NDLI: Silica supported Schiff-base cobaltIII complex-Lewis base system: a highly selective catalyst for alternating copolymerization of CO2 and propylene oxide

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Silica supported Schiff-base cobaltIII complex-Lewis base system: a highly selective catalyst for alternating copolymerization of CO2 and propylene oxide

Content Provider	Scilit
Author	Niu, Yongsheng Li, Hongchun
Copyright Year	2011
Abstract	An binary catalyst system of a silica supported Schiff-base cobalt complex SalenCo^III (OAC)-MCM-41 (Salen = 3-[N,N-bis-2-(3,5-di-tert-butylsalicylidenamino) ethyl] amine) was developed to generate the copolymerization of CO₂ and propylene oxide in presence of (4-dimethylamino)-pyridine (DMAP). The influence of the molar ratio of catalyst components, the operating temperature, reaction time, and CO₂ pressure on the yield as well as the molecular weight of polycarbonate was systematically investigated. The high selectivity of polycarbonate over cyclic carbonate at 40 °C was maintained after a longer reaction time to attain quantitative formation of the alternating copolymer. High molecular weight of 67 000 were achieved at an appropriate combination of all variables.
Related Links	http://www.degruyter.com/dg/viewarticle.fullcontentlink:pdfeventlink/$002fj$002fepoly.2011.11.issue-1$002fepoly.2011.11.1.55$002fepoly.2011.11.1.55.pdf?t:ac=j$002fepoly.2011.11.issue-1$002fepoly.2011.11.1.55$002fepoly.2011.11.1.55.xml
Ending Page	62
Page Count	8
Starting Page	55
ISSN	21974586
e-ISSN	16187229
DOI	10.1515/epoly.2011.11.1.55
Journal	e-Polymers
Issue Number	1
Volume Number	11
Language	English
Publisher	Walter de Gruyter GmbH
Publisher Date	2011-12-01
Access Restriction	Open
Subject Keyword	E-polymers Polymer Science Carbon Dioxide Copolymerization Polycarbonate Supported Journal: e-Polymers, Issue- 3
Content Type	Text
Resource Type	Article

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