Aqueous Size Exclusion Chromatography of Random, Diblock, and ABC Triblock Methacrylic Polyampholytes
✍ Scribed by Costas S. Patrickios; Justin A. Strittmatter; Walter R. Hertler; T.Alan Hatton
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 73 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
utilization of polyampholytes in these processes offers the Aqueous size exclusion chromatography (SEC) at 1 M KCl important potential process-scale economic advantage of and pH 8.5 was employed to probe the aggregation behavior of ease of polymer recycling and reuse. methacrylic polyampholytes. In agreement with earlier results ob-In addition to static and dynamic light scattering, and tained by light scattering techniques, shorter retention times were steady-state pyrene fluorescence techniques employed (1) to measured for the triblocks consistent with larger hydrodynamic probe the micellization of the methacrylic polyampholytes, it size and, therefore, chain aggregation into micellar structures; the was considered prudent to perform size exclusion chromatwo random terpolymers and the diblock polyampholyte showed tography (SEC) in water. The SEC confirmation of the reno aggregation behavior as their retention times corresponded closely to the expected single-chain molecular weights. Micellar sults obtained by the other characterization methods will be aggregation numbers were estimated to be within the range from very useful. 10 to 40.