Copolymers of Ethylene and Vinyl Amino Acidic Ester with High Molecular Weight Prepared by Non-metallocene Catalysts

Wang, Jing; Feng, Nan; Guo, Jiangping; Wang, Jian; Shi, Xianghui; Huang, Haojun; Huang, Qigu; Yang, Wantai

doi:10.1007/s10562-015-1686-1

Cited by 6 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This shows that the ligands bearing different substituents have significant effect on the termination barrier. The electron-withdrawing F group increased the barrier, in accordance with expectation, in light of the large barrier of 27.12 kcal/mol encountered for 2c, β-HE may not occur very easily. ,, The increase in catalyst activity of introducing electron-withdrawing on ligands predicted by the DFT calculations agreed well with the experimental results. The termination barrier via the β-HE mechanism (1-octene/9-decen-1-ol) showed the same regularity: the introduction of electron-withdrawing F group increased the barrier.…”

Section: Resultssupporting

confidence: 86%

“…A series of [N, P] Ti nonmetallocene complexes with different substituents on the aromatic ring were synthesized [2a–2e, mesityl, phenyl, 2,6-difluorophenyl (or 2,6-F2-Ph), 2,4,6-trifluorophenyl (or 2,4,6-F3-Ph), and 2,3,4,5,6-pentafluorophenyl (or 2,3,4,5,6-F5-Ph)-diphenyl phosphine trichlorotitanium, Scheme ] and applied for olefin copolymerization under atmospheric pressure. , The representative polymerization results are summarized in Tables – .…”

Section: Resultsmentioning

confidence: 99%

“…The characterization and yields in % and in grams of the ligands and Ti complexes were supported in the Supporting Information. The synthesis and the structure characterization of the compounds and Ti complexes are according to the patent and the lectures. − …”

Section: Methodsmentioning

confidence: 99%

“…The synthesis and the structure characterization of the compounds and Ti complexes are according to the patent 16 and the lectures. 17 − 19 …”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Ethylene/Polar Monomer Copolymerization by [N, P] Ti Complexes: Polar Copolymers with Ultrahigh-Molecular Weight

Liu,

Zhang,

Sun

et al. 2024

ACS Omega

Self Cite

View full text Add to dashboard Cite

A series of novel titanium complexes (2a−2e) bearing [N, P] aniline−chlorodiphenylphosphine ligands (1a−1e) featuring CH 3 and F substituents have been synthesized and characterized. Surprisingly, in the presence of polar additive, the complexes (2a−2e) all displayed high catalytic activities (up to 1.04 × 10 6 gPolymer (mol•Ti) −1 •h −1 and produced copolymer with the ultrahigh molecular weight up to 1.37 × 10 6 g/mol. The catalytic activities are significantly enhanced by introducing electron-withdrawing group (F) into the aniline aromatic ring. Especially, the increase in activity based on different complexes followed the order of 2e > 2d > 2c > 2b > 2a. Simultaneously, density functional theory (DFT) calculations have been performed to probe the polymerization mechanism as well as the electronic and steric effects of various substituents on the catalyst backbone. DFT computation revealed that the polymerization behaviors could be adjusted by the electronic effect of ligand substituents; however, it has little to do with the steric hindrance of the substituents. Furthermore, theoretical calculation results keep well in accordance with experimental measurement results. The article provided an appealing design method that the employment of fluorine atom as electron-withdrawing to be studied is the promotive effect of transition-metal coordination polymerization.

show abstract

Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The synthesis and the structure characterization of the compounds and Ti complexes are according to the patent 16 and the lectures. 17 − 19 …”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Ethylene/Polar Monomer Copolymerization by [N, P] Ti Complexes: Polar Copolymers with Ultrahigh-Molecular Weight

Liu,

Zhang,

Sun

et al. 2024

ACS Omega

Self Cite

View full text Add to dashboard Cite

show abstract

“…Herein, we hope to synthesize polymers with pendent bioactive molecules through coordination polymerization. A series of non-metallocene catalysts were synthesized and discussed in terms of their catalytic behavior for the copolymerization of ethylene and N -acetyl- O -(ω-alkenyl)- l -tyrosine ethyl ester in detail in our previous study [ 26 , 27 ]. Titanium complex exhibited higher catalytic activity for the copolymerization of ethylene and N -acetyl- O -(ω-alkenyl)- l -tyrosine ethyl ester.…”

Section: Introductionmentioning

confidence: 99%

Highly Active Copolymerization of Ethylene and N-Acetyl-O-(ω-Alkenyl)-l-Tyrosine Ethyl Esters Catalyzed by Titanium Complex

Wang

Zhang

et al. 2016

Polymers

Self Cite

View full text Add to dashboard Cite

A series of N-acetyl-O-(ω-alkenyl)-L-tyrosine ethyl esters were synthesized by the reaction of vinyl bromides (4-bromo-1-butene, 6-bromo-1-hexene, 8-bromo-1-octene and 10-bromo-1-decene) with N-acetyl-L-tyrosine ethyl ester. 1 H NMR, elemental analysis, FT-IR, and mass spectra were performed for these N-acetyl-O-(ω-alkenyl)-L-tyrosine ethyl esters. The novel titanium complex can catalyze the copolymerization of ethylene and N-acetyl-O-(ω-alkenyl)-L-tyrosine ethyl esters efficiently and the highest catalytic activity was up to 6.86ˆ10 4 gP¨(molTi)´1¨h´1. The structures and properties of the obtained copolymers were characterized by FT-IR, ( 1 H) 13 C NMR, GPC, DSC, and water contact angle. The results indicated that the obtained copolymers had a uniformly high average molecular weight of 2.85ˆ10 5 g¨mol´1 and a high incorporation ratio of N-acetyl-O-(but-3-enyl)-L-tyrosine ethyl ester of 2.65 mol % within the copolymer chain. The units of the comonomer were isolated within the copolymer chains. The insertion of the polar comonomer into a copolymer chain can effectively improve the hydrophilicity of a copolymer.

show abstract

Binuclear Titanium Catalysts Based on Methylene-Bridged Tridentate Salicylaldiminato Ligands for Ethylene Homo- and Copolymerization

Lan

Xie

et al. 2017

Catal Lett

View full text Add to dashboard Cite

Copolymers of Ethylene and Vinyl Amino Acidic Ester with High Molecular Weight Prepared by Non-metallocene Catalysts

Cited by 6 publications

References 29 publications

Ethylene/Polar Monomer Copolymerization by [N, P] Ti Complexes: Polar Copolymers with Ultrahigh-Molecular Weight

Ethylene/Polar Monomer Copolymerization by [N, P] Ti Complexes: Polar Copolymers with Ultrahigh-Molecular Weight

Highly Active Copolymerization of Ethylene and N-Acetyl-O-(ω-Alkenyl)-l-Tyrosine Ethyl Esters Catalyzed by Titanium Complex

Binuclear Titanium Catalysts Based on Methylene-Bridged Tridentate Salicylaldiminato Ligands for Ethylene Homo- and Copolymerization

Contact Info

Product

Resources

About