LANGMUIR-BLODGETT-FILMS OF POLYMER COLLOI D COMPLEXES

The amphiphilic compound beta-N-dimethylamino-4-dodecyloxypropiophenon e (DADPPh) was used to prepare LB films. Formation of a complex betwee n DADPPh, layered from a chloroform solution (1 mg/ml), and polyacryli c acid dissolved in the subphase (10(-2) - 10(-5) mol/l) was found to be the major feature enabling formation of these films. Monolayers of the polycomplex were transferred onto a hydrophobic silicon support us ing the Langmuir-Blodgett technique at a surface pressure pi = 28 mN/m . Increasing the concentration of polyacrylic acid in the subphase inc reased the area per DADPPh molecule in the monolayer and decreased the pressure of collapse. The principal structural element of the LB film s was the bilayer composed of molecules of chemically bound amine, whi ch predominantly align normal to the layer plane.