Jump to main content
Jump to site search

Issue 45, 2017
Previous Article Next Article

Statistical description of co-nonsolvency suppression at high pressures

Author affiliations

Abstract

We present an application of Flory-type theory of a flexible polymer chain dissolved in a binary mixture of solvents to theoretical description of co-nonsolvency. We show that our theoretical predictions are in good quantitative agreement with the recently published MD simulation results for the conformational behavior of a Lennard-Jones flexible chain in a binary mixture of the Lennard-Jones fluids. We show that our theory is able to describe co-nonsolvency suppression through pressure enhancement to extremely high values recently discovered in experiments and reproduced by full atomistic MD simulations. By analysing the co-solvent concentration in the internal polymer volume at different pressure values, we speculate that this phenomenon is caused by the suppression of the co-solvent preferential solvation of the polymer backbone at the rather high pressure imposed. We show that when the co-solvent-induced coil–globule transition takes place, the entropy and enthalpy contributions to the solvation free energy abruptly decrease, while the solvation free energy remains continuous.

Graphical abstract: Statistical description of co-nonsolvency suppression at high pressures

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Aug 2017, accepted on 25 Oct 2017 and first published on 26 Oct 2017


Article type: Communication
DOI: 10.1039/C7SM01637A
Citation: Soft Matter, 2017,13, 8362-8367
  •   Request permissions

    Statistical description of co-nonsolvency suppression at high pressures

    Yu. A. Budkov and A. L. Kolesnikov, Soft Matter, 2017, 13, 8362
    DOI: 10.1039/C7SM01637A

Search articles by author

Spotlight

Advertisements