Table 1.
Comparison of PSU molecular masses in varying conditions
| Entry | Conditions | Mw (kDa)* | Mn (kDa)* | PDI* |
| 1 | 1 eq PC, 1.05 eq Li2CO3, 1 eq ArF | 19 | 11 | 1.82 |
| 2 | 1 eq PC, 1.05 eq K2CO3, 1 eq ArF | 16; 30† | 7.4; 27† | 2.09; 1.13† |
| 3 | 1 eq PC, 1.05 eq K2CO3 (18 h), 1 eq ArF (18 h) | <1 | <1 | ND |
| 4 | 1 eq PC, 1.05 eq K2CO3, 1 eq ArF (multigram scale) | 20 | 10 | 1.94 |
| 5 | 1 eq BPA, 1.05 eq K2CO3, 1 eq ArF | 70 | 43 | 1.63 |
| 6 | 1 eq PC, 3.6 eq K2CO3, 1 eq ArF | 4.5 | 2.6 | 1.73 |
| 7 | 1 eq CD pieces, 1 eq K2CO3, 1 eq ArF | 20 | 11 | 1.73 |
ArF, 4,4′-difluorodiphenylsulfone; CD, compact disk; Mw, molecular weight; ND, not determined; PDI, polydispersity index.
*
Measured by GPC against polystyrene standards.
†
Absolute molecular mass measured by GPC coupled with a light scattering detector; differential index of refraction, dn/dc (PSU) = 0.156 [Mw (PC) = 23 kDa; Mn (PC) = 20 kDa; PDI = 1.16; dn/dc (PC) = 0.186].