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Phase behavior of correlated random copolymers

Patyukova, Elena and Xi, Erte and Wilson, Mark (2021) 'Phase behavior of correlated random copolymers.', Macromolecules., 54 (6). pp. 2763-2773.


In this work, we calculate Flory-Huggins phase diagrams for correlated random copolymers. We achieve it in two steps. At first, we derive a distribution function of two-letter A, B copolymer chains depending on the fraction of A-segments and ABduplets. Then we use the method of moments, which was developed by Sollich and Cates [Sollich, P.; Cates, M. E.; Phys. Rev. Lett. 1998, 80, 1365–1368] for polydisperse systems, to reduce the number of degrees of freedom of the computational problem and calculate phase diagrams. We explore how the location of transition points and composition of coexisting phases depends on fractions of A-segments and AB-duplets in a sequence and the degree of polymerization. The proposed approach allows taking into account fractionation, which was shown to affect the appearance of phase diagrams of statistical copolymers.

Item Type:Article
Full text:Publisher-imposed embargo
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Available under License - Creative Commons Attribution 4.0.
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Publisher statement:Copyright © 2021 American Chemical Society
Date accepted:22 February 2021
Date deposited:08 March 2021
Date of first online publication:10 March 2021
Date first made open access:15 December 2021

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