Complete theoretical phase diagrams for the case of a nematic liquid c
rystal in solution are presented. Several example calculations demonst
rate the effects of molecular weight and enthalpic interactions on the
expected phase behavior. For two prototypical cases, one correspondin
g to a low molecular weight compound and the other to its polymeric an
alog, spinodal curves are calculated based on the necessary and suffic
ient conditions for phase stability. The phase diagrams for these syst
ems are found to exhibit large metastability gaps.