ABSTRACT
Optical properties play an important part in the characterization of polymer blends. A blend of two amorphous polymers with complete miscibility would generally be clear. However, immiscibility or partial miscibility (compatibility) leads to a system with two phases and if the refractive indices of two phases are different the blend would appear hazy. As in the case of semi-crystalline polymers, the blend would be clear if the size of the dispersed phase domains are considerably smaller than the wavelength of light. Similar effects are seen in block and graft copolymers when two immiscible components form two phases.
