反应详情

温度

160 °C

A flame dried, 250 mL, round bottom single neck flask was charged with 102.7 grams (0.90 mole) of ε-caprolactone, 10.2 grams (0.10 mole) of trimethylene carbonate, 2.9 mL (40 mmol) of propylene glycol (USP), and 0.10 mL (34 pmol) of a 0.33M stannous octoate solution in toluene. The flask was fitted with a flame dried mechanical stirrer. The flask was purged with nitrogen three times before venting with nitrogen. The reaction mixture was heated to 160° C. and maintained at this temperature for about 18-20 hours. The copolymer was dried under vacuum (0.1 mm Hg) at 80° C. for about 16 hours to remove any unreacted monomer. The copolymer had an inherent viscosity of 0.25 dL/g in HFIP at 25° C. The copolymer was a viscous liquid at room temperature.

1. customA flame dried
2. customThe flask was fitted with a flame
3. customdried mechanical stirrer
4. customThe flask was purged with nitrogen three times
5. temperaturemaintained at this temperature for about 18-20 hours
6. customThe copolymer was dried under vacuum (0.1 mm Hg) at 80° C. for about 16 hours
7. customto remove any unreacted monomer
8. customat 25° C
9. customat room temperature