Phenolphthalein polyether-ether ketone (PEK-C) containing 10% thermotropic liquid crystalline polymer (LCP) were prepared by melt-blending. Rheological properties of blends were studied using cone plate rheometer

the activation energy for flow process (E) was calculated from the Arrhenius equation

its value was rapidly decreased from 223. 5 KJ/mol to 102. 2 KJ/mol when the shear rate increases from 0.11 s-1 to 1.17 s-1. Glassy transition temperature of PEK-C in the blends lowered from 218℃ to 199℃ comparing with neat PEK-C.Mechanical properties

except modulus

of PEK-C did not change significantly after blending with LCP.It was shown from results of SEM that the LCP in the blends was present in a dis-crete phase

and diameter of LCP was about l μm. The droplets of LCP scattered throughout the polymer matrix.