EFFECT OF THE FINITE EXTENSIBILITY OF CHA INS ON THE DENSITY DISTRIBUTION IN POLYMER COILS

The density distribution of beads with respect to their center of mass was calculated on the basis of the model of beads connected by free-j ointed rigid bonds. This distribution is proportional to the density d istribution of monomers in a theta-solvent provided the chains are suf ficiently long. The distribution functions for the distances between t he center of mass and different beads were also calculated. As the num ber of segments grows, the density distribution approaches that for th e Gauss model. However, even for the chains comparising a small number of segments the difference is noticeable only for distances, that are more than twice greater than the radius of gyration of the coil. An i ncrease in the chain rigidity (the length of the segment) leads to a m ore rapid drop in the density at this distant periphery.