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DU Xue, XU Yuanze, QIAN Renyuan. RHEOLOGICAL CHARACTERIZATION OF PROCESSABILITY OF UNVULCANIZED POLYBUTADIENE[J]. Chinese Journal of Polymer Science,
;1987, 5(1): 81-86.
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Rheological investigation on a series ot unvulcamzed polybutadiene elastomers of different processability has been carried out by means of a capillary extrusion rheometer. It is found that the processability of unvulcanized polybutadiene can be correlated with the occurrence of unsteady flow and the wall stress, dependence of the dimensionless number e characterizing the entrance elongational elasticity which has been found to be sensitive to the branching structure and the molecular weight distribution of the samples.Interpretation based on the atructural data of unvulcanized polybutadiene were discussed.
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