Abstract
For describing anisotropic behaviour of the material, thermotropic and lyotropic liquid crystalline polymers were investigated by polariscope to take microstructural photos. Experimental investigation on the rheological and rheo-optical behaviour of the HPC was reported. The HPC was used in a extrusion test, a small contraction, nearly planar extrudate and resonance instability due to shear disturbance were observed when the lyotropic LC polymer HPC solution was extruded. A simple stability theory of orientational motion of director vector was developed for the LC polymer fluid that extended flow of thermotropic LC polymer melts is very effective in producing a high degree of macroscopic orientation.
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