Table 1. Self-Diffusion Coefficients of PNIPAM in Different Electrolyte Solutions in D2O.
D (10–11 m2/s)a |
||||||
---|---|---|---|---|---|---|
c (M) | NaSCN | NaClO4 | NaI | NaCl | NaF | Na2SO4 |
0.01 | 2.213 | 2.233 | 2.200 | 2.227 | ||
0.05 | 2.200 ± 0.010 | 2.227 | 2.202 | 2.189 | 2.198 | 2.260 |
0.1 | 2.193 | 2.210 | 2.201 | 2.208 | ||
0.2 | 2.198 | 2.267 | 2.245 | 2.191 | ||
0.3 | 2.203 | 2.282 | 2.230 | 2.182 | ||
0.4 | 2.199 | 2.275 | 2.215 | 2.221 ± 0.014 | ||
no salt | 2.215 ± 0.007 |
The stated errors are from experiments repeated in triplicate. The resulting conservative estimate of the error in diffusion experiments in this instrumental regime is on the order of ±0.7%.