Table 2. Target PNMEP DPs, Conversions, Molecular Weights (Mn), and Dispersities (Mw/Mn) Obtained for PMAA85–PNMEPx (M85-Nx) Diblock Copolymers Prepared at 25% w/w Solids and the Corresponding PMAA85 Macro-CTA.
| DMF GPCb |
|||||
|---|---|---|---|---|---|
| diblock composition | target PNMEP DP | conva (%) | Mn (kg mol–1) | Mw/Mn | |
| 1 | M85 macro-CTA | 84 | 8.60c | 1.21c | |
| 2 | M85-N294 | 300 | 98 | 50.1c | 1.27c |
| 3 | M85-N495 | 500 | 99 | 73.5c | 1.35c |
| 4 | M85-N1000 | 1000 | >99 | 129.8c | 1.56c |
| 5 | M85-N1500 | 1500 | >99 | 169.7c | 1.75c |
| 6 | M85-N1940 | 2000 | 97 | 226.6c | 2.32c |
| 7 | M85-N2758 | 3000 | 92 | 331.7c | 2.05c |
| 8 | M85-N3760 | 4000 | 94 | 481.6c | 2.35c |
a
Monomer conversions determined by 1H NMR spectroscopy in d4-methanol.
b
Determined by DMF GPC against a series of near-monodisperse PMMA calibration standards using a refractive index detector (n.d. = not determined).
c
After exhaustive methylation using (trimethylsilyl)diazomethane.