SYNTHESIS AND PROPERTIES OF POLY(ACRYLAMIDE)S CONTAINING BOTH LONG-CHAIN ALKYL-GROUPS AND PHOSPHATIDYLCHOLINE ANALOGS IN THE SIDE-CHAINS

A series of new phospholipid analogous acrylamide monomers (4a-e) cont aining long alkyl chains as hydrophobic groups and containing phosphat idylcholine analogues as hydrophilic group were synthesized in high yi elds. The homopolymerizations and copolymerization (4b with 4e) were c arried out in the presence of a radical initiator. The structures and thermal properties of these polymers were investigated by x-ray diffra ction analysis, DSC, and polarizing microscopy measurements. It has be en revealed that these homopolymers (5b, 5c, and 5d) which bear satura ted long-hydrocarbon chains in the side chains exhibited not only orde rly stacked bilayer structures at room temperature but also clear liqu id crystalline behavior within a wide temperature range. The viscosity behavior of all polymers was found similar to usual polyelectrolytes in porlar solvent. The polymers obtained were also characterized by H- 1-NMR, IR, and melting point, respectively. (C) 1996 John Wiley & Sons , Inc.