文中利用双金属催化剂（DMC）催化二氧化碳和环氧乙烷共聚,催化效率最高达到1139g/g催化剂,远远高于以前报道,其中碳酸酯键含量最高可达50%。实验发现,催化剂浓度是影响催化效率的重要因素,而温度的高低基本决定了碳酸酯键含量的多少。文中还研究了聚碳酸亚乙酯的体外降解性能,在降解液中经历大约70 d后,共聚物几乎全部降解为二氧化碳和低分子量聚乙二醇。
Copolymerization of carbon dioxide and ethylene oxide（EO） using Co-Zn double metal cyanide complex（DMC） catalyst was carried out and the highest catalytic efficiency could be 1139 g of polymer/g of catalyst,which was higher than reported ever before.And the highest carbonate content of the copolymer could be up to 50%.It is found that catalyst concentration is the important factor in high catalytic efficiency and temperature influences carbonate content.We also studied the degradation performance of poly（ethylene oxide） in vitro.About 70 days later,almost all the copolymer degraded into carbon dioxide and polyethylene glycol with low molecular weight.
参考文献
| [1] | De Lisi R;Lazzara G;Milioto S;Muratore N .A thermodynamic study to evidence the alpha,omega-dichloroalkane/block copolymer mixed aggregates formation: Effect of the copolymer architecture[J].Journal of Colloid and Interface Science,2006(1):368-374. |
| [2] | Pavel Schmidt;Jiri Dybal;Adriana Sturcova .ATR FTIR investigation of interactions and temperature transitions of poly(ethylene oxide), poly(propylene oxide) and ethylene oxide-propylene oxide-ethylene oxide tri-block copolymers in water media[J].Vibrational Spectroscopy: An International Journal devoted to Applications of Infrared and Raman Spectroscopy,2009(2):218-225. |
| [3] | 方兴高,杨淑英,陈立班.聚碳酸亚丙亚乙酯的合成和生物降解[J].功能高分子学报,1994(02):143-147. |
| [4] | Chen S;Hua ZJ;Fang Z;Qi GR .Copolymerization of carbon dioxide and propylene oxide with highly effective zinc hexacyanocobaltate(III)-based coordination catalyst[J].Polymer: The International Journal for the Science and Technology of Polymers,2004(19):6519-6524. |
| [5] | 陈立班,倪尔葭,扬淑英,彭汉,黄晓兰,方兴高.从GPC和特性粘数计算高聚物各种平均相对分子质量的新方法[J].分析测试学报,1995(03):24-28. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%