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Updated: Jun 21, 2026

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
Published on: September 26, 2016
Role of distributions of intramolecular concentrations on the dynamics of miscible polymer blends probed by molecular
Wenjuan Liu1, Dmitry Bedrov, Sanat K Kumar
1Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Abstract:
Using molecular dynamics simulations we show that a given monomer in a miscible polymer blend experiences broad distributions of both connectivity driven self-concentrations and thermodynamically controlled intermolecular concentration fluctuations. While these distributions should play a significant role in determining the constituent's dynamics across the whole concentration range, the distribution of self-concentrations is particularly important in the dilute limit, where intermolecular concentration fluctuations should be absent. These conclusions allow us to rationalize the recent literature results that report the apparent self-concentration determined in the dilute limit surprisingly depended on the blend partner.
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