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Novel cyclohexyl-substituted salicylaldiminato–nickel(II) complex as a catalyst for ethylene homopolymerization and copolymerization by Junquan Sun; Yuhua Shan; Yongjin Xu; Yonggang Cui; H. Schumann; M. Hummert is a Materials Science article available to read on EtoBox.

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## Abstract The cyclohexyl‐substituted salicylaldiminato–Ni(II) complex [O(3‐C~6~H~11~)(5‐CH~3~)C~6~H~2~CHN‐2,6‐C~6~H~3~^__i__^Pr~2~]Ni(PPh~3~)(Ph) (4) has been synthesized and characterized with ^1^H NMR and X‐ray structure analysis. In the presence of phosphine scavengers such as bis(1,5‐cyclooctadiene)nickel(0) [Ni(COD)~2~], triisobutylaluminum (TIBA), and triethylaluminum (TEA), 4 is an active catalyst for ethylene polymerization and copolymerization with the polar monomers __tert__‐butyl‐10‐undecenoate, methyl‐10‐undecenoate, and 4‐penten‐1‐ol under mild conditions. The polymerization parameters affecting the catalytic activity and viscosity‐average molecular weight of polyethylene, such as the temperature, time, ethylene pressure, and catalyst concentration, are discussed. A polymerization activity of 3.62 × 10^5^ g of PE (mol of Ni h)^−1^ and a weight‐average molecular weight of polyethylene of 5.73 × 10^4^ g^.^mol^−1^ have been found for 10 μmol of 4 and a Ni(COD)~2~/4 ratio of 3 in a 30‐mL toluene solution at 45 °C and 12 × 10^5^ Pa of ethylene for 20 min. The polydispersity index of the resulting polyethylene is about 2.04. After the addition of tetrahydrofuran and Et~2

Who reads Novel cyclohexyl-substituted salicylaldiminato–nickel(II) complex as a catalyst for ethylene homopolymerization and copolymerization?

Author

Junquan Sun; Yuhua Shan; Yongjin Xu; Yonggang Cui; H. Schumann; M. Hummert

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2004

Language

EN

Field

Materials Science (Physical Sciences)