Abstract
Blends of an engineering plastic; polycarbonate (PC) and a liquid crystalline polymer; random copolymers of the poly(ethylene terephthalate) and the poly(hydroxybenzoic acid) were prepared in an internal mixer. Fibers were extruded from the capillary rheometer and spin-drawn at varying draw ratios. The morphology and the mechanical properties were investigated by DSC, SEM, polarizing optical microscopy, X-ray diffraction, and tensile tests. SEM studies revealed that the liquid crystalline polymer (LCP) formed finely dispersed spherical domains with a diameter of 0.2—2.0 micron in the PC matrix and the inclusions were deformed from the spherical droplets to fibrils as the draw ratio increased. The interphase adhesion between the two polymers was good and therefore it was confirmed that the LCP could act as a reinforcement of PC.
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