On the dynamics of grafted branched polymers—a Monte Carlo simulation study |
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Authors: | Piotr Romiszowski Andrzej Sikorski |
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Institution: | (1) Department of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland |
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Abstract: | A simplified model of grafted branched polymers was designed and investigated. The model consisted of star-branched chains
constructed on a simple cubic lattice. The star polymers were built of three arms of equal lengths. The chains were attached
to an impenetrable flat surface with one arm’s end. The arm attached to the surface (a stem) was built of segments different
from those in two remaining arms (branches). During the Monte Carlo simulation of the system, the conformation of each chain
was modified according to the metropolis sampling algorithm with local changes of chain conformations. The simulations were
performed for different chain lengths and the temperature of the system (solvent conditions). The structure of a polymer film
formed on the grafting surfaces depended strongly on the temperature and the low temperature films consisted of two separate
layers with the insoluble layer located near the grafting surface. The short-time relaxation of the branches and stems of
chains was also investigated. The analysis of the dynamics of the model system shows the influence of the structure of the
system on relaxation times of various parameters.
Paper presented at the AERC 2005 held on April 21–23, 2005 in Grenoble, France. |
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Keywords: | Grafted polymers Lattice models Miktoarm star-branched chains Monte Carlo simulation Grafted polymers |
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