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Catalysts 2015, 5(4), 1831-1845; doi:10.3390/catal5041831

Copolymerization of Ethylene and Vinyl Amino Acidic Ester Catalyzed by Titanium and Zirconium Complexes

1
State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2
Lab for Synthetic Resin Research Institution of Petrochemical Technology, China National Petroleum Corporation, Beijing 100083, China
3
Liaoyang Petrochemical Corporation, China National Petroleum Corporation, Liaoyang 111003, China
*
Author to whom correspondence should be addressed.
Academic Editor: Carl Redshaw
Received: 7 September 2015 / Revised: 14 October 2015 / Accepted: 16 October 2015 / Published: 30 October 2015
(This article belongs to the Special Issue Molecular Catalysis for Precise Olefin Polymerization and ROP 2015)
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Abstract

A series of titanium and zirconium complexes with ligands based on di-isopropyl phosphorus-phenylamine and their derivatives were synthesized and characterized. These catalysts were utilized to catalyze the copolymerization of ethylene with N-acetyl-O-(dec-9-enyl)-L-tyrosine ethyl ester with high catalytic activity of 6.63 × 104 g P (mol Ti)−1 h−1 after activation by methylaluminoxane (MAO). The effects of ligand structure, metal atoms (Ti, Zr) and polymerization conditions were investigated in detail. The obtained polymers were characterized by 13C-NMR, DSC, FT-IR, and GPC. The results showed that the obtained copolymer had a high comonomer incorporation rate of 2.56 mol % within the copolymer chain. The melting temperature of the copolymer was up to 138.9 °C, higher than that of the obtained homopolyethylene. View Full-Text
Keywords: early transition metal complexes; N-acetyl-O-(dec-9-enyl)-L-tyrosine ethyl ester; copolymer early transition metal complexes; N-acetyl-O-(dec-9-enyl)-L-tyrosine ethyl ester; copolymer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, J.; Shi, X.; Chen, Y.; Li, H.; Zhang, R.; Yi, J.; Wang, J.; Huang, Q.; Yang, W. Copolymerization of Ethylene and Vinyl Amino Acidic Ester Catalyzed by Titanium and Zirconium Complexes. Catalysts 2015, 5, 1831-1845.

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