Abstract: From four thermotropic liquid crystalline polymers (TLCP) and polypropylene, poly(butylene terephthalate), polycarbonate,polyethersulfone and polysulfone, six polyblends containing TLCP were melt blended and extruded in the temperature range of respective "processing window". With the help of rheometry, scanning electron microscopy, polarized light microscopy and dynamic mechanical spectroscopy,the microstructure formation,and contribution of component characteristics, melt viscosity, extrusion temperature and concentration to the anisotropic microstructure formation and fibril-in-duced crystallization of matrix polymer and interphasial interaction were investigated.

Key words: liquid crystalline polymer, polymer blend, in-situ composite, thermoplastics