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Issue 37, 2014
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Evidence of random copolymer adsorption at fluctuating selective interfaces from Monte-Carlo simulation studies

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Abstract

We perform Monte-Carlo simulations of a binary, strongly separated mixture of A- and B-type homopolymers with some amount of random AB copolymers added. The interface is analyzed and the interface tension is calculated using the model of capillary waves. We can clearly demonstrate that random copolymers are localized at real, fluctuating interfaces between incompatible polymer species and micellization is not favored over adsorption. Our study proves that random copolymers are potential candidates for compatibilization of polymer-polymer mixtures. By simulating random copolymers in a one-component bulk and comparing their free energy to the copolymers adsorbed at the two-phase interface we show that the adsorption is thermodynamically stable. We use scaling arguments developed for ideal and non-fluctuating interfaces to rationalize the simulation results and we calculate the reduction of interface tension with increasing amount of the adsorbed copolymers.

Graphical abstract: Evidence of random copolymer adsorption at fluctuating selective interfaces from Monte-Carlo simulation studies

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Publication details

The article was received on 17 Jun 2014, accepted on 23 Jul 2014 and first published on 25 Jul 2014


Article type: Paper
DOI: 10.1039/C4SM01293C
Author version available: Download Author version (PDF)
Citation: Soft Matter, 2014,10, 7247-7255
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    Evidence of random copolymer adsorption at fluctuating selective interfaces from Monte-Carlo simulation studies

    I. Gazuz and J. Sommer, Soft Matter, 2014, 10, 7247
    DOI: 10.1039/C4SM01293C

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