Table 3.
The selected polymerization conditions for lignin-PDMAEMA copolymers 1.
| Lignin PDMAEMA | Initiator | Initial [M]0/[I]0/[Cu]0/[L]0 4 |
Monomer (mmol) |
Reaction Medium | Yield (%) |
|---|---|---|---|---|---|
| LP-01 | LnMI-a (MD = 3.0%) | 100:1:1:1 | 5.0 | DMF/3 mL | 23 |
| LP-02 | 200:1:1:1 | 10.0 | DMF/3 mL | 17 | |
| LP-03 | LnMI-d (MD = 27.6%) | 10:1:1:1 | 1.3 | THF/5 mL | 42 |
| LP-04 | 20:1:1:1 | 2.6 | THF/5 mL | 38 | |
| LP-05 | 30:1:1:1 | 3.9 | THF/5 mL | 42 | |
| LP-06 | 50:1:1:1 | 6.5 | THF/5 mL | 46 | |
| LP-07 | 100:1:1:1 | 13.0 | THF/5 mL | 26 | |
| LP-08 2 | 100:1:1:1 | 13.0 | Dioxane/3 mL | / | |
| LP-09 2 | 100:1:1:1 | 13.0 | Dioxane/4 mL | 57 | |
| LP-10 | LnMI-b (MD = 5.2%) | 50:1:1:1 | 1.45 | Dioxane/2 mL | 36 |
| LP-11 | 100:1:1:1 | 2.9 | Dioxane/2 mL | 56 | |
| LP-12 | LnMI-e (MD = 36.7%) | 50:1:1:1 | 6.5 | Dioxane/4 mL | 38 |
| LP-13 | 100:1:1:1 | 13.0 | Dioxane/4 mL | 59 | |
| LP-14 3 | LnMI-f (MD = 44.4%) | 50:1:1:1 | 6.5 | Dioxane/4 mL | 21 |
| LP-15 3 | 100:1:1:1 | 13.0 | THF/4 mL | 28 | |
| LP-16 3 | 100:1:1:1 | 13.0 | Dioxane/4 mL | 44 | |
| LP-17 | LnMI-g (MD = 70.8%) | 100:1:1:1 | 13.0 | Dioxane/4 mL | 38 |
| LP-18 | LnMI-h (MD = 100%) | 50:1:1:1 | 6.5 | Dioxane/4 mL | 43 |
| LP-19 2 | 100:1:1:1 | 18.0 | Dioxane/3 mL | 49 | |
| LP-20 | LnMI-c (MD = 20.2%) | 70:1:1:1 | 18.0 | Dioxane/3 mL | 55 |
1 The ATRP reaction was carried out at 65 °C for 2 days under N2 atmosphere. However, for LP-08 and 19, the ATRP reaction was carried out for 2 h and 1 h, respectively instead. 2 LP-08, 09 and 19 were treated with dilute HCl aqueous solution (0.1 M) to further improve their water solubility. 3 Data for LP-14,15 and 16 were reported previously [18]. 4 [M]0, [I]0, [Cu]0 and [L]0 represent the initial molar concentrations of monomer, total initiation sites, CuBr and HMTETA, respectively.