Results 51 to 60 of about 20,042 (215)
IN SITU SILICA SUPPORTED METALLOCENE CATALYSTS FOR ETHYLENE POLYMERIZATION [PDF]
Journal of Petroleum Science and Technology, 2014 Bis(2-R-ind)ZrCl2 (R: H or phenyl) was supported on different types of silica by in situ impregnation method and used for ethylene polymerization.
saeid ahmadjo +6 more
doaj +1 more source
Group 14 Metallocene Catalysts for Carbonyl Hydroboration and Cyanosilylation [PDF]
, 2023 A series of six Group 14 metallocene compounds (M = Ge, Sn, Pb) were studied as catalysts for carbonyl hydroboration and cyanosilylation reactions at room temperature.
Mallory, Fujiwara +2 more
core +2 more sources
Fine Tuning of Catalyst Active Sites to Access Advanced Ultrahigh‐Melting Polyolefins
Angewandte Chemie, EarlyView.A redesign of the active site of the pyridylamido hafnium (Hf) catalysts can enhance the performance of this catalyst family and unlock previously inaccessible polymer structures. When the catalyst is precontacted with allyltrimethylsilane the active species is modified and the catalyst experiences a new life becoming able to polymerize sterically ...
Fabio De Stefano +3 more
wiley +2 more sources
Photooxidation of Some Metallocenes in a Polymer Matrix
Molecules, 2005 The changes in the electronic absorption spectra (UV-Vis) of some metallocene-doped poly(methyl methacrylate) (PMMA) thin films containing chloroform molecules as impurities were studied after photoexcitation in the nitrogen atmosphere.
B. Mallik
doaj +1 more source
, 2016 Dynamic Resolution of a Metallocene: Diastereoselective Assembly of an Early-Late Heterobimetallic Metal-Bridged ansa-Metallocene Opening a Route to Parallel Catalyst ...
T. Keith Hollis (1544095) +2 more
core +2 more sources
Synthesis of (Ind)2ZrCl2 Catalyst for Copolymerization of Ethylene and Propylene: Parameters Effect on Productivity [PDF]
علوم و تکنولوژی پلیمر, 2010 Bis(indenyl)zirconium dichloride as a catalyst was synthesized using a modified method at the room temperature. Polymerization of ethylene and copolymerization of ethylene and propylene were carried out by this metallocene catalyst. Ethylene propylene (P/
S. Ahmadjo +4 more
doaj +1 more source
Isolation of a Perfectly Linear Uranium(II) Metallocene.
Angewandte Chemie, 2019 Reduction of the uranium(III) metallocene [(η 5 -C 5 i Pr 5 ) 2 UI] ( 1 ) with potassium graphite produces the 'second-generation' uranocene [(η 5 -C 5 i Pr 5 ) 2 U] ( 2 ), which contains uranium in the formal divalent oxidation state.
R. Layfield +5 more
semanticscholar +1 more source
Journal of the American Chemical Society, 2018 Substrate selectivity in reductive multi-electron/proton catalysis with small molecules such as N2, CO2, and O2 is a major challenge for catalyst design, especially where the competing hydrogen evolution reaction (HER) is thermodynamically and ...
Matthew J. Chalkley +3 more
semanticscholar +1 more source
Metallocene Polyethylene Wax Synthesis
, 2020 Solid polymethylaluminoxane (sMAO) supported ansa-bridged permethylindenyl zirconocenes Me2SB(CpR,I*)ZrX2 ({(η5-C9Me6)Me2Si(η5-C5H3R)}ZrX2; R = H, Me, and nBu; X = Cl, Br, Me, and CH2Ph) have been ...
Jessica V. Lamb +4 more
semanticscholar +1 more source
, 2016 Metallocene-Catalyzed Propene Polymerization: From Microstructure to Kinetics.
Michele Vacatello (2533219) +4 more
core +1 more source