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Ethylene polymerization, and the copolymerizations of ethylene with hexene or norbornene with highly active mono(beta-enaminoketonato) vanadium(III) catalysts
Tang, Li-Ming; Wu, Ji-Qian; Duan, Yi-Qun; Pan, Li; Li, Yan-Guo; Li, Yue-Sheng
2008-03-15
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume46Issue:6Pages:2038-2048
AbstractFive novel vanadium(III) complexes [PhN = C(R-2)CHC(R-1)O]VCl2(THF)(2) (4a: R-1 = Ph, R-2 = CF3; 4b: R-1 =t-Bu, R-2 = CF3; 4c: R-1 = CF3, R-2 = CH3; 4d: R-1 = Ph, R-2 = CH3; 4e: R-1 = Ph, R-2 = H) have been synthesized and characterized. On activation with Et2AlCl, all the complexes, in the presence of ethyl trichloroacetate (ETA) as a promoter, are highly active precatalysts for ethylene polymerization, and produce high molecular weight and linear polymers. Catalyst activities more than 16.8 kg PE/mmolv h bar and weight-average molecular weights higher than 173 kg/ mol were observed under mild conditions. The copolymerizations of ethylene and norbornene or 1-hexene with the precatalysts were also explored, which leads to high molecular weight copolymers with high comonomer incorporation. Catalyst activity, comonomer incorporation, and polymer molecular weight as well as polydispersity index can be controlled over a wide range by the variation of precatalyst structure and the reaction parameters such as Al/V molar ratio, comonomer feed concentration, and polymerization temperature. (C) 2008 Wiley Periodicals, Inc.
KeywordCatalysis Copolymerization Polyolefins Ziegler-natta Polymerization
DOI10.1002/pola.22538
Indexed BySCI
Language英语
WOS IDWOS:000254135200012
PublisherJOHN WILEY & SONS INC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65250
Collection中国科学院化学研究所
Corresponding AuthorLi, Yue-Sheng
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Tang, Li-Ming,Wu, Ji-Qian,Duan, Yi-Qun,et al. Ethylene polymerization, and the copolymerizations of ethylene with hexene or norbornene with highly active mono(beta-enaminoketonato) vanadium(III) catalysts[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2008,46(6):2038-2048.
APA Tang, Li-Ming,Wu, Ji-Qian,Duan, Yi-Qun,Pan, Li,Li, Yan-Guo,&Li, Yue-Sheng.(2008).Ethylene polymerization, and the copolymerizations of ethylene with hexene or norbornene with highly active mono(beta-enaminoketonato) vanadium(III) catalysts.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,46(6),2038-2048.
MLA Tang, Li-Ming,et al."Ethylene polymerization, and the copolymerizations of ethylene with hexene or norbornene with highly active mono(beta-enaminoketonato) vanadium(III) catalysts".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 46.6(2008):2038-2048.
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