Abstract
The athermal lattice model in which elongated rigid molecules are simulated by rows of consecutive sites is generalized so as to include an attractive segment–segment interaction energy—ε. Thus a distinction is made between a liquidlike phase and a supercritical gas phase. The model is solved in the Bethe–di Marzio and in the quasichemical approximation. The presence of such an attractive interaction leads to a reasonable p,T diagram of state provided r=4 or 5 in three or six dimensions. For longer rods, only the phase transition from the supercritical gas with very large volume changes is obtained already for r?6.

This publication has 9 references indexed in Scilit: