Fluorescence Spectroscopy Studies of Amphiphilic Polyelectrolytes

摘要

Controlling co- and terpolymer microstructure is crucial to establishingstructure-property relationships and design strategies for water soluble polymers for a variety of applications including aqueous sequestration of organic contaminants, phase transfer catalysis and rheology modification in modern formulation. Fluorescence spectroscopy remains one of the most useful techniques for assessing microstructural placement of hydrophobic groups in water soluble polymer systems. In this study terpolymers consisting of acrylamide, acrylic acid and N-1-pyrenyl-sulfonamido)ethylamide MIS) have been synthesized by an aqueous micellar polymerization technique utilizing sodium decyl sulfate (SDS) to solubilize the water insoluble APS monomer. The surfactant to MIS molar-ratio (SMR) was varied to yield terpolymers with identical monomer compositions but varied microstructural placement of the fluorescent MIS units. After neutralization of the carboxylic acid groups, further characterization of these labeled polyelectrolytes was accomplished by viscometry light scattering and fluorescence spectroscopy. jg p.2.