Table 1.
The molar ratios applied in the polymerization of N-isopropylacrylamid (NIPAM), monomer conversions, number-averaged molar masses (Mn) and polydispersity indices from Size-Exclusion Chromatography (SEC) analyses. All polymerizations were carried out in isopropanol (NIPAM/isopropanol = 1:2 w/w) at room temperature.
| Sample | Time [h] | [I]/[M]/[CuCl]/[L] a | Conv b [%] | Mn [Da] | Theoretical d Mn [Da] | PDI (Mw/Mn) |
|---|---|---|---|---|---|---|
| P1 | 3 | 1:50:1:1 | 35.2 | 2150 c | 1990 | 1.14 c |
| P2 | 4 | 1:50:1:1 | 40.2 | 2200 c | 2270 | 1.17 e |
| P3 | 5 | 1:50:1:1 | 61.0 | 3300 c | 3050 | 1.13 c |
| P4 | 22 | 1:50:1:1 | 87.2 | 4100 c | 4900 | 1.14 c |
| P5 | 23 | 1:50:1:1 | 89.2 | 4900 | 5050 | 1.11 c |
| P6 | 2 | 1:200:1:1 | 63.8 | 11700 c | 14400 | 1.31 c |
a I = NCPAE, M = NIPAM, L = Me6TREN; b as determined gravimetrically; c from SEC in 1% (w/v) LiBr/DMF; d calculated as Mn = conv × ([M]/[I]) × MNIPAM; e determined from SEC in THF.