We have investigated the copolymerization of carbon dioxide and epoxide. In this paper, we wish to report that zinc N-methylated tetraphenylporphyrin catalyzed the alternating copolymerization of carbon dioxide and cyclohexene oxide. Cyclohexene oxide (2.5 g, 25 mmol) and a THF solution (2.5 mL) of zinc N-methylated tetraphenylporphyrin (0.1 mmol) were heated (80°C/78 h) under 50 atm of carbon dioxide with stirring in a autoclave. The infrared spectrum of the reaction mixture showed two strong characteristic absorptions due to a linear carbonate linkage at 1750 and 1280 cm-1. From the 1H-NMR spectrum, the resultant polycarbonate was turned out to be highly alternated with 97% carbonate linkage. The determination of number-average molecular weight of this copolymer was estimated by the GPC chromatography (Mn = 15000, Mw/Mn = 2.5).
|Number of pages||1|
|Publication status||Published - 1 Dec 2005|
|Event||54th SPSJ Annual Meeting 2005 - Yokohama, Japan|
Duration: 25 May 2005 → 27 May 2005
|Conference||54th SPSJ Annual Meeting 2005|
|Period||25/05/05 → 27/05/05|
- Carbon Dioxide