Rheology of polymer melts and concentrated solutions |
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| Affiliation: | 1. “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Vodă 41 A, Iaşi 700487, Romania;2. Department of Natural and Synthetic Polymers, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iaşi, Mangeron Avenue 73, 700050 Iaşi, Romania;3. Center of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Vodă 41 A, 700487 Iaşi, Romania |
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| Abstract: | The basic concepts of entangled polymer dynamics, like that of ‘tube’ of constraints and of ‘reptation’, have not yet exhausted their momentum. Further progress has taken place recently with detailed calculations of tube length fluctuations and constraint release, not only for branched polymers but also for linear ones. Progress in the non-linear range has occurred with the concept of convective constraint release and, for branched polymers, with the so-called ‘pom-pom’ model. Lack of complete agreement between theory and experiments stimulates work to proceed along various lines. |
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