| Abstract: | This paper reports the main results of the studies carried out in our laboratory on various kinds of polymer aggregation in aqueous and organic solutions. (1) In solutions of a polymer blend with controllable hydrogen bonding, a transition from individual polymer coils to intermolecular complex is observed as the hydrogen bonding interaction increases to a certain level. This is found to be a general phenomenon of polymer blends in which hydrogen bonding is adjustable. (2) A new kind of aggregation behavior of block ionomers based on SEBS is found and studied by fluorospectroscopy. The results explore that the block ionomer can form dispersion of hydrophobic aggregates in water stabilized by rare ionic groups. (3) Fluorocarbon-containing PNIPAM in water establishes hydrophobic association. Fluorocarbon-modified pyrene (PycoRf) is found to be qualified to serve as a fluorescent probe to monitor the association. |
