Results 61 to 70 of about 13,429 (306)

A Suzuki Coupling Based Route to 2,2'-Bis(2-indenyl)biphenyl Derivatives [PDF]

, 2002
Because of the promising performance in olefin polymerization of 2,2'-bis(2-indenyldiyl)biphenyl zirconium dichloride, we developed a new and broadly applicable route to 2,2'-bis(2-indenyl)biphenyl derivatives.
Arts, Henricus J.,, Beijer, Felix H.,, Gruter, Gert-Jan M.,, IJpeij, Edwin G.,, Newton, Claire,, Vries, Johannes G. de,   +5 more
core   +3 more sources

Structural Characterization of Electron Donors in Ziegler–Natta Catalysts [PDF]

The Journal of Physical Chemistry C, 2018
Ziegler-Natta catalysis is a very important industrial process for the production of polyolefins. However, the catalysts are not well-understood at the molecular level. Yet, atomic-scale structural information is of pivotal importance for rational catalyst development.
E. S. Merijn Blaakmeer, Giuseppe Antinucci, Andrea Correa, Vincenzo Busico, Ernst R. H. van Eck, Arno P. M. Kentgens   +5 more
openaire   +5 more sources

"Supported Ziegler-Natta catalysts from MgCl2·nROH precursors and its catalytic behaviors for diene copolymerization"

Hecheng xiangjiao gongye
The precursor MgCl2 · nROH of supported Ziegler Natta catalyst was prepared by chemical activation method, and different pre catalysts TiCl4/MgCl2 (C-Cat) were prepared by loading TiCl4.
FAN Xun-zhang, ZHAO Yuan-jin, LUO Shu-fang, HE Ai-hua?
doaj   +1 more source

Nano-Dispersed Ziegler-Natta Catalysts for 1 μm-Sized Ultra-High Molecular Weight Polyethylene Particles

Frontiers in Chemistry, 2018
A catalytic approach to synthesize microfine ultra-high molecular weight polyethylene (UHMWPE) particles was proposed based on the exploitation of nano-sized catalysts.
Patchanee Chammingkwan, Yusuke Bando, Minoru Terano, Toshiaki Taniike   +3 more
doaj   +1 more source

Production of titanium tetrachloride (TiCl4) from titanium ores: A review [PDF]

Polyolefins Journal, 2017
Titanium (Ti) is the ninth most abundant element on earth. The titanium mineral ores are widely distributed in different parts of the world. The two main ores of titanium include rutile (TiO2) and ilmenite (FeO.TiO2).
Hossein Bordbar, Ali Akbar Yousefi, Hossein Abedini   +2 more
doaj   +1 more source

On the Bona Fide Sampling of Reaction Candidates in Red Moon Method by Replica‐Exchange Molecular Dynamics Method: REMD‐RM Method and Its Efficacy in Polymerization and Cross‐Linking Reactions of Polypropylene

Journal of Computational Chemistry, Volume 47, Issue 7, March 15, 2026.
Schematic representation of the REMD‐RM method, which integrates the Red Moon (RM) method and the replica‐exchange molecular dynamics (REMD) method. By enhancing molecular reconfiguration and diffusion in the reactant system, the REMD‐RM method can efficiently explore a wide phase space and effectively accelerate the search for reaction candidates ...
Kentaro Matsumoto, Yuichi Tanaka, Seiryu Umetani, Takashi Nakano, Masataka Nagaoka   +4 more
wiley   +1 more source

Olefin Polymerizations Oriented by Rational Designs of Group‐13 Compounds

The Chemical Record, Volume 26, Issue 3, March 2026.
In coordination olefin polymerization chemistry, boron and aluminum compounds play important roles in both catalyst components and monomers. This personal account introduces our recent progress on the development of catalyst systems featured by the design of group‐13 counteranions, as well as the application of boronic acid‐crosslinked polyolefins to ...
Ryo Tanaka, Yu Zou
wiley   +1 more source

An Investigation on Polymerization of Ethylene by Ziegler-Natta Catalyst in the Presence of a Promoter: Polymerization Behavior and Polymer Microstructure

Bulletin of Chemical Reaction Engineering & Catalysis, 2018
The effect of a halocarbon (ethyl chloride) as a promoter on a Ziegler-Natta catalyst composed of‌ T‌iCl4 (catalyst), AlEt3 (activator) and Mg(OEt)2 (support) in the polymerization of ethylene have been investigated.
Yaghoob Gholami, Majid Abdouss, Sadegh Abedi, Farhad Azadi, Pezhman Baniani, Maryam Arsalanfar   +5 more
doaj   +1 more source

Study of Ethylene Polymerization Kinetics by TiCl4/Mg(OC2H5)2 Catalyst and Determination of the Active Sites Concentration [PDF]

علوم و تکنولوژی پلیمر, 2008
Ethylene was polymerized in slurry phase over a TiCl4/Mg(OC2H5)2 catalyst activated by Al(C2H5)3. It was shown experimentally that mass transfer resistance has no effect on polymerization kinetics.
S. Hakim, M.M. Mortazavi
doaj   +1 more source

Heterogeneous Distribution of Entanglements in a Nonequilibrium Polymer Melt of UHMWPE: Influence on Crystallization without and with Graphene Oxide [PDF]

, 2016
In the past, studies have been performed to follow chain dynamics in an equilibrium polymer melt using low molar mass polymers. Here we show that in linear ultrahigh molecular weight polyethylene entanglements formed during or after polymerization are ...
Dario Romano, Ele L. de Boer, Ferry J. D., Kangsheng Liu, Sanjay Rastogi, Sara Ronca, Yefeng Yao   +6 more
core   +4 more sources