY VISCOMETER

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 22 January 1985
Available Online: 5 April 1985

The tacticity of 1,2-polybutadienes Was determined by using ¹³C-NMR technique.The results obtained show that the tacticity of the molecules did not change much with the change of molecular weight. Therefore the long chain branching of 1,2-polybutadiene may be characterized by GPC-AUV technique. The long chain branching of 1,2-polybutadienes was measured by a GPC coupled with an automatic recording capillary viscometer. In this work the experimental relation [η]_(v) was translated to the calibration curve [η]_(VR) for the mono disperse samples.The curve[η}_(VR) combined with the principle of universal calibration will provide the molecular weight distribution and the average brandhing effect in the samples.
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