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Ethylene Polymerization and Ethylene/Hexene Copolymerization with Vanadium(III) Catalysts Bearing Heteroatom-Containing Salicylaldiminato Ligands
Wu, Ji-Qian1,2; Pan, Li1; Liu, San-Rong1; He, Li-Peng1,2; Li, Yue-Sheng1
2009-07-15
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume47Issue:14Pages:3573-3582
AbstractA series of novel vanadium(III) complexes hearing heteroatoill-containing group-substituted salicylaldiminato ligands [RN=CH(ArO)]VCl(2)(THF)(2) (Ar = C(6)H(4), R = C(3)H(2)NS, 2a; C(7)H(4)NS, 2c; C(7)H(5)N(2), 2d; Ar = C(6)H(2)tBu(2) (2,4), R = C(3)H(2)NS, 2b) have been synthesized and characterized. Structure of complex 2c was further confirmed by X-ray crystallographic analysis. The complexes were investigated as the catalysts for ethylene polymerization in the presence of Et(2)AlCl. Complexes 2a-d exhibited high catalytic activities (up to 22.8 kg polyethylene/mmolv h bar), and affording polymer with unimodal molecular weight distributions at 25-70 degrees C in the first 5-min polymerization, whereas produced bimodal molecular weight distribution polymers at 70 degrees C when polymerization time prolonged to 30 min. The catalyst structure plays an important role in controlling the molecular weight and molecular weight distribution of the resultant polymers produced in 30 min polymerization. In addition, ethylene/hexene copolymerizations with catalysts 2a-d were also explored in the presence of Et(2)AlCl, which leads to the high molecular weight and unimodal distributions copolymers with high comonomer incorporation. Catalytic activity, comonomer incorporation, and polymer molecular weight can be controlled over a wide range by the variation of catalyst structure and the reaction parameters, such as comonomer feed concentration, polymerization time, and polymerization reaction temperature. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 3573-3582, 2009
KeywordCatalysts Copolymerization Ziegler-natta Polymerization
DOI10.1002/pola.23441
Indexed BySCI
Language英语
WOS IDWOS:000267444200009
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66892
Collection中国科学院化学研究所
Corresponding AuthorLi, Yue-Sheng
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Wu, Ji-Qian,Pan, Li,Liu, San-Rong,et al. Ethylene Polymerization and Ethylene/Hexene Copolymerization with Vanadium(III) Catalysts Bearing Heteroatom-Containing Salicylaldiminato Ligands[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2009,47(14):3573-3582.
APA Wu, Ji-Qian,Pan, Li,Liu, San-Rong,He, Li-Peng,&Li, Yue-Sheng.(2009).Ethylene Polymerization and Ethylene/Hexene Copolymerization with Vanadium(III) Catalysts Bearing Heteroatom-Containing Salicylaldiminato Ligands.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,47(14),3573-3582.
MLA Wu, Ji-Qian,et al."Ethylene Polymerization and Ethylene/Hexene Copolymerization with Vanadium(III) Catalysts Bearing Heteroatom-Containing Salicylaldiminato Ligands".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 47.14(2009):3573-3582.
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