Table 2. PVA-b-PVP Block Copolymers.
| PVAc-b-PVP | [M]/[mCTA]a | conv.b (%) | Mn,NMRc (g mol–1) | Mn,SECd (g mol–1) | Mw/Mnd | PVAce DP (−) |
|---|---|---|---|---|---|---|
| PVAc20-b-PVP30 | 20 | 96.8 | 5050 | 3400 | 1.47 | 20 |
| PVAc18-b-PVP55 | 500 | 15.6 | 7650 | 5400 | 1.35 | 18 |
| PVAc32-b-PVP70 | 1000 | 11.2 | 10520 | 9130 | 1.36 | 32 |
| PVAc37-b-PVP70 | 2000 | 6.1 | 10950 | 9650 | 1.38 | 37 |
a
[Total monomer]/[RAFT agent] ratio; polymerizations conducted in 2 M monomer solutions in dioxane.
b
Determined by 1H NMR spectroscopy. Theoretical Mn determined from the monomer to RAFT agent ratio.
c
Determined by 1H NMR of the copolymers after precipitation and drying.
d
Determined by SEC in DMF using PMMA standards.
e
Determined by 1H NMR spectroscopy of the PVP-b-PVAc block copolymers.