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Self-diffusion of polystyrene in solution 2. Discussion of experimental results on the basis of the reptation mechanism and entanglements

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dc.contributor.author Fleischer G.
dc.contributor.author Zgadzai O.
dc.date.accessioned 2018-09-14T20:13:53Z
dc.date.available 2018-09-14T20:13:53Z
dc.date.issued 1988
dc.identifier.issn 0303-402X
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/132246
dc.description.abstract The expressions for polymer self-diffusion in semidilute solutions, theoretically derived from the reptation mechanism, the blob concept and scaling considerations, are discussed and compared against experimental data from the authors' investigations and the literature. In the nonentangled (from viscoelastic data) semidilute solution, the experimentally observed concentration and molar mass exponents are in fair agreement with those derived theoretically. However, a quantitative estimation shows that the experiments cannot be explained by reptation. Experiments with polymer mixtures also give strong evidence against reptation. It is concluded, that in the nonentangled semidilute solution, the polymer self-diffusion is more complicated than simple reptation. This is also supported by recently observed long-range density fluctuations or cluster formation in this concentration region detected by scattering techniques and NMR-PFGT. In the entangled semidilute solution, the self-diffusion data are in accordance with the reptation mechanism; reptation being within a tube having approximately 20 blobs between entanglements. © 1988 Steinkopff.
dc.relation.ispartofseries Colloid & Polymer Science
dc.subject entanglements
dc.subject polystyrene solutions
dc.subject reptation
dc.subject Self-diffusion
dc.subject semidilute solution
dc.title Self-diffusion of polystyrene in solution 2. Discussion of experimental results on the basis of the reptation mechanism and entanglements
dc.type Article
dc.relation.ispartofseries-issue 3
dc.relation.ispartofseries-volume 266
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 208
dc.source.id SCOPUS0303402X-1988-266-3-SID0023981317


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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