Orientation correlation in simplified models of polymer melts

We investigate mutual local chain order in systems of fully flexible polyme r melts in a simple generic bead-spring model. The excluded-volume interact ion together with the connectivity leads to local ordering effects which ar e independent of chain length between 25 and 700 monomers, i.e, in the Rous e as well as in the reptation regime. These ordering phenomena extend to a distance of about 3 to 4 monomer sizes and decay to zero afterwards.