Library of alternating and statistical styrene–propylene and styrene–ethylene copolymers prepared by RAFT copolymerizations of the corresponding saccharin (meth)-acrylamide followed by hydrolysis and photocatalytic decarboxylation.
| Entry | Copolymer | Copolymer compositiona StyX/P or E (mol%) | Catalyst | M n,app b (g mol−1) | Đ b | T g c (°C) | T g breadthc (°C) |
|---|---|---|---|---|---|---|---|
| 1 | P(Sty-alt-P) | 50/50 | A1 | 9800 | 1.15 | 71 ± 1 | 17 |
| 2 | P(Sty-stat-P) | 54/46 | A1 | 12 000 | 1.39 | 63 ± 1 | 20 |
| 3 | P(StyOMe-alt-P) | 51/49 | A1 | 12 300 | 1.21 | 70 ± 1 | 14 |
| 4 | P(StyOMe-stat-P) | 51/49 | A1 | 8000 | 1.23 | 64 ± 1 | 17 |
| 5 | P(StyCl-alt-P) | 50/50 | A1 | 10 600 | 1.32 | 110 ± 1 | 19 |
| 6 | P(StyCl-stat-P) | 47/53 | A1 | 14 500 | 1.37 | 80 ± 0 | 20 |
| 7 | P(Sty-alt-E) | 50/50 | A2 | 9700 | 1.37 | 26 ± 1 | 13 |
| 8 | P(Sty-stat-E) | 47/53 | A2 | 14 800 | 1.30 | 24 ± 0 | 16 |
| 9 | P(StyOMe-alt-E) | 50/50 | A2 | 9600 | 1.69 | 39 ± 2 | 17 |
| 10 | P(StyOMe-stat-E) | 54/46 | A2 | 10 500 | 1.19 | 46 ± 0 | 20 |
| 11 | P(StyCl-alt-E) | 50/50 | A2 | 11 000 | 1.22 | 47 ± 1 | 18 |
| 12 | P(StyCl-stat-E) | 49/51 | A2 | 8800 | 1.34 | 56 ± 0 | 21 |
a
Copolymer composition was determined by 1H NMR spectroscopy of the copolymer before decarboxylation.
b
Apparent molecular weights and dispersities were estimated by SEC in N,N-dimethylacetamide with a polystyrene calibration.
c
Glass transition temperatures and breadths were determined by differential scanning calorimetry (DSC).