Amine base optimization for dehydrohalogenation polymerizationa.
| |||||
|---|---|---|---|---|---|
| Entry | Base | Time (h) | M n/Mw (kDa) | X n/Xw | Đ |
| 1 | Diisopropylamine | 1 | 12/18 | 11/16 | 1.5 |
| 2 | Tetramethylethylenediamine | 1 | 11/14 | 10/13 | 1.2 |
| 3 | Diisopropylethylamine | 1 | 12/18 | 11/16 | 1.5 |
| 4 | Pyridine | 1 | 9/11 | 8/10 | 1.2 |
| 5 | Piperidine | 1 | 11/16 | 10/15 | 1.4 |
| 6 | Triethylamine | 1 | 14/21 | 13/19 | 1.5 |
a
Where Mn is the number average molecular weight, Mw is the weight average molecular weight, Xn is number average degree of polymerization, Xw is weight average degree of polymerization and Đ is the polydispersity index. All reactions were performed with 10 mg of N6P-Br (1 eq.) at RT. All GPCs were reported after washing with MeOH/diethyl ether. Polymer molecular weights were determined using gel permeation chromatography (tetrahydrofuran as the eluent) against polystyrene standards.