Table 1.
No. of Experiment | Molar ratio of I/ST/DVB/tBA | Temperature | Volume of solvent (mL) | Results of polymerization |
---|---|---|---|---|
1 | 1 : 25 : 125 : 0 | 90 °C | 2 mL | Gelation |
2 | 1 : 25 : 125 : 0 | 70 °C | 2 mL | Controlled |
3 | 1 : 25 : 125 : 0 | 60 °C | 2 mL | No polymer |
5 | 1 : 25 : 125 : 0 | 70 °C | 4 mL | Controlled |
6 | 1 : 25 : 125 : 0 | 70 °C | 0.5 mL | Gelation |
7 | 1 :25 : 0 : 0 | 70 °C | 2 mL | Controlled |
8 | 1 : 0 : 25 : 0 | 70 °C | 2 mL | Gelation |
9 | 1 : 25 : 25 : 0 | 70 °C | 2 mL | Gelation |
10 | 1 : 125 :25 : 0 | 70 °C | 2 mL | Gelation |
11 | 1 : 25 : 125: 125 | 70 °C | 2 mL | Controlled |
a) The feeding amount of disulfide initiator (I), CuBr or 2,2′-bispyridine is fixed at 0.25, 0.5 and 1.0 mmol, respectively;
b) The meaning of ‘controlled’ is that the amount or molecular weight of polymer can be controlled by the temperature, feeding ratio or time of polymerization.