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Computer simulation of relaxation phenomena in star‐branched polymers. Temperature dependence
Author(s) -
Sikorski Andrzej,
Romiszowski Piotr
Publication year - 1999
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/(sici)1521-3919(19990301)8:2<103::aid-mats103>3.0.co;2-8
Subject(s) - autocorrelation , simple cubic lattice , statistical physics , star polymer , monte carlo method , polymer , relaxation (psychology) , lattice (music) , star (game theory) , chain (unit) , thermodynamics , materials science , physics , nuclear magnetic resonance , mathematics , quantum mechanics , statistics , astrophysics , acoustics , polymerization , psychology , social psychology
Abstract Dynamic Monte Carlo simulations of simple models of star‐branched polymers were conducted. A model star macromolecule consisted of f = 3 arms of equal length with a total number of polymer segments up to 800. The chain was confined to a simple cubic lattice with simple nearest neighbor attractive interactions. The relaxation phenomena were studied by means of autocorrelation functions in wide ranges of temperatures. Short‐time‐scale dynamic processes in the entire star‐branched chain were examined. It was found that under good solvent conditions the longest relaxation time of the end‐to‐center vector decreases with decreasing temperature. For low temperatures (below the Θ ‐point) where the chain is collapsed, the dependence of the relaxation time on the temperature is opposite.