J. Phys. I France 1 (1991) 1583-1590
Enrichment of the chain ends in polymer melts at interfacesJiang-Sheng Wang and Kurt Binder
Institut für Physik, Johannes-Gutenberg-Universität, Staudinger Weg 7, D-6500 Mainz, Germany and Max-Planck-Institut für Polymerforschung, D-6500 Mainz, Germany
(Received 21 May 1991, accepted in final form 8 July 1991)
By Monte Carlo simulation of two lattice models of polymer melts, the enrichment of the chain ends in the vicinity of a wall is obsserved. For the bond fluctuation model with attractive interactions between the ends and wall, and 0, the enhancement of the density of ends increases with chain lengths, while when the interaction is repulsive, , the ends get depleted. The self-avoiding walk model was simulated with the slithering snake algorithm and behaves similarly. The polymer center of mass density profile, radius of gyration and end-to-end distance components parallel and perpendicular to the wall as functions of center of mass distance z scale with , where is radius of gyration of the polymer chains in the bulk.
© Les Editions de Physique 1991