Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

Shu Zhang; Wen Chao Zhang; Dan Dan Shang; Zhi Qian Zhang; Yi Xian Wu

doi:10.1039/c5dt00675a

Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

Shu Zhang^*, Wen Chao Zhang, Dan Dan Shang, Zhi Qian Zhang, Yi Xian Wu

^*Corresponding author for this work

Beijing University of Chemical Technology

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

Various vanadium complexes containing N-heterocyclic carbenes, VOCl₃[1,3-R₂(NCH=)₂C:] (V1, R = 2,6-Me₂C₆H₃; V2, R = 2,6-Et₂C₆H₃; V3, R = 2,6-ⁱPr₂C₆H₃; V4, R = 2,4,6-Me₃C₆H₂), have been synthesized and employed as catalyst precursors for ethylene/propylene copolymerization after activation by Et₃Al₂Cl₃. Complex V4 showed higher catalytic activity of ca. 38 kg copolymer per (mol of V) per h and an ethylene/propylene copolymer with random monomer distribution could be prepared. Complex V3 consumed more cocatalyst than its analogues to reach higher catalytic activity. The obtained copolymers exhibit relatively narrow polydispersity and contain more randomly distributed monomer units than that the copolymers prepared by using the traditional vanadium catalytic system.

Original language	English
Pages (from-to)	15264-15270
Number of pages	7
Journal	Dalton Transactions
Volume	44
Issue number	34
DOIs	https://doi.org/10.1039/c5dt00675a
Publication status	Published - 25 Apr 2015
Externally published	Yes

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@article{b3adb1175bf14556b0668aaca1f50fb6,

title = "Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes",

abstract = "Various vanadium complexes containing N-heterocyclic carbenes, VOCl3[1,3-R2(NCH=)2C:] (V1, R = 2,6-Me2C6H3; V2, R = 2,6-Et2C6H3; V3, R = 2,6-iPr2C6H3; V4, R = 2,4,6-Me3C6H2), have been synthesized and employed as catalyst precursors for ethylene/propylene copolymerization after activation by Et3Al2Cl3. Complex V4 showed higher catalytic activity of ca. 38 kg copolymer per (mol of V) per h and an ethylene/propylene copolymer with random monomer distribution could be prepared. Complex V3 consumed more cocatalyst than its analogues to reach higher catalytic activity. The obtained copolymers exhibit relatively narrow polydispersity and contain more randomly distributed monomer units than that the copolymers prepared by using the traditional vanadium catalytic system.",

author = "Shu Zhang and Zhang, {Wen Chao} and Shang, {Dan Dan} and Zhang, {Zhi Qian} and Wu, {Yi Xian}",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2015.",

year = "2015",

month = apr,

day = "25",

doi = "10.1039/c5dt00675a",

language = "English",

volume = "44",

pages = "15264--15270",

journal = "Dalton Transactions",

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publisher = "Royal Society of Chemistry",

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T1 - Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

AU - Zhang, Shu

AU - Zhang, Wen Chao

AU - Shang, Dan Dan

AU - Zhang, Zhi Qian

AU - Wu, Yi Xian

PY - 2015/4/25

Y1 - 2015/4/25

N2 - Various vanadium complexes containing N-heterocyclic carbenes, VOCl3[1,3-R2(NCH=)2C:] (V1, R = 2,6-Me2C6H3; V2, R = 2,6-Et2C6H3; V3, R = 2,6-iPr2C6H3; V4, R = 2,4,6-Me3C6H2), have been synthesized and employed as catalyst precursors for ethylene/propylene copolymerization after activation by Et3Al2Cl3. Complex V4 showed higher catalytic activity of ca. 38 kg copolymer per (mol of V) per h and an ethylene/propylene copolymer with random monomer distribution could be prepared. Complex V3 consumed more cocatalyst than its analogues to reach higher catalytic activity. The obtained copolymers exhibit relatively narrow polydispersity and contain more randomly distributed monomer units than that the copolymers prepared by using the traditional vanadium catalytic system.

AB - Various vanadium complexes containing N-heterocyclic carbenes, VOCl3[1,3-R2(NCH=)2C:] (V1, R = 2,6-Me2C6H3; V2, R = 2,6-Et2C6H3; V3, R = 2,6-iPr2C6H3; V4, R = 2,4,6-Me3C6H2), have been synthesized and employed as catalyst precursors for ethylene/propylene copolymerization after activation by Et3Al2Cl3. Complex V4 showed higher catalytic activity of ca. 38 kg copolymer per (mol of V) per h and an ethylene/propylene copolymer with random monomer distribution could be prepared. Complex V3 consumed more cocatalyst than its analogues to reach higher catalytic activity. The obtained copolymers exhibit relatively narrow polydispersity and contain more randomly distributed monomer units than that the copolymers prepared by using the traditional vanadium catalytic system.

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U2 - 10.1039/c5dt00675a

DO - 10.1039/c5dt00675a

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SN - 1477-9226

VL - 44

SP - 15264

EP - 15270

JO - Dalton Transactions

JF - Dalton Transactions

IS - 34

ER -

Ethylene/propylene copolymerization catalyzed by vanadium complexes containing N-heterocyclic carbenes

Abstract

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