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1 Applied Mechanics and Engineering

1 1999

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Large-scale relaxation processes and translational mobility of macromolecules in orientational ordered polymer systems

100%

Maximov A. V. , Maximova O. G.

1999

tom Vol. 4, no spec.

79-84

Large-scale relaxation properties of multichain models of two- and three-dimensional (2d and 3d, correspondingly) polymer systems with interchain orientational interactions are investigated. The relaxation times of cooperative bending motions increase (in 2d- systems) or, on the contrary, decrease (in 3d- systems) with increasing of the orientational order. The proposed orientational models allow estimating the coefficients of translational diffusion of the macromolecule as the whole in orientational ordered polymer systems. It is shown that the interchain ordering leads to the decreasing of their translational mobility comparatively with that of isolated chain. The theoretical consideration for 3d- systems with the long-range orientational order confirms the interesting effect of the anisotropy of translational mobility of chains relatively the order axis (director), discovered earlier by experimental methods for the systems of LC type. The effective coefficients of translational diffusion of the chain as the whole along the director increases, while its diffusion capacity across this direction decreases with the increasing of interchain ordering.