Tests of mode coupling theory in a simple model for two-component miscible polymer blends

Details Tests of mode coupling theory in a simple model for two-component miscible polymer blends Tests of mode coupling theory in a simple model for two-component miscible polymer blends

2007-08-06

arxiv.org/abs/0708.0799v2

Physics

Condensed Matter

Soft Condensed Matter

Revised version. Additional figures and citations

Scientific paper

10.1088/0953-8984/19/46/466112

We present molecular dynamics simulations on the structural relaxation of a simple bead-spring model for polymer blends. The introduction of a different monomer size induces a large time scale separation for the dynamics of the two components. Simulation results for a large set of observables probing density correlations, Rouse modes, and orientations of bond and chain end-to-end vectors, are analyzed within the framework of the Mode Coupling Theory (MCT). An unusually large value of the exponent parameter is obtained. This feature suggests the possibility of an underlying higher-order MCT scenario for dynamic arrest.

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