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Título: | Polymer chain diffusion in polymer blends. A theoretical interpretation based on a memory function formalism |
Autor: | Colmenero de León, Juan CSIC ORCID | Fecha de publicación: | 10-mar-2019 | Editor: | John Wiley & Sons | Citación: | Journal of Polymer Science - B - Polymer Physics Edition 57(18): 1239-1245 (2019) | Resumen: | The diffusion of polymer chains in miscible polymer blends with large dynamic asymmetry—those where the two blend components display very different segmental mobility—is not well understood yet. In the extreme case of the blend system of poly(ethylene oxide) (PEO) and poly(methyl methacrylate)(PMMA), the diffusion coefficient of PEO chains in the blend can change by more than five orders of magnitude while the segmental time scale hardly changes with respect to that of pure PEO. This behavior is not observed in blend systems with small or moderate dynamic asymmetry as, for instance, polyisoprene/poly(vinyl ethylene) blends. These two very different behaviors can be understood and quantitatively explained in a unified way in the framework of a memory function formalism, which takes into account the effect of the collective dynamics on the chain dynamics of a tagged chain. | Versión del editor: | http://dx.doi.org/10.1002/polb.24811 | URI: | http://hdl.handle.net/10261/205865 | DOI: | 10.1002/polb.24811 | Identificadores: | doi: 10.1002/polb.24811 e-issn: 1099-0488 issn: 0887-6266 |
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