Citation: SUN Benhui, JIN Riguang. DETERMINATION OF BRANCHING DISTRIBUTION IN HIGH cis-1,4-POLYBUTADIENE BY GPC AND AUTOMATIC VISCOMETRY*[J]. Chinese Journal of Polymer Science, ;1984, 2(2): 138-145. shu

DETERMINATION OF BRANCHING DISTRIBUTION IN HIGH cis-1,4-POLYBUTADIENE BY GPC AND AUTOMATIC VISCOMETRY*

SUN Benhui ,
JIN Riguang

Received Date: 28 November 1983

Based on the methods reported by Ambler and Kraus, a method has been developed for the determination of long-chain branching distribution in polymers by the combined use of GPC and intrinsic viscosity data of polymer fractions. In this method, gi, λi, Gi, mi, the weight percentage of polymer that is branched, etc. can be used simultaneously to characterize the distribution, degree and content of branching in polymers. Some relations between molecular weight polydispersity and branching polydispersity in Nickel-based high cis-1,4-polybutadiene samples are discussed.It was found that the number of long branchedλ per unit molecular weight is a function of molecular weight and all of the samples are highly branched at a molecular weight of about 106.
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