Thermodynamic admissibility of the pompon model for branched polymers
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- Öttinger, H. Rheol. Acta (2001) 40: 317. doi:10.1007/s003970000159
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The pompon model for branched polymers is re-formulated within a general framework of nonequilibrium thermodynamics. While the original model of McLeish and Larson is found to be thermodynamically admissible, nonequilibrium thermodynamics strongly suggests several model modifications. As an immediate consequence, a nonzero second normal-stress coefficient in shear flow is predicted by the modified pompon model.