Abstract
The aggregation behavior in dilute aqueous solutions of a series of poly(butadiene-b-sodium methacrylate) copolymers, produced from the corresponding anionically synthesized poly(butadiene-b-tert-butyl methacrylate) copolymers, was investigated by static and dynamic light scattering. Micellar characteristics, including aggregation number, size, and polydispersity, were found to depend on the molecular weight and the composition of the copolymers. In addition to spherical micelles, supramicellar aggregates were also detected in the case of very short corona blocks. Measurements at different temperatures indicated a decrease in the size of the spherical micelles by increasing temperature, probably due to worsening of the thermodynamic quality of water toward the micellar corona. The presence of a small amount of NaCl in the solutions affects the structural characteristics of the aggregates, as indicated by an increase in the aggregation number and size of the micelles. However, small structural changes where observed as a function of salt concentration in the region 0.1 to 1.0 M NaCl.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 8732-8737 |
| Number of pages | 6 |
| Journal | Macromolecules |
| Volume | 36 |
| Issue number | 23 |
| DOIs | |
| State | Published - Nov 18 2003 |
| Externally published | Yes |
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry