Results 101 to 110 of about 2,112 (213)

Styrene Polymerization with Group III Metallocenes: A Generative and Interpretable Catalyst Design Strategy Combining Density Functional Theory and Machine Learning

ChemistryEurope
The rational design of group III metallocene catalysts for styrene polymerization remains a complex challenge due to intertwined steric and electronic effects that govern monomer coordination and insertion. A generative and interpretable machine learning
Stella Christodoulou, Etienne Dos Santos, Romuald Poteau, Laurent Maron   +3 more
doaj   +1 more source

Sixtieth Anniversary of Ziegler-Natta Catalysts and Stereospecific Polymerization [PDF]

Kemija u Industriji, 2015
This review article highlights the history of the discoveries of organometallic catalysts and stereospecific polymerization of α-olefins, dienes and a number of vinyl monomers by Karl Ziegler and Giulio Natta sixty years ago, their developments and ...
Janović Z. , Veksli Z.
doaj  

Mesoporous Ga-MCM-41: a very efficient support for the heterogenisation of metallocene catalysts

, 2013
Mesoporous Ga-containing silicates prepared by direct synthesis, Ga-MCM-41, are used in combination with metallocene Cp2ZrCl2 to provide very effective supported catalysts for ethylene polymerisation.
Ribeiro, M. R., Campos, João M., Lourenço, J. P., Fernandes, A.   +3 more
core  

Key intermediates in metallocene-and post-metallocene-catalyzed polymerization

, 2007
The structures of intermediates formed upon the activation by methylaluminoxane (MAO) of a wide range of metallocene and post-metallocene catalysts of olefin polymerization were studied by C-13, H-1, and F-19 NMR. For all metallocenes considered (L2ZrCl2
Semikolenova, N. V., Bochmann, M., Zakharov, V. A., Talsi, E. P., Bryliakov, K. P.   +4 more
core   +1 more source

Isotactic-b-Syndiotactic Stereoblock Poly(methyl methacrylate) by Chiral Metallocene/Lewis Acid Hybrid Catalysts

, 2016
Stereoblock polymerization with chiral ansa-metallocene/strong Lewis acid hybrid catalysts capable of switching stereospecificity of the methyl methacrylate polymerization produces the highly stereoregular isotactic-b-syndiotactic stereoblock poly(methyl
Eugene Y.-X. Chen (1270119), Andrew D. Bolig (2465893)   +1 more
core   +1 more source

Heterogeneous metallocene catalysts

Heterogeneous metallocene catalysts
identifier:oai:t2r2.star.titech.ac.jp ...
openaire  

Polymer-supported metallocene catalysts for ethylene polymerisation: Characterisation and catalytic studies

, 2007
A series of polymer-supported unbridged metallocene dichloride catalysts, Cp″CpMCl2 (where Cp″ = C5Me4H and M = Ti or Zr) have been prepared. These catalysts have been characterised in detail and have shown promising activity in ethylene polymerisation ...
Jenny, C., de Miguel, Y. R., Pochan, D., Shearer, A. S., Minich, E. A.   +4 more
core   +1 more source

Polymerization of 3-methyl-1-butene promoted by metallocene catalysts

, 1996
3-Methyl-1-butene was polymd. in the presence of a no. of homogeneous metallocene catalysts (co-catalyst methylaluminoxane). Contrary to literature reports, it was found that even the simplest C2-sym. metallocenes promote the isotactic polymn.
Roberta Cipullo, Chadwick John C., Sudmeijer Olof, Anna Borriello, CIPULLO, ROBERTA, Borriello Anna, Olof Sudmeijer, John C. Chadwick, Vincenzo Busico, BUSICO, VINCENZO   +9 more
core   +1 more source

Ferrocenyl Lawesson's reagent-based porous organic polymers for efficient adsorption-assisted photocatalysis degradation of organic dyes

Heliyon
The adsorption process followed by photodegradation, adsorption-assisted photocatalysis, is an efficient way to achieve an enhanced overall removal of pollutants from wastewater.
Shadi Asgari, Ghodsi Mohammadi Ziarani, Aylar Naderahmadian, Elaheh Rajabinejad, Ahmad Amiri, Alireza Badiei   +5 more
doaj   +1 more source

Supported Organometallics. Highly Electrophilic Cationic Metallocene Hydrogenation and Polymerization Catalysts Formed via Protonolytic Chemisorption on Sulfated Zirconia

, 2016
Supported Organometallics. Highly Electrophilic Cationic Metallocene Hydrogenation and Polymerization Catalysts Formed via Protonolytic Chemisorption on Sulfated ...
Tobin J. Marks (1275348), Hongsang Ahn (2988807)   +1 more
core   +1 more source