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ZhangM.the (final comments 2).pdf (1.29 MB)
ETD Abstract Container
Abstract Header
Nickel-Catalyzted Alternating Copolymerization of Carbon Monoxide and Ethylene
Author Info
Zhang, Mengru
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=akron1428024122
Abstract Details
Year and Degree
2015, Master of Science, University of Akron, Polymer Science.
Abstract
ABSTRACT Copolymerization of carbon monoxide and ethylene has been studied since 1940s, while the originally discovered catalyst was a nickel compound, cationic palladium (II) catalyst containing bidentate diphosphine and nitrogen ligands showed excellent activity at mild conditions. As a result, palladium catalysts became the mainstay of research in this area. In 1990s, Shell and BP started production of polyketone in full industrial using Pd-catalysts. The large scale production was then stopped at the beginning of this century for unannounced reasons, but the use of the expensive Pd as the catalyst is possibly a major problem for the commercial processes. Cationic nickel (II) complexes had much lower activity than the cationic Pd catalysts. The most efficient nickel (II) catalyst containing o-methoxyphenyl-modified P-P ligand showed moderate activity as 184 gPK/(gNi*h-1). In comparison, the commercial Pd catalysts have the activity of 6000 gPK/(gPd*h-1). Neutral nickel catalysts have been shown by other groups to have improved activities. In this work, we successfully designed and synthesized two zwitterionic nickel (II) catalysts. The highest activity can reach 8993 gPK/(gNi*h-1) and 15664 gPK/(gNi*h-1) respectively. Also, we isolated the real active intermediate, Ni-H, in the catalysis process.
Committee
Li Jia, Dr. (Advisor)
Coleen Pugh, Dr. (Committee Member)
Pages
48 p.
Subject Headings
Chemistry
;
Polymer Chemistry
;
Polymers
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Citations
Zhang, M. (2015).
Nickel-Catalyzted Alternating Copolymerization of Carbon Monoxide and Ethylene
[Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428024122
APA Style (7th edition)
Zhang, Mengru.
Nickel-Catalyzted Alternating Copolymerization of Carbon Monoxide and Ethylene.
2015. University of Akron, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=akron1428024122.
MLA Style (8th edition)
Zhang, Mengru. "Nickel-Catalyzted Alternating Copolymerization of Carbon Monoxide and Ethylene." Master's thesis, University of Akron, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1428024122
Chicago Manual of Style (17th edition)
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Document number:
akron1428024122
Download Count:
85
Copyright Info
© 2015, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.