• Login
    View Item 
    •   SMARTech Home
    • College of Sciences (CoS)
    • School of Biology
    • Center for the Study of Systems Biology (CSSB)
    • Skolnick Research Group Publications
    • View Item
    •   SMARTech Home
    • College of Sciences (CoS)
    • School of Biology
    • Center for the Study of Systems Biology (CSSB)
    • Skolnick Research Group Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Phenomenological theory of the dynamics of polymer melts. II. Viscoelastic properties

    Thumbnail
    View/Open
    067.pdf (2.821Mb)
    Date
    1988-01-15
    Author
    Skolnick, Jeffrey
    Yaris, Robert
    Metadata
    Show full item record
    Abstract
    A 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.
    URI
    http://hdl.handle.net/1853/26895
    Collections
    • Skolnick Research Group Publications [73]

    Browse

    All of SMARTechCommunities & CollectionsDatesAuthorsTitlesSubjectsTypesThis CollectionDatesAuthorsTitlesSubjectsTypes

    My SMARTech

    Login

    Statistics

    View Usage StatisticsView Google Analytics Statistics
    • About
    • Terms of Use
    • Contact Us
    • Emergency Information
    • Legal & Privacy Information
    • Accessibility
    • Accountability
    • Accreditation
    • Employment
    • Login
    Georgia Tech

    © Georgia Institute of Technology

    • About
    • Terms of Use
    • Contact Us
    • Emergency Information
    • Legal & Privacy Information
    • Accessibility
    • Accountability
    • Accreditation
    • Employment
    • Login
    Georgia Tech

    © Georgia Institute of Technology