Table 5.
Molar mass, RG, RH, and A2 of PMMA100 in various solvents, obtained by SEC/MALS/QELS/DRI and off-line MALS and QELS.
| THF:MIAK | Mn | Mw | Mw (off-line) | Mz | Ð | RH,z | RH,z (off-line) | A2 ( × 10−4, off-line) | % Recovery |
|---|---|---|---|---|---|---|---|---|---|
| 100:0 | 101000 ± 1000 | 101000 ± 1000 | 100000 | 102000 | 1.00 ± 0.01 | 7.0 ± 0.3 | 7.5 ± 0.2 | 2.19 ± 0.002 | 97 ± 1 |
| 75:25 | 96000 ± 2000 | 97000 ± 2000 | 101000 ± 1000 | 98000 ± 2000 | 1.01 ± 0.03 | 6.4 ± 0.1 | 7.1 ± 0.4 | 2.37 ± 0.03 | 104 ± 3 |
| 50:50 | 100000 ± 1000 | 100000 | 102000 ± 1000 | 100000 ± 1000 | 1.00 ± 0.01 | 6.1 ± 0.3 | 6.6 ± 0.1 | 2.04 ± 0.04 | 101 |
| 25:75 | 101000 | 101000 | 102000 | 101000 | 1.00 | 6.2 ± 0.5 | 7.3 ± 1.3 | −29.1 ± 3.1 | 108 |
| 0:100 | – | – | – | – | – | – | – | – | – |
All values determined by on-line SEC/MALS/QELS/DRI, unless noted as “off-line.” Molar masses in g mol−1, RH,z in nm, A2 in mol mL g−2. Averages and standard deviations are based on at least triplicate analyses; where no value is given, it represents a precision of less than ±1000 g mol−1 for molar mass, less than ±0.01 for Ð, and less than ±1% for % Recovery. For off-line analyses, precisions represent instrumental standard deviation. See section 2 for details. No values given at 0:100 THF:MIAK due to the insolubility of this sample in 100% MIAK; see Section 3.6 for discussion.