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Cycloheptyl-fused N, N, N '-chromium catalysts with selectivity for vinyl-terminated polyethylene waxes: thermal optimization and polymer functionalization
Huang, CB; Huang, YF; Ma, YP; Solan, GA; Sun, Y; Hu, XQ; Sun, WH
2018-10-14
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume47Issue:38Pages:13487-13497
AbstractFive chromium(iii) chloride complexes, [2-{(Ar)N=CMe}-9-{N(Ar)}C10H10N]CrCl3 (Ar = 2,6-Me(2)C(6)H(3)Cr1, 2,6-Et(2)C(6)H(3)Cr2, 2,6-i-Pr(2)C(6)H(3)Cr3, 2,4,6-Me(3)C(6)H(2)Cr4, 2,6-Et-2-4-MeC(6)H(2)Cr5), each chelated by a sterically and electronically different cycloheptyl-fused N,N,N'-bis(imino)pyridine, have been synthesized by the reactions of CrCl3(THF)(3) with the corresponding ligand (L1/L1'-L5/L5'). The molecular structure of Cr2 highlights both the steric properties exerted by the inequivalent N-2,6-ethylphenyl groups and the puckering of the fused cycloheptyl ring; a distorted octahedral geometry is conferred about the metal center. On activation with methylaluminoxane (MAO) or modified MAO (MMAO), Cr1-Cr5 displayed their optimal activity for ethylene polymerization at temperatures between 70 and 80 degrees C with the least sterically demanding Cr1 proving the most productive (1.44 x 10(7) g (PE) per mol (Cr) per h). The polyethylenes formed are of low molecular weight (M-w range: 0.66-3.56 kg mol(-1)) with narrow molecular weight distributions and display high levels of end-group unsaturation. Furthermore, the amenability of these vinyl-terminated polyethylenes to undergo functionalization via epoxidation has been demonstrated.
MOST Discipline CatalogueChemistry
DOI10.1039/c8dt03052a
Indexed BySCI
Language英语
WOS SubjectChemistry ; Inorganic & Nuclear
WOS IDWOS:000446199500026
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/41961
Collection工程塑料实验室
Affiliation1.Solan, GA
2.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China.
3.Solan, GA
4.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.
5.Sun, WH (reprint author), Univ Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing 100049, Peoples R China.
6.Hu, XQ (reprint author), Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China.
7.Solan, GA (reprint author), Univ Leicester, Dept Chem, Univ Rd, Leicester LE1 7RH, Leics, England.
Recommended Citation
GB/T 7714
Huang, CB,Huang, YF,Ma, YP,et al. Cycloheptyl-fused N, N, N '-chromium catalysts with selectivity for vinyl-terminated polyethylene waxes: thermal optimization and polymer functionalization[J]. DALTON TRANSACTIONS,2018,47(38):13487-13497.
APA Huang, CB.,Huang, YF.,Ma, YP.,Solan, GA.,Sun, Y.,...&Sun, WH.(2018).Cycloheptyl-fused N, N, N '-chromium catalysts with selectivity for vinyl-terminated polyethylene waxes: thermal optimization and polymer functionalization.DALTON TRANSACTIONS,47(38),13487-13497.
MLA Huang, CB,et al."Cycloheptyl-fused N, N, N '-chromium catalysts with selectivity for vinyl-terminated polyethylene waxes: thermal optimization and polymer functionalization".DALTON TRANSACTIONS 47.38(2018):13487-13497.
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