Quantitative Theory of the Globule-to-Coil Transition. 3. Globule-Globule Interaction and Polymer Solution Binodal and Spinodal Curves in the Globular Range

A. Yu Grosberg, D. V. Kuznetsov

    Research output: Contribution to journalArticlepeer-review

    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 third in this series) we analyze quantitatively interactions between chains in a poor solvent. At first we calculate density distributions and the interaction free energy for two globules equilibrated at an arbitrary distance ζ from each other; a special method has been used for this calculation based on the introduction of two auxiliary uniform fields which do not perturb the globules' inner structures but fix the value of ζ. Then we calculate the corresponding pair virial coefficient and the coexistence binodal curve on the T-c plane in the second virial approximation. We estimate also the spinodal T-c curve.

    Original languageEnglish (US)
    Pages (from-to)1991-1995
    Number of pages5
    JournalMacromolecules
    Volume25
    Issue number7
    DOIs
    StatePublished - Mar 1 1992

    ASJC Scopus subject areas

    • Organic Chemistry
    • Polymers and Plastics
    • Inorganic Chemistry
    • Materials Chemistry

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