INFLUENCE OF PH AND PRESENCE OF CU2+ IONS ON THE PROPERTIES OF POLYACRYLOYLACETONE (PAA) MONOLAYERS

The influence of pH on the properties of polyacryloylacetone (PAA) mon olayers at air/water interface was examined by using surface pressure- area isotherm measurement,a new rheological approach and AFM imaging. The isotherms and AFM-imaging detect phase transitions in PAA monolaye rs and growth of microdomains during compression in the case of pH 6.6 and missing of such kind of structures at pH 9. The rheological study below and above the phase transition shows an existence of a large re laxation time related to the process of formation of microdomains. The influence of divalent ions on the properties of a PAA monolayer was s tudied. The presence of Cu2+ ions leads to polymer - ion interaction w hich results in the formation of microdomains.