Table 1.
Critical swelling pH (pHcr), hydrodynamic diameter (DH) and ζ-potential in the swollen and collapsed state, and molecular weights between crosslinks (Mc) and mesh sizes (ξ) in the swollen state for different crosslinking mole feed ratios (X)
| X | pH cr | D H (nm) pH=6 | D H (nm) pH=8 | ζ (mv) pH=6 | ζ (mv) PH=8 | M c | ξ (nm) |
|---|---|---|---|---|---|---|---|
| 0.01 | 7.60 | 141 ± 2 | 99 ± 1 | 32 ± 4 | 4.7 ± 3 | 4414 | 9.90 |
| 0.025 | 7.59 | 111 ± 2 | 68 ± 1 | 25 ± 5 | -1 ± 4 | 1915 | 5.04 |
| 0.05 | 7.38 | 107 ± 1 | 76 ± 1 | 20 ± 6 | -1 ± 6 | 1766 | 4.74 |
| 0.10 | 7.31 | 99 ± 1 | 78 ± 1 | 14 ± 2 | -1 ± 2 | 1302 | 3.80 |