Abstract: A fully aromatic liquid crystalline polyester (TLCP) was blended with poly(ether ether ketone), PEEK. Random copolymer (RCP) was used as the compatibilizer in the blends. The isothermal crystallization kinetics and morphologies of compatibilized blends were studied with differential scanning calorimetry (DSC） and polar light micrograph (PLM). TLCP acted as a heterogenous nucleation sites to accelerate the crystallization of PEEK. However, PEEK crystallization rate decreased with increasing TLCP fraction. Isothermal crystallization exotherms showed that the addition of RCP showed no significant influence on the crystallization of PEEK in blends. PLM observation showed that it was difficult to discern the single PEEK spherulites.

Key words: poly(ether ether ketone),  thermotropic liquid crystalline polyester, blends, compatibilizer, isothermal crystallization, spherulites 