Quantitative theory of the globule-to-coil transition. 2. Density-density correlation in a globule and the hydrodynamic radius of a macromolecule

A. Yu Grosberg, D. V. Kuznetsov

    Research output: Contribution to journalArticle

    Abstract

    In this series of papers new results and a brief review of the current state of mean-field theories of the condensed globular state and of the globule-to-coil transition in the θ-region for a linear, homogeneous, noncharged macromolecule are presented. As a basis of our consideration, we use both Lifshitz's theory and interpolation Flory-type theory. Complete quantitative theoretical results are obtained and compared with experimental data. In this paper (the second in this series) the macromolecule properties determined by the pair density-density correlation function are considered. This function for a polymer globule is calculated in the framework of mean-field Lifshitz's theory. Using the correlation function, the hydrodynamic radius of a macromolecule is found in the Kirkwood approximation. The value of fluctuations of the macromolecule radius of gyration is calculated in the region of the globule-to-coil transition, which is connected with a sharp change in the fluctuational regime. The existence of a maximum of fluctuations in the transition region is shown.

    Original languageEnglish (US)
    Pages (from-to)1980-1990
    Number of pages11
    JournalMacromolecules
    Volume25
    Issue number7
    StatePublished - 1992

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    Macromolecules
    Hydrodynamics
    Mean field theory
    Interpolation
    Polymers

    ASJC Scopus subject areas

    • Materials Chemistry

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    Quantitative theory of the globule-to-coil transition. 2. Density-density correlation in a globule and the hydrodynamic radius of a macromolecule. / Grosberg, A. Yu; Kuznetsov, D. V.

    In: Macromolecules, Vol. 25, No. 7, 1992, p. 1980-1990.

    Research output: Contribution to journalArticle

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