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pKa Analysis of Derivatives
| polymer | pKa1 | pKa2 | macroscopic behavior |
|---|---|---|---|
| SMA-Glu | 7.4 | no precipitated observed | |
| SMA-Neut | 6.4 | 10.4 | no precipitated observed |
| SMA-AE | 9.5 | above pH 2.3, the undissolved material swells and forms a gel-like phase. Below pH 2.3, the transparent solution becomes cloudy, and the nebulous material settles to bottom within 24 h. | |
| SMA-Pos | 6.3 | 9.7 | cloudy solution quickly clarifies when moving from pH 5.63 to pH 6.30. |
