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Nickel-Catalyzted Alternating Copolymerization of Carbon Monoxide and Ethylene

Zhang, Mengru

Abstract Details

2015, Master of Science, University of Akron, Polymer Science.
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.
Li Jia, Dr. (Advisor)
Coleen Pugh, Dr. (Committee Member)
48 p.

Recommended Citations

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)