A new type of methacrylate bearing a phosphorylcholine analogous moiety, 2-[2 '-(trimethylammonium)-1 ' -methylethyl-phosphoryl]ethyl methacrylate (TMPM) was synthesized. TMPM was radically homopolymerized and copolymerized with BMA to obtain the polymers. The critical micelle concentration (CMC) of TMPM was 4.9 X 10(-2) mol/l according to the fluorescent probe method.