Dynamic Heterogeneity in Fully Miscible Blends of Polystyrene with Oligostyrene

Harmandaris, Vagelis A. and Kremer, Kurt and Floudas, George (2013) Dynamic Heterogeneity in Fully Miscible Blends of Polystyrene with Oligostyrene. Physical Review Letters. ISSN 0031-9007 (In Press)

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Abstract

Binary blends of polystyrene with oligostyrene are perfectly miscible (χ=0) yet dynamically heterogeneous. This is evidenced by independent probing of the dipole relaxation perpendicular to the backbone by dielectric spectroscopy and molecular dynamics. The self-concentration model with a single intra-molecular length scale qualitatively describes the slower segmental dynamics. A quantitative comparison based on MD however, requires a composition-dependent length scale. The pertinent dynamic length scale that best describes the slow segmental dynamics in miscible blends relates to both intra- and inter-molecular contributions.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Depositing User: Prof. V. Harmandaris
Date Deposited: 17 Mar 2013 11:35
Last Modified: 17 Sep 2017 06:48
URI: http://preprints.acmac.uoc.gr/id/eprint/177

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