Modeling chain stiffness, fusion and specific interaction using hard nonadditive size interactions

We suggest a general method of representing chain stiffness, segment fusion , ring rigidity, and specific forces using only nonadditive size interactio ns. The initial results of molecular dynamics simulations indicate ordering of stiff chains and micelle formation for chains with specific site-site i nteractions. (C) 1999 American Institute of Physics. [S0021-9606(99)51135-5 ].