Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Chengang Cao"'
Publikováno v:
Catalysts, Vol 12, Iss 9, p 1008 (2022)
Nickel (II) complexes stabilized by PNP(NR2)2 (L1: R = Methyl, L2: R = ethyl, L3: R = isopropyl) ligands were synthesized and characterized. A narrow range of products was observed for catalytic systems containing nickel complexes and ethyl aluminum
Externí odkaz:
https://doaj.org/article/f9047742d11940dfa83df5061c714c66
Publikováno v:
Catalysts, Vol 12, Iss 9, p 944 (2022)
The in situ formation and activation of Cr(III) catalysts based on unsymmetrical PNP ligands yield efficient catalytic systems for selective ethylene tri-/tetramerization. The electronic nature (electron-withdrawing or electron-donating) and position
Externí odkaz:
https://doaj.org/article/5ed8a058a90240ebb0e49ba0d8c9dd79
Publikováno v:
ChemCatChem. 9:76-79
A series of silicon-bridged diphosphine (SBDP) ligands have been synthesized and characterized. The Cr pre-catalyst supported by bis(diphenylphosphinomethyl)-dimethylsilane (Ligand 3) achieved a high activity of 4.2×10⁶ g/(mol Cr∙h) and a high s
Publikováno v:
Applied Petrochemical Research. 6:413-417
The effect of hydrogen addition on the catalytic activity and product selectivity of PNP/Cr(III)/MAO catalytic systems for ethylene tetramerization was investigated. The results showed that the catalytic activity could be increased twice and the poly
Publikováno v:
Catalysis Today. 148:389-397
Copolymerizations of cyclohexene oxide (CHO) with carbon dioxide have been carried out by using a series of double metal cyanide (DMC) catalysts of the general formula, Zn 3 [Co(CN) 6 ] 2 · x ZnX 2 · y H 2 O· z [complexing agent (CA)], prepared by
Publikováno v:
Macromolecular Rapid Communications. 26:1936-1941
Propylene was copolymerized with 1,4-divinylbenzene (1,4-DVB) using rac-Me2Si(2-Me-4-Ph-Ind) 2 ZrCl 2 and MAO in the presence of hydrogen. 1 H NMR spectra of the obtained copolymer confirmed the successful incorporation of 1,4-DVB. 13 C NMR analysis
Publikováno v:
Macromolecular Rapid Communications. 25:1797-1804
Summary: Copolymerization of propylene and 1,4-divinylbenzene was successfully performed by a MgCl2-supported TiCl4 catalyst, yielding isotactic poly(propylene) (i-PP) polymers containing a few pendant styrene groups. With a metalation reaction with
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 43:429-437
This article discusses a facile and inexpensive reaction process for preparing polypropylene-based graft copolymers containing an isotactic polypropylene (i-PP) main chain and several functional polymer side chains. The chemistry involves an i-PP pol
Hydrogen: efficient promoter for PNP/Cr(III)/MAO catalyzed ethylene tetramerization toward 1-octene.
Publikováno v:
Applied Petrochemical Research; Dec2016, Vol. 6 Issue 4, p413-417, 5p
Autor:
Chengang Cao
Publikováno v:
Chinese Science Bulletin. 50:1048
In summary, we have demonstrated a convenient yet highly efficient method for the preparation of PE-based graft copolymers via ATRP. By introducing a small amount of styrene groups into PE chains via the selective copolymerization of ethylene with 1,