• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Polyurethanes technical conference >Ultra Low Monol Polyols Produced by Ring-Opening Polymerization of Propylene Oxide Catalyzed by Nano-Sized Double Metal Cyanide Catalysts Bearing Different Co-Complexing Agents
【24h】

Ultra Low Monol Polyols Produced by Ring-Opening Polymerization of Propylene Oxide Catalyzed by Nano-Sized Double Metal Cyanide Catalysts Bearing Different Co-Complexing Agents

机译：纳米级双金属氰化物催化剂负载不同共配合剂催化环氧丙烷开环聚合制得的超低单醇多元醇

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polymerization of propylene oxide (PO) have been carried out by using nano-sized double metal cyanide (DMC) catalyst prepared by reacting ZnC12 and K3[Co(CN)6]2 in the presence of tert-butyl alcohol as a main complexing agent (CA) and various polymeric co-complexing agents such as poly(tetramethylene ether glycol), polypropylene glycol, polyethylene glycol, poly(ethylene oxide),aipoly(propylene oxide), afpoly(ethylene oxide) triblock copolymer EO20PO68EO20 (PI23), and hyperbranched polyglycidol. The resulting DMC catalysts are characterized by elemental analysis, x-ray photoelectron spectroscopy, infrared spectroscopy, x-ray powder diffraction, electron microscopy. The structure of DMC catalysts with an average size ranging from 183.3 nm to 294.2 nm changes from amorphous to crystalline based on the co-complexing agent used. All catalysts show high polymerization activities depending on the type of co-CA and polymerization parameters. Nano-sized DMC catalysts produced polyether polyols with ultra low unsaturation level (0.00151-0.00318 meq./g), high molecular weight (6000-6600 g/mol), narrow molecular weight distribution (1.08-1.26), and low viscosity (384-600 cP).
机译：环氧丙烷（PO）的聚合反应是通过使用纳米级双金属氰化物（DMC）催化剂进行的，该催化剂是在叔丁醇作为主要络合剂的情况下使ZnC12与K3 [Co（CN）6] 2反应制得的（CA）和各种聚合共络剂，例如聚（四亚甲基醚二醇），聚丙二醇，聚乙二醇，聚（环氧乙烷），aipoly（环氧丙烷），afp（环氧乙烷）三嵌段共聚物EO20PO68EO20（PI23）和超支化聚缩水甘油。所得的DMC催化剂通过元素分析，X射线光电子能谱，红外光谱，X射线粉末衍射，电子显微镜来表征。基于所使用的共络合剂，平均尺寸范围为183.3 nm至294.2 nm的DMC催化剂的结构从无定形变为结晶。根据co-CA的类型和聚合参数，所有催化剂均显示出高聚合活性。纳米级DMC催化剂生产的聚醚多元醇具有极低的不饱和度（0.00151-0.00318 meq./g），高分子量（6000-6600 g / mol），窄分子量分布（1.08-1.26）和低粘度（384） -600 cP）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号