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Author: Kolinski, Andrzej × Author: Skolnick, Jeffrey × End date: 1989 × Start date: 1986 × Has files: Yes × search.filters.applied.f.resourcesubtype: Proceedings ×

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Monte Carlo dynamics of diamond-lattice multichain systems

1986-01-30 , Kolinski, Andrzej , Skolnick, Jeffrey , Yaris, Robert

We present preliminary results of Monte Carlo studies on the dynamics of multichain diamond-lattice systems at considerably greater densities than those done previously. Chain dynamics were simulated by a random sequence of three or four bond kink motions. The single bead autocorrelation function exhibits "slow" mode relaxation behavior with a g(t)∝ tβ. There is a smooth crossover from Rouse-like dynamics, β=1/2, at low density to smaller values of β at higher density and β=0 at the glass transition density (φG≅0.92). The simulation provides a self-diffusion coefficient D ∝ n-2, with n the number of beads, in agreement with experiment. A phenomenological model, different from the widely accepted reptation picture, is proposed.

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