Thermodynamic admissibility of the pompon model for branched polymers |
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| Authors: | Hans Christian Öttinger |
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| Affiliation: | (1) ETH Zürich, Department of Materials Institute of Polymers, and Swiss Rheocenter, 8092 Zürich, Switzerland e-mail: hco@ifp.mat.ethz.ch, CH |
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| Abstract: | 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. Received: 12 April 2000 Accepted: 11 September 2000 |
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| Keywords: | Melts of branched polymers Pompon model Nonequilibrium thermodynamics GENERIC Second normal-stress coefficient |
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