SAX (Small-Angle X-ray Scattering) Study of Micelle Formation in Mixtures of Butadiene Homopolymer and Styrene-Butadiene Block Copolymer. 3. Comparison with Theory.
Abstract
The theory of block copolymer micelle formation formulated by Leibler, Orland and Wheeler is compared with the experimental results of Rigby and Roe obtained with mixtures of styrene-butadiene diblock copolymer and butadiene homopolymer. To facilitate the comparison, the theoretical expressions are recast in terms of the molecular volume v and the rms end-to-end distance r, thereby avoiding the use of the concept of the segment size a and the number of segment N per molecule. The calculated radii of the micelles show excellent agreement with the observed values. The theory predicts correctly the trend of change in the critical micelle cores to consist predominantly of styrene blocks, whereas the experimental results indicate that above a certain temperature that micelle cores become increasingly swollen with polybutadiene as the temperature is raised toward the dissolution temperature.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1986
- Accession Number
- ADA163149
Entities
People
- R. J. Roe
Organizations
- University of Cincinnati