Abstract
Polymer reference interaction site model (RISM) calculations are performed on melts of freely-jointed, vinyl polymer chains. The local monomer structure is modeled by three independent, hard-sphere sites corresponding to the CH 2 and CH backbone constituents and an arbitrary side-chain group. The six intersite radial distribution functions and partial structure factors are computed for chains of 100 backbone units, at a liquid like packing fraction of 0.5. It is found that the side-chain groups tend to shield the backbone sites from approaching each other at short distances. The extent of shielding increases with the size of the side-chain group. On a radius of gyration length scale all the radial distribution functions exhibit a universal correlation hole
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