SOLID-STATE PHYSICS OPTIMAL SIZE OF HYDROPHOBIC ASSOCIATES IN AQEOUS SOLUTIONS OF HYDROPHOBICALLY MODIFIED POLYACRYLAMIDE

摘要

Hydrophobic association of hydrophobically modified polyacrylamide in aqueous solutions was studied by fluorescence spectroscopy using pyrene as a probe. It is shown that an increase in the amount of associating n-nonylacrylamide units in a polymer leads to the increase in the amount of hydrophobic associates, with the average size of one associate remaining unchanged. Similar regularities are observed in a salt medium as well (in the presence of sodium chloride), however, in this case the average size of associates is much larger.