双金属氰化物配合物的制备、表征及催化性能  

Preparation, Characterization and Catalytic Performance of Double Metal-Cyanide Complexes

作　　者：黄亦军[1] 戚国荣[1] 封麟先[1] 

机构地区：[1]浙江大学高分子科学与工程系,浙江杭州310027

出　　处：《催化学报》2002年第2期113-117,共5页

摘　　要：制备了基于钴氰化锌的双金属氰化物配合物 (DMC)催化剂 ,并用元素分析、X射线衍射和红外光谱等手段进行了表征 ,考察了催化剂的结构与组成对其催化活性的影响以及该催化体系催化环氧烷烃开环聚合的特点 .结果表明 ,含ZnCl2 和叔丁醇的非晶态DMC催化剂具有最高的催化活性 .该催化体系使聚合物的分子量可控 ,不饱和度很低 (<14 μeq/g) ,逐步聚合所得到的聚合物的分子量分布较窄 (Mn/Mw<1 4 8) .13 CNMR分析结果表明 ,甲基氧丙环均聚物的链结构具有无规立构的特点 ,且链节分布几乎都为头 尾方式 .IR分析结果表明 ,甲基氧丙环Double metal-cyanide (DMC) complexes based on Zn-3[Co(CN)(6)](2) were prepared and characterized by elemental analysis, XRD and IR. The effects of structure and composition of the catalysts un catalytic performance were investigated. The results revealed that the substantially amorphous catalyst, including ZnCl2 and t-BuOH, is most active. The polymerization of propylene oxide and the copolymerization of ethylene oxide and propylene oxide with DMC as a catalyst have been performed. The molecular mass of the polymers can easily be adjusted by the ratio of monomer to initiator. The polymers have narrow molecular mass distribution ( < 1.48) and low unsaturation ( < 14 mueq/g). The microstructure of the polymer was detcrmined by C-13 NMR and IR techniques. The polyoxypropylene has atactic structure and head-to-tail regiosequence, and the copolymer has a random distribution of composition.

关 键 词：双金属氰化物配合物 催化活性 甲基氧丙环 环氧乙烷 开环聚合 链结构 共聚物 催化剂 

分 类 号：O643.3[理学—物理化学]