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dc.contributor.authorSkolnick, Jeffrey
dc.contributor.authorYaris, Robert
dc.date.accessioned2009-02-03T21:11:13Z
dc.date.available2009-02-03T21:11:13Z
dc.date.issued1988-01-15
dc.identifier.citationJournal of Chemical Physics, 1988:88: 1418-1442en
dc.identifier.issn0021-9606
dc.identifier.urihttp://hdl.handle.net/1853/26895
dc.description©1988 American Institute of Physicsen
dc.descriptionThe electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?JCPSA6/88/1418/1
dc.descriptionDOI:10.1063/1.454213
dc.description.abstractA phenomenological theory of the nonmechanical and viscoelastic properties of polymer melts is developed. Consistent with computer simulation results [A. Kolinski, J. Skolnick, and R. Yaris, J. Chem. Phys. 86, 1567, 7164, 7174 (1987)], that fail to find evidence for reptation as the dominant mechanism of long distance motion in a melt, we assume that the long-time behavior of a chain is that of a Rouse-like chain having a number of slow moving points, each with a friction constant proportional to the degree of polymerization n. Coupled with the assumption of rubber like behavior at short times made previously by Doi and Edwards [J. Chem. Soc., Faraday Trans. 2 74, 1802 (1978)], the theory predicts that over a broad molecular weight range the shear viscosity scales with n as approximately the 3.4 power of the molecular weight, and that ~n³ in the infinite molecular weight limit. Furthermore, the theory rationalizes the origin of the different crossover molecular weights for the shear viscosity and the self-diffusion coefficient, D. It also accounts for the origin of the intermediate time coupling of the center-of-mass motion into the internal coordinates and for the time dependence of the single bead positional autocorrelation functions seen in previous simulations. Proceeding by analogy to Graessley [J. Poly. Sci. Poly. Phys. Ed. 18, 27 (1980)], in the large molecular weight limit, phenomenological expressions for D and are derived and comparison is made with experiment.en
dc.language.isoen_USen
dc.publisherGeorgia Institute of Technologyen
dc.subjectPolymersen
dc.subjectMeltsen
dc.subjectLiquid phaseen
dc.subjectViscoelasticityen
dc.subjectComputerized simulationen
dc.subjectMolecular weighten
dc.titlePhenomenological theory of the dynamics of polymer melts. II. Viscoelastic propertiesen
dc.title.alternativeViscoelastic properties
dc.typeArticleen
dc.contributor.corporatenameWashington University (Saint Louis, Mo.). Dept. of Chemistry
dc.contributor.corporatenameWashington University (Saint Louis, Mo.). Institute of Macromolecular Chemistry
dc.publisher.originalAmerican Institute of Physics


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