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Synthesis of cationic nickel(II) compounds for butadiene polymerization
Author(s) -
Liu Li,
Zhang Xu,
Liu Heng,
Zhang Xuequan,
Sun Guangping,
Zhang Hexin
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40511
Subject(s) - cationic polymerization , nickel , polymerization , polybutadiene , polymer chemistry , benzimidazole , steric effects , chemistry , terpyridine , catalysis , alkoxy group , infrared spectroscopy , materials science , organic chemistry , copolymer , metal , polymer , alkyl
ABSTRACT A series of cationic nickel(II) compounds with various counter ions ([BF 4 ] – , [CF 3 SO 3 ] – ) and N‐bearing ligands (1,10‐phenanthroline, benzimidazole and terpyridine) were synthesized. The simple compound, Ni(Phen) 2 Cl 2 , was prepared as a reference compound. All title compounds were characterized by elemental analysis, and infrared spectra analyses and compounds, some specific ones, were further examined by X‐ray crystallographic analysis. Upon treatment with ethylaluminum sesquichloride, these nickel(II) compounds exhibited high activities (up to 88.5%/4 h) for butadiene polymerization and afforded liquid polybutadiene ( M w < 30,000) with a high cis ‐content (up to 92.1%). Various polymerization conditions were investigated in detail, and it was found that less steric hindrance of the ligands enhanced the catalytic activities of the nickel(II) compounds. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40511.