Title:
Monte Carlo dynamics of diamond-lattice multichain systems
Monte Carlo dynamics of diamond-lattice multichain systems
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Author(s)
Kolinski, Andrzej
Skolnick, Jeffrey
Yaris, Robert
Skolnick, Jeffrey
Yaris, Robert
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Abstract
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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1986-01-30
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Proceedings