| 摘要 |
A compound comprising the reaction of a titanium, zirconium, hafnium or aluminium compound, selected from an alkoxide, a condensed alkoxide, a halide, haloalkoxide, amide or oxyhalide with a carbohydrate, such as a monosaccharide containing a 5- or 6- membered carbon chain or cyclic system or a disaccharide or polysaccharide based on a 5- or 6-membered carbon chain or cyclic system is used as a catalyst for the ring-opening polymerisation of a cyclic organic compound, such as a lactone, lactam, cyclic ether, cyclic carbonate, cyclic carbamate or lactide. Also disclosed is a polymerisable mixture comprising at least one lactone, lactam, cyclic ether, cyclic carbonate, cyclic carbamate, lactide or other cyclic compound which is susceptible to ring opening polymerisation, and a catalyst comprising a complex formed from the reaction of a titanium, zirconium, hafnium or aluminium compound with a carbohydrate. |
