Liquid crystalline block; and graft copolymers were synthesized according to the macroinitiator and macroinimer concept. For this purpose: side chain block copolymers (polytetrahydrofuran-b-polymethylmethacrylate), having liquid crystalline 4,4＇-cyanobiphenyl blocks were prepared and characterized. Unlike the liquid-crystalline homopolymer with mesogenic units in the side chain, all block and graft copolymers showed a smectic A mesophase. The transition temperatures are hardly affected by;the composition and molecular weight of the block copolymers.