AMPHIPHILIC POLY(ACRYLAMIDE)S HAVING SATURATED AND UNSATURATED DIALKYL CHAINS AND PHOSPHATIDYLCHOLINE GROUPS IN THE SIDE-CHAINS

A novel phosphatidylcholine analogous vinyl monomer 1-(acrylamidomethy l)-2'-(trimethyl ammonio)ethyl phosphate (AMP) was synthesized and cha racterized. A series of amphiphilic poly(acrylamide)s were obtained fr om AMP, and some dialkylacrylamide monomers, by radical copolymerizati on in the presence of alpha,alpha'-azobis(isobutyronitrile) (AIBN). Th e polyelectrolyte behavior of these copolymers was investigated by the ir viscosity measurements. Moreover, the structures in condensed phase s and thermal properties of these copolymers were investigated by X-ra y analysis, DSC measurement, and POM observation. In addition, the pha se transitions of monolayers obtained from these amphiphilic copolymer s were observed by changing the temperature of the subphase, length of the alkyl chains, and observation times (t(ob)). The LB films were pr epared by using the vertical dipping method, and their surface contact angles with pure water were also measured.