Results 51 to 60 of about 470,273 (164)

One century of teaching, research, and innovation in chemical engineering in Mexico: The role of chemical engineering in the background and future of polymer science and industrial production in Mexico

The Canadian Journal of Chemical Engineering, EarlyView.
Timeline of key academic milestones and individuals that shaped chemical engineering at FQ‐UNAM and in Mexico. Abstract One hundred years after the beginning of the teaching of Chemical Engineering in Mexico, which started in 1925 in the former National School of Chemical Sciences, currently Faculty of Chemistry (FQ) at National Autonomous University ...
Patricia Pérez‐Salinas, Alberto Rosas‐Aburto, Eduardo Vivaldo‐Lima   +2 more
wiley   +1 more source

Paramagnetic species in Ziegler Natta catalysts

, 2023
: This doctoral thesis investigates the nature and behavior of paramagnetic Ti(III) species in industrial Ziegler-Natta catalysts (ZNCs) used for the polymerization of polyethylene and polypropylene and is the result of a collaborative effort between the
Podvorica, Leonora
core   +1 more source

Influence of THF as Internal‐Donor on Ziegler‐Natta Polyethylene Catalysts

Macromolecular Reaction Engineering, EarlyView.
Ziegler–Natta catalysts remain widely applied due to robustness, handling ease, and cost‐effectiveness. To support further optimization, we examine how internal donors such as tetrahydrofuran influence catalyst performance and polymer characteristics.
Alexander Mottl, Sarah Brunner, Patrik Schneider, Fabian Hofmann, Moritz Pischulti, Dario Pindirc, Clemens Schwarzinger, Christian Paulik   +7 more
wiley   +1 more source

Probing into morphology evolution of magnesium ethoxide particles as precursor of Ziegler-Natta catalysts [PDF]

Polyolefins Journal, 2016
Mg(OEt)2 with spherical morphology is one of the most important precursors for the preparation of industrial Ziegler-Natta catalysts. In the present article, morphology evolution of Mg(OEt)2 particles is studied in the course of the synthesis.
Goond Hongmanee, Patchanee Chammingkwan, Toshiaki Taniike, Minoru Terano   +3 more
doaj   +1 more source

Organische Trägermaterialien für Ziegler-Natta-Katalysatoren [PDF]

, 2017
Ziel dieser Arbeit war die Entwicklung eines auf einem organischen Trägermaterial basierenden Ziegler-Natta-Katalysatorsystems, welches die erforderliche Fragmentierbarkeit in möglichst kleine Fragmente aufweist.
Nietzel, Sven Ingo
core   +1 more source

Tailoring polypropylene properties by package of internal/external donor in Ziegler Natta catalysts [PDF]

Polyolefins Journal
Insights have been developed into the influence of different structures, including bismethoxymethylfluorene (B) and 2,2-diisopropyl succinate (I), on both internal donor (ID) and external donor (ED) roles on the performance of MgCl2/ID/TiCl4.
Nona Ghasemi Hamedani, Fatemeh Poorsank, Hassan Arabi, Seyed Mehdi Ghafelehbashi   +3 more
doaj   +1 more source

Extensional Rheology and Extrusion Blow Molding of Idealized High‐Density Polyethylene/Polypropylene Blends as Model Post‐Consumer Resins

Journal of Polymer Science, EarlyView.
Compatibilization markedly improves the top‐load compression performance and structural integrity of HDPE/PP blow‐molded bottles. Neat HDPE, PP, and HDPE/PP bottles exhibit premature neck cracking at relatively low strains, whereas the compatibilized HDPE/PP/C blend sustains substantially higher loads and greater deformation without cracking ...
Gabe Cihlar, Ethan Graetz, Ryan C. Xu, Alex M. Jordan, Wei Zheng   +4 more
wiley   +1 more source

Theoretical Study of the Halogen Concentration Effect on the 1,3-Butadiene Polymerization Catalyzed by the Neodymium-Based Ziegler–Natta System

Reactions
In this work, an attempt is made to theoretically substantiate the experimentally known facts of the influence of halogen concentration on the catalytic properties of the neodymium-based Ziegler–Natta system.
Alexey N. Masliy, Ildar G. Akhmetov, Andrey M. Kuznetsov, Ilsiya M. Davletbaeva   +3 more
doaj   +1 more source

Role of 1D and 2D Materials in Achieving Transparent and Flexible Lithium‐Ion Batteries for Wearable Electronics

Small, EarlyView.
Hybrid 1D–2D architectures redefine material design strategies for TFLIBs by decoupling competing performance parameters. This approach accelerates the transition of TFLIBs from proof of concept to practical wearable technologies. ABSTRACT Transparent and flexible lithium‐ion batteries (TFLIBs), enabled by advanced nanomaterials and flexible ...
Raviraj Madesan, Anand Sreekantan Thampy
wiley   +1 more source

Discovery and development of metallocene-based polyolefins with special properties [PDF]

Polyolefins Journal, 2015
Beside Ziegler-Natta and Phillips catalysts the development of methylaluminoxane (MAO) as cocatalyst in combination with metallocenes or other transition metal complexes for the polymerization of olefins has widely increased the possibilities in ...
Walter Kaminsky, Mercia Fernandes
doaj   +1 more source