Ionomers are a new class of ion-containing polymers which have ions in concentrations up to 10-15%, randomly distributed in nonionic backbone chains, and have been widely studied in the solid state.1-3 Recently, the solution properties of ionomers have begun to be studied4-10because of their unique properties: (1) in nonpolar solvents, ionomers show aggregation behavior due to dipole-dipole attractions between ion pairs; (2) in polar solvents, they show polyelectrolyte behavior due to the repulsion between fixed ions in polymer chains. Even ionomers with only a few percent of ions show characteristic polyelectrolyte behavior. Lundberg et al.5 studied this polyelectrolyte behavior using viscosity measurements; the reduced viscosity increased remarkably with decreasing polymer concentration. MacKnight et al.10studied the polyelectrolyte behavior using neutron scattering; the scattering curves exhibit a broad single maximum. Here, we study the polyelectrolyte behavior of an ionomer (lightly sulfonated polystyrene) in a polar solvent (DMF) using light scattering measurements.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry