Results 101 to 110 of about 5,101 (224)

Ethylene and 1-butene Oligomerization with Benzimidazole Complexes of Nickel and Iron: A Case of Tandem Reaction

Reactions
The coordination chemistry of benzimidazole ligands combines σ donation and π backbonding. Owing to this electronic flexibility, benzimidazole ligands stabilize both electron deficient and electron-rich transition states in the catalytic cycle of Ziegler-
Nelson N. dos Santos, Marcos F. Silva, Alexandre F. Young, Marcos L. Dias, Mariana M. V. M. Souza   +4 more
doaj   +1 more source

Control of a Fluidized Bed Polyethylene Reactor [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2008
In present paper, dynamic behavior and control of a fluidized bed reactor for polyethylene production has been considered. A double active sites model for Ziegler-Natta catalysts is used for simulation of polymerization reaction. Hydrodynamic behavior of
Omid Vahidi, Mohammad Shahrokhi, Ahmad Mirzaei   +2 more
doaj  

Nanocrystalline TiO2 and halloysite clay mineral composite films prepared by sol-gel method:Synergistic effect and the case of silver modification to the photocatalytic degradation of basic blue- 41 azo dye in water [PDF]

, 2014
Tubular halloysite clay mineral and nanocrystalline TiO2 were incorporated in the preparation of nanocomposite films on glass substrates via sol-gel method at 450 °C.
Kaplani, E., Panagiotaras, D., Papoulis, D., Rapsomanikis, A., Stathatos, E.   +4 more
core  

Influence of the Ethanol Content of Adduct on the Comonomer Incorporation of Related Ziegler-Natta Catalysts in Propylene (Co)polymerizations. [PDF]

Polymers (Basel), 2023
Mehdizadeh M, Karkhaneh F, Nekoomanesh M, Sadjadi S, Emami M, Teimoury H, Salimi M, Solà M, Poater A, Bahri-Laleh N, Posada-Pérez S.   +10 more
europepmc   +1 more source

Heterogeneity of Active Sites in the Polymer Chain Transfer Reactions at Olefin Polymerization over Multisite Supported Ziegler-Natta Catalysts. [PDF]

Polymers (Basel), 2023
Matsko M, Zakharov V.
europepmc   +1 more source

Influência do agente de cloração do catalisador à base de veodímio e da razão molar Cl: Nd na polimerização do butadieno Influence of the chlorinating agent of neodymium based catalysts and Cl: Nd molar ratio on butadiene polymerization

Polímeros, 2009
Neste trabalho foi utilizado um sistema catalítico composto por hidreto de diisobutilalumínio (DIBAH), versatato de neodímio (NdV) e um agente de cloração para avaliar a influência da fonte de cloro e da razão molar Cl:Nd nas características da reação de
Cintia N. Ferreira, Ivana L. Mello, Fernanda M. B. Coutinho   +2 more
doaj   +1 more source

Synthesis of Early Transition Metal Bisphenolate Complexes and Their Use as Olefin Polymerization Catalysts [PDF]

, 2009
Bisphenolate ligands with pyridine- and benzene-diyl linkers have been synthesized and metalated with group 4 and 5 transition metals. The solid-state structures of some of the group 4 complexes have been solved.
Bercaw, John E., Golisz, Suzanne R.
core   +1 more source

Uma revisão sobre polimerização de olefinas usando catalisadores Ziegler-Natta heterogêneos A survey on olefins polymerization using heterogeneous Ziegler-Natta catalysts

Polímeros, 2011
A produção em larga escala de materiais poliméricos de elevado interesse industrial, provenientes da polimerização estereoespecífica de olefinas, tornou-se possível depois do advento dos catalisadores Ziegler-Natta.
Fabricio Machado, José Carlos Pinto
doaj  

Synthesis of poly(sulfonate ester)s by ADMET polymerization [PDF]

, 2016
Many hydrocarbon polymers containing heteroatom defects in the main chain have been investigated as degradable polyethylene-like materials, including aliphatic polyesters.
Balog, Sandor, Parkhurst, Rebecca R., Simon, Yoan C., Weder, Christoph   +3 more
core  

Nobelova nagrada za kemiju 2006. [PDF]

, 2006
Ovogodišnju Nobelovu nagradu za kemiju podijelila su trojica dobitnika: Francuz Yves Chauvin, Amerikanci Robert H. Grubbs i Richard R. Schrock. Prema obrazloÞenju Kraljevske švedske akademije znanosti, Nobelova nagrada dodijeljena im je za razvoj ...
L. Frkanec, T. Portada
core   +1 more source