Monte Carlo dynamics of diamond-lattice multichain systems

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Kolinski, Andrzej
Yaris, Robert
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School of Biological Sciences
School established in 2016 with the merger of the Schools of Applied Physiology and Biology
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http://hdl.handle.net/1853/27919
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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