Topologically driven compatibility enhancement in the mixtures of rings and linear chainsстатья
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Дата последнего поиска статьи во внешних источниках: 12 октября 2013 г.
Аннотация:The thermodynamics of the bicomponent melts of linear chains A and unknotted unentangled closed chains B (trivial rings) is considered within the framework of the usual Flory approach. It is shown that such melts exhibit a compatibility enhancement in comparison with the corresponding melts of linear chains. The reason for such effect is due to the topological entropy gain of mixing of A- and B-chains: if B-chains are unentangled since the A-chains play the role of a ''diluent'' softening the topological restrictions imposed on the B-chains. This result is in agreement with recent experimental findings of McKnight et al.