Table 1.
Partial sulfonation of polystyrene to prepare the library of SSS copolymers.a
| Copolymerb | Mn (parent polystyrene) | H2SO4/styrene units | Time (h) | DS (%)c |
|---|---|---|---|---|
| SSS-L26 | 3 800 | 0.5 | 3 | 26 |
| SSS-L30 | 3 800 | 1 | 3 | 30 |
| SSS-L36 | 3 800 | 1 | 7 | 36 |
| SSS-H24 | 12 600 | 0.5 | 3 | 24 |
| SSS-H27 | 12 600 | 1 | 3 | 27 |
| SSS-H35 | 12 600 | 1 | 7 | 35 |
| SSS-H38 | 12 600 | 2 | 24 | 38 |
a
Standard reaction conditions: Ac2O/H2SO4 = 2, Ac2O/DCE = 1:1 (v/v), solvent: DCE/CHCl3, 50 °C.
b
Coding reflects the MW of the parent polystyrene (L – low, H – high) and the DS value.
c
Determined by elemental analysis.