Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene

Zhao, Weizhen; Nomura, Kotohiro

doi:10.3390/catal6110175

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Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene

by

Weizhen Zhao

and

Kotohiro Nomura

^*

Department of Chemistry, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan

^*

Author to whom correspondence should be addressed.

Catalysts 2016, 6(11), 175; https://doi.org/10.3390/catal6110175

Submission received: 15 October 2016 / Revised: 24 October 2016 / Accepted: 28 October 2016 / Published: 9 November 2016

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Abstract

Selected results for the synthesis of cyclic olefin copolymers (COCs)—especially copolymerizations of norbornene (NBE) or tetracyclododecene (TCD) with ethylene and α-olefins (1-hexene, 1-octene, 1-dodecene)—using group 4 transition metal (titanium and zirconium) complex catalysts have been reviewed. Half-titanocenes containing an anionic ancillary donor ligand, Cp’TiX₂(Y) (Cp’ = cyclopentadienyl; X = halogen, alkyl; Y = anionic donor ligand such as aryloxo, ketimide, imidazolin-2-iminato, etc.), are effective catalysts for efficient synthesis of new COCs; ligand modifications play an important role for the desired copolymerization. These new COCs possess promising properties (high transparency, thermal resistance (high glass transition temperature), low water absorption, etc.), thus it is demonstrated that the design of an efficient catalyst plays an essential role for the synthesis of new fine polyolefins with specified properties.

Keywords: polymerization; titanium; zirconium; cyclic olefin copolymers; catalyst design; half-titanocene; homogeneous catalysis

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MDPI and ACS Style

Zhao, W.; Nomura, K. Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene. Catalysts 2016, 6, 175. https://doi.org/10.3390/catal6110175

AMA Style

Zhao W, Nomura K. Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene. Catalysts. 2016; 6(11):175. https://doi.org/10.3390/catal6110175

Chicago/Turabian Style

Zhao, Weizhen, and Kotohiro Nomura. 2016. "Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene" Catalysts 6, no. 11: 175. https://doi.org/10.3390/catal6110175

APA Style

Zhao, W., & Nomura, K. (2016). Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene. Catalysts, 6(11), 175. https://doi.org/10.3390/catal6110175

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene

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