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Highly stereospecific polymerization of isoprene with homogeneous binary Ziegler-Natta catalysts based on NCN-pincer neodymium precursor
Liu DongTao1,2,3; Cui DongMei1,2; Gao Wei4
2010-08-01
Source PublicationSCIENCE CHINA-CHEMISTRY
ISSN1674-7291
Volume53Issue:8Pages:1641-1645
AbstractThe aryldiimine NCN-pincer stabilized neodymium dichloride combined with aluminum alkyls established a new type of homogeneous binary neutral Ziegler-Natta catalyst system. This system exhibited high activity and high cis-1,4 selectivity for the polymerization of isoprene (T(p) = 20 degrees C, 98.2%; T(p) = -20 degrees C, > 99%). Such catalytic performances remained under a broad range of polymerization temperatures and monomer-to-neodymium ratios (from 500 to 8000), reaching high number-average molecular weight (M(n) = 1582 kg/mol) and relatively narrow molecular weight distribution (PDI = 1.68), which was, however, influenced by the amount and bulkiness of aluminum alkyls. Dynamic investigation of the polymerization was performed, which showed the number-average molecular weight of the resultant polyisoprene had an almost linear correlation with the conversion, suggesting, in some degree, the polymerization with this catalytic system was controllable.
KeywordNeodymium Ncn-pincer Complex Polyisoprene Cis-1 4 Selectivity
DOI10.1007/s11426-010-4041-9
Indexed BySCI
Language英语
WOS IDWOS:000281403400005
PublisherSCIENCE PRESS
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68734
Collection中国科学院化学研究所
Corresponding AuthorCui DongMei
Affiliation1.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
4.Jilin Univ, Sch Chem, Changchun 130012, Peoples R China
Recommended Citation
GB/T 7714
Liu DongTao,Cui DongMei,Gao Wei. Highly stereospecific polymerization of isoprene with homogeneous binary Ziegler-Natta catalysts based on NCN-pincer neodymium precursor[J]. SCIENCE CHINA-CHEMISTRY,2010,53(8):1641-1645.
APA Liu DongTao,Cui DongMei,&Gao Wei.(2010).Highly stereospecific polymerization of isoprene with homogeneous binary Ziegler-Natta catalysts based on NCN-pincer neodymium precursor.SCIENCE CHINA-CHEMISTRY,53(8),1641-1645.
MLA Liu DongTao,et al."Highly stereospecific polymerization of isoprene with homogeneous binary Ziegler-Natta catalysts based on NCN-pincer neodymium precursor".SCIENCE CHINA-CHEMISTRY 53.8(2010):1641-1645.
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