  Pristine and organoclay modified polycarbonate/polystyrene (PC/PS) blends are
prepared using melt-mixing technique. These blends are characterized for their
morphology, structural, thermal and mechanical properties. Though our FTIR and
XRD results show weak interactions between PC and PS phases, however, DSC and
morphological study reveals that pristine PC/PS blends are immiscible. On other
hand, introduction of organoclay results compatibilization of two polymer
phases which is supported by significant shift in glass transition temperatures
of the component phases and a distinct morphology having no phase segregation
on sub-micron scale. Intercalation of polymers inside the clay gallery is
achieved and is supported by XRD studies. A better thermal stability and higher
value of modulus of the compatibilized blends compared to pristine PC/PS blends
also support the reinforcement effect of organoclay to the PC/PS blend matrix.
