摘要
合成了钴锌双金属氰化络合物(Co-Zn DMC)和铁锌双金属氰化络合物(Fe-Zn DMC),元素分析和粉末X射线衍射对其表征结果为高结晶度DMC催化剂。用这两种催化剂分别催化二氧化碳-环氧丙烷共聚,均表现出极高的催化效率,并对产物用红外光谱(IR)、核磁共振(1H-NMR)、差示扫描量热(DSC)等方法进行表征。100℃反应15h,Co-Zn DMC的催化效率达7000gPolym/g Cat,碳酸酯键含量为45%,-Mn=35900。80℃反应15h,Fe-Zn DMC的催化效率为410gPolym/g Cat,碳酸酯键含量为71%,M-n=13300。通过DSC分析,共聚物的Tg随碳酸酯键含量的增加明显上升。
A Co-Zn double metal cyanide complex （Co-Zn DMC） and a Fe-Zn double metal cyanide complex （Fe-Zn DMC） were prepared and characterized by elemental analysis and powder X-ray diffraction （XRD）,proved to be highly crystalline DMC catalysts by XRD patterns. These two catalysts were applied in copolymerization of carbon dioxide and propylene oxide （PO）. The resulted copolymers were characterized by infrared spectrum（IR）,hydrogen nuclear magnetic resonance spectrum（^1H-NMR） and differential scanning calorimetry （DSC） measurement. Reaction in 100 ℃ for 15 h,the highest catalytic efficiency of Co-Zn DMC reaches 7000 g Polym/g Cat while the carbonate content is 45%,^-Mn=35900. Reaction in 80 ℃ for 15 h,the highest catalytic efficiency of Fe-Zn DMC reaches 410 g Polym/g Cat while the carbonate content is 71%,^-Mn=13300. DSC results show that the copolymers have a higher glass transition temperature as the carbonate content increases.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第5期5-8,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金面上项目(20274053)
广州市科技攻关引导项目(2007Z3-D0261)
广东省科技攻关项目(2008B010600046)
关键词
二氧化碳
环氧丙烷
共聚
高结晶度
双金属氰化络合物
聚碳酸酯
carbon dioxide
propylene oxide
copolymerization
high crystallinity
double metal cyanide complex
polycarbonates
