Results 31 to 40 of about 94,776 (218)

Structural Characterization of the EtOH–TiCl₄–MgCl₂ Ziegler–Natta Precatalyst [PDF]

, 2016
The Ziegler–Natta polymerization is one major example of application of catalysis in industry. Since the first discovery of Ziegler and Natta, several modifications of the catalyst have been developed, in order to improve its performance.
D. Gajan (2925687), K. Sanders (2925693), G. Pintacuda (2311231), V. Monteil (1737115), A. Lesage (2730706), V. D’Anna (2106346), S. Norsic (2925684), A. J. Pell (2925690), C. Copéret (2925681), P. Sautet (1964296)   +9 more
core   +2 more sources

Speciation, Structural Refinement, and Distribution of Ti Sites in Titanium Silicalite‐1 From 47/49Ti NMR Crystallography at 28.2 Tesla

Angewandte Chemie, Volume 138, Issue 15, 6 April 2026.
Titanium silicalite‐1 (TS‐1), used in industrial selective oxidation processes, depends on specific, yet still unresolved Ti sites, dispersed within the framework of an MFI‐zeolite. Applying high field (28.2 T) 47/49Ti NMR and 17O NMR spectroscopy for an array of TS‐1 catalysts enables the development of an NMR crystallography protocol and the ...
Christoph J. Kaul, Jonas Koppe, Lukas Lätsch, Michael Wörle, Sadig Aghazada, Jacob B. Holmes, Christina Wartmann, Mingji Zheng, Albrecht Berkessel, Trees De Baerdemaeker, Andrei‐Nicolae Parvulescu, Karsten Seidel, J. Henrique Teles, Alexander V. Yakimov, Christophe Copéret   +14 more
wiley   +2 more sources

Determination of Optimal Reaction Temperature and Hydrogen Amount for Propylene Polymerization by a Mathematical Model [PDF]

Kemija u Industriji, 2019
Regarding the complexity of Ziegler-Natta catalyst kinetics in polypropylene polymerization, so far, there is no adequate model to determine the best process conditions for predicting average molecular weight and dispersity as the most crucial final ...
Gholam Hossain Varshouee, Amir Heydarinasab, Ali Vaziri, Seyed Mehdi Ghafelebashi Zarand   +3 more
doaj   +1 more source

POLYMERIZATION OF STYRENE USING ZIEGLER – NATTA CATALYST TYPE TICL4/MGCL2 – EB /ALET3 [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2013
In this study Ziegler – Natta catalyst was prepared which is a multi component catalytic system composed of, titaniumtetrachloride (TiCl4) as a active material, anhydrous magnesium chloride MgCl2 as support (carrier) which distribute the active material,
AYAD A. UTTAR, ALI S. ABED
doaj   +1 more source

In situ stabilization of polypropylene by lignin using a Ziegler-Natta catalyst [PDF]

Polyolefins Journal, 2014
A fourth-generation Ziegler-Natta catalyst was prepared to synthesize polypropylene (PP), which was stabilized by in situpolymerization employing lignin as antioxidant.
Maria Marques, Renato Oliveira, Rafael Araujo, Bruno Amantes   +3 more
doaj   +1 more source

Visible‐Light Driven Acetylene Semi‐Hydrogenation to Ethylene With a Copper Photosensitizer and a Cobaloxime Catalyst

Chemistry – A European Journal, EarlyView.
A fully noble‐metal‐free photocatalytic system that couples cobaloxime catalysis with Cu photosensitizer for HAT‐driven acetylene‐to‐ethylene conversion is reported. ABSTRACT The purification of ethylene streams from acetylene impurities remains a key industrial challenge, for which light‐powered strategies are emerging as sustainable alternatives to ...
Anna Fortunato, Sharon Silloni, Brando Adranno, Marianna Barbieri, Luka Đorđević, Francesca Arcudi   +5 more
wiley   +1 more source

Quality control for Ziegler-Natta catalysis via spectroscopic fingerprinting [PDF]

, 2018
Commercial olefin polymerization catalysts are typically produced at a manufacturing site before transport to production facilities for storage and eventual use.
Vantomme, Aurélien, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Pletcher, Paul, Welle, Alexandre, Weckhuysen, Bert M.   +5 more
core   +1 more source

Impact of Commercial Polyolefin Architecture and Composition on Its Ability to Compatibilize High‐Density Polyethylene/Isotactic Polypropylene Blends

Journal of Polymer Science, EarlyView.
This research elucidates the relationship between the molecular structure of commercially available ethylene–propylene copolymers and an ethylene/1‐olefin copolymer and its ability to compatibilize high‐density polyethylene/isotactic polypropylene blends. These findings indicate that the compatibilization of these blends with random copolymers benefits
Bailey Eberle, Susan K. Houston, Hannah Giffin, Mark Dadmun   +3 more
wiley   +1 more source

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

Advanced Functional Materials, Volume 36, Issue 47, 11 June 2026.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi, Norma Mallegni, Andrea Dorigato, Mario Milazzo   +3 more
wiley   +1 more source

DIENES POLYMERISATION WITH METATHESIS AND ZIEGLER-NATTA HOMOGENEOUS CATALYSTS

, 1991
IN THIS THESIS THE POLYMERISATION OF DIENES WITH ZIEGLER-NATTA AND METATHESIS CATALYSTS IS DESCRIBED AND THE RELATION BETWEEN THE TWO TYPES OF POLYMERISATION IS EXAMINED.
Μπόκαρης, Ευθύμιος
core   +1 more source