Abstract: A side-chain liquid crystal 4-allyloxybenzoyl-4’-hydroxyl-p-biphenyl ester (M) was synthesized using an in-situ polymerization method. Then we grafted different amounts of carbon nanotubes (CNTs) onto it. A series of liquid crystalline polymers generated liquid crystal composite materials because of polymerization reaction. The liquid crystalline composites were characterized by polarized optical microscopy， scanning electron microscopy and differential scanning calorimetry (DSC). The results show that a little CNTs are well dispersed in the liquid crystalline composites matrix， and they cannot change the texture of the original polymer. The DSC results show that the clear point and mesomorphic temperature range increase with the adding of CNTs.

Key words: composite material, nematic phase, liquid crystalline polymer, carbon nanotube, graft