We study early stages of spinodal decomposition (SD) in polymer/liquid crys
tal mixtures by solving linearized time-dependent Landau-Ginzburg equations
for concentration (conserved order parameter) and orientation (nonconserve
d order parameter). We calculate structure factors for concentration and fo
r orientation, depending on a quench temperature and concentration. We find
a new SD process driven by instability of the orientational order paramete
r.