Interest about the modification of properties of traditional thermoplastics with addition of thermotropic liquid crystalline polymers (LCP) is determined by two main aspects: decrease of viscosities, substantially relieving processing of the compositions, and considerable increase of mechanical properties due to formation of the reinforcing LCP fibrills in the isotropic matrix [1]. Deformation of LCP causes pronounced orientation of it labile structure. In extrusion or injection molding specific reinforcment (so-called self-reinforcment) occur in the blends containing LCP due to elongation of the disperse LCP phase and formation of the anisodiametrical ellipsoids (threads). The effect of self-reinforcment is especially pronounced by extruding and successively drawing the blends, containing considerably amount of LCP (30% and more) [2].