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Authors
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Lang, M. ; Rubinstein, M. ; Sommer, J.-U.
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Title
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Conformations of a Long Polymer in a Melt of Shorter Chains: Generalizations of the Flory Theorem
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Date
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01.02.2015
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Number
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45489
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Abstract
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Large-scale simulations of the swelling of a long N-mer in a melt of chemically identical P-mers are used to investigate a discrepancy between theory and experiments. Classical theory predicts an increase of probe chain size R ~ P–0.18 with decreasing degree of polymerization P of melt chains in the range of 1 < P < N1/2. However, both experiment and simulation data are more consistent with an apparently slower swelling R ~ P–0.1 over a wider range of melt degrees of polymerization. This anomaly is explained by taking into account the recently discovered long-range bond correlations in polymer melts and corrections to excluded volume. We generalize the Flory theorem and demonstrate that it is in excellent agreement with experiments and simulations.
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Publisher
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ACS Macro Letters
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Wikidata
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Citation
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ACS Macro Letters 4 (2015) 177-181
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DOI
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https://doi.org/10.1021/mz500777r
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Tags
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molecular-weight homologs dimensions dynamics blends
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