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Synthesis of Polyketones from Zwitterionic Nickel Compound Catalyzed Copolymerization of Carbon Monoxide And Olefins

Li, Maohua
http://rave.ohiolink.edu/etdc/view?acc_num=akron1461772542

Abstract Details

2016, Master of Science, University of Akron, Polymer Science.
Transition metal catalyzed alternating copolymerization of CO and olefins is an effective method for synthesis of aliphatic polyketons. Palladium and nickel catalysts are commonly employed to catalyze the polymerization with palladium catalysts being much more active and productive than nickel catalysts. Mechanistic studies of the nickel catalysts suggest that the resting states of cationic nickel catalysts likely involve intramolecular coordination of the ketone group of the propagating polyketone to nickel. To overcome this problem, our group recently developed a class of zwitterionic nickel catalysts, which have shown extremely high activity at the beginning of the polymerization but deactivate quickly. The overall productivity of our best zwitterionic catalyst is the highest among all nickel catalysts reported in the literature but still 2 orders of magnitudes lower than that of the palladium catalyst. In my thesis, I will show the low productivity leaves of nickel catalyst in the product. The residual nickel causes a decomposition process too close to the melting temperature of the polyketone. In order to improve the processability of the polyketone, I studied the terpolymerization of CO, ethylene, and 1-hexene and accidently discovered that catalyst productivity improves in the presence of 1-hexene.
Li Jia (Advisor)
Polymers
Ni Catalyst; Polyketone; CO and Ethylene

Recommended Citations

Citations

  • Li, M. (2016). Synthesis of Polyketones from Zwitterionic Nickel Compound Catalyzed Copolymerization of Carbon Monoxide And Olefins [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1461772542

    APA Style (7th edition)

  • Li, Maohua. Synthesis of Polyketones from Zwitterionic Nickel Compound Catalyzed Copolymerization of Carbon Monoxide And Olefins. 2016. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1461772542.

    MLA Style (8th edition)

  • Li, Maohua. "Synthesis of Polyketones from Zwitterionic Nickel Compound Catalyzed Copolymerization of Carbon Monoxide And Olefins." Master's thesis, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1461772542

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Akron and OhioLINK.