Abstract
Amphiphilic acrylamide monomer containing a cholesterol moiety as a hydrophobic group and a phosphatidylcholine analogue as a hydrophilic group was synthesized in high yield. Radical polymerization was carried out in the presence of α,α′-azobisisobutyronitrile (AIBN) as initiator. The obtained monomer and homopolymer were characterized by 1H-NMR, IR and melting point, respectively. The packing structure and thermal properties of the obtained polymer were investigated by X-ray diffraction analysis, DSC measurement and polarizing microscopy observation. It has been proposed that the homopolymer consists of a stacked bilayer structure in a smectic liquid crystalline phase over a wide temperature range. In addition, the monolayers of monomer and homopolymer on the surface of water were investigated at different temperatures and different subphase pH. The optimum condition for preparing stable and order monolayer has been determined as 10 °C and pH 4.0 for a monomer, and over a wide range of temperature (10–30 °C) and pH (pH 4.0–10.0) for a homopolymer.
Published Version
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