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Elasticity Dominated Surface Segregation of Small Molecules in Polymer Mixtures

Jarosław Krawczyk, Salvatore Croce, T. C. B. McLeish, Buddhapriya Chakrabarti
<span title="2016-05-18">2016</span> <i title="American Physical Society (APS)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/pkmpevvs3bgkhal5dvrmsu5mvq" style="color: black;">Physical Review Letters</a> </i> &nbsp;

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<span title="2015-09-24">2015</span> <span class="release-stage" >pre-print</span>
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1509.07311v1">arXiv:1509.07311v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/gvaygovpfvfnpnad7yzocq65ri">fatcat:gvaygovpfvfnpnad7yzocq65ri</a> </span>
We study the phenomenon of migration of the small molecular weight component of a binary polymer mixture to the free surface using mean field and self-consistent field theories. By proposing a free energy functional that incorporates polymer-matrix elasticity explicitly, we compute the migrant volume fraction and show that it decreases significantly as the sample rigidity is increased. Estimated values of the bulk modulus suggest that the effect should be observable experimentally for
more &raquo; ... e materials. This provides a simple way of controlling surface migration in polymer mixtures and can play an important role in industrial formulations, where surface migration often leads to decreased product functionality.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1103/physrevlett.116.208301">doi:10.1103/physrevlett.116.208301</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/27258886">pmid:27258886</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/ib5no7lqzzgtjksmvzpjbwv6ri">fatcat:ib5no7lqzzgtjksmvzpjbwv6ri</a> </span>
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Citation

Jarosław Krawczyk, Salvatore Croce, T. C. B. McLeish, Buddhapriya Chakrabarti. "Elasticity Dominated Surface Segregation of Small Molecules in Polymer Mixtures." Physical Review Letters 116.20 (2016)