Predicting the nonideal
phase behavior of binary and multicomponent
systems remains a significant challenge for particle-based simulations.
Here, we develop a transferable force field for chloroethenes, common
environmental contaminants, that can accurately model the vapor liquid
phase equilibria including azeotrope formation. The new all-atom force
field reproduces saturated liquid densities, saturated vapor pressures,
boiling points, and critical properties within 1, 10, 1, and 1% of
the experiment data, respectively. Furthermore, the vapor liquid equilibria
of trichloroethylene and 1-propanol binary mixture, which forms a
minimum boiling point azeotrope, is predicted with a reasonable accuracy.
The microstructure of neat and binary systems is explored using pair
correlation functions and spatial distribution functions. As the new
force field is consistent with transferable potentials for phase equilibria
(TraPPE) force field, it expands the applicability of TraPPE force
field to chloroethenes.