Results 81 to 90 of about 2,167 (208)

Preparation of PP/2D-Nanosheet Composites Using MoS2/MgCl2- and BN/MgCl2-Bisupported Ziegler–Natta Catalysts

, 2020
Polypropylene/molybdenum disulfied (PP/MoS2) and Polypropylene/hexagonal boron nitride (PP/hBN) nanocomposites with varying concentration (0–6 wt %) were fabricated via in situ polymerization using two-dimensional (2D)-nanosheet/MgCl2-supported Ti ...
Keun-Byoung Yoon, Dong-Eun Lee, Byeong-Gwang Shin, He-xin Zhang   +3 more
core   +1 more source

Effect of EtOH/MgCl2 Molar Ratios on the Catalytic Properties of MgCl2-SiO2/TiCl4 Ziegler-Natta Catalyst for Ethylene Polymerization

Molecules, 2011
MgCl2-SiO2/TiCl4 Ziegler-Natta catalysts for ethylene polymerization were prepared by impregnation of MgCl2 on SiO2 in heptane and further treatment with TiCl4.
Piyasan Praserthdam, Supanan Patthamasang, Bunjerd Jongsomjit   +2 more
doaj   +1 more source

New insight in propene polymerization promoted by heterogeneous Ziegler-Natta catalysts

, 1999
45 years after the discovery of transition metals and organometallics as cocatalysts for the polymerization of olefins and for organic synthesis, these compounds have not lost their fascination.
SEGRE A. L, CIPULLO, ROBERTA, SUDMEIJER O., TALARICO, GIOVANNI, VACATELLO M, CHADWICK J. C, MONACO G, BUSICO V   +7 more
core   +1 more source

The influence of magnesium dichloride as support on molecular weights of the polyethylenes produced by Ziegler-Natta catalyst [PDF]

Polyolefins Journal
The paper presents data on the effect exerted by magnesium dichloride in Ziegler-Natta catalysts on the activity and molecular weight of polyethylene (PE) produced by ethylene polymerization in the absence or presence of hydrogen.
Tatiana Mikenas, A. Sholma, Vladimir A. Zakharov, Mikhail Matsko   +3 more
doaj   +1 more source

Well-Defined Ti Surface Sites in Ziegler-Natta Pre-Catalysts from 47/49Ti Solid-State Nuclear Magnetic Resonance Spectroscopy

Treatment of Ziegler-Natta (ZN) catalysts with BCl3 improves their activity by increasing the number of active sites. Here we show how 47/49Ti solid-state nuclear magnetic resonance (NMR) spectroscopy enables to understand the electronic structure of the
Sebastian, Sabisch, Christophe, Copéret, Alexander, Yakimov, Felipe, Morais Bolner, Jean, Raynaud, Christoph, Kaul, Pierrick, Berruyer, Yuya, Kakiuchi, Vincent, Monteil   +8 more
core   +1 more source

Development of Ziegler-Natta catalysts for the synthesis of polyolefins

, 2022
reservedLo scopo di questa tesi è la visione dello sviluppo di catalizzatori Ziegler-Natta per la sintesi di olefine. Vedremo cos'è un catalizzatore e nello specifico uno di tipo Ziegler-Natta, considerando i suoi componenti, gli effetti che hanno, l ...
MARCELLAN, GIOVANNI
core  

Innovative catalytic systems driving sustainable olefin polymerization: Recent advances and green chemistry approaches [PDF]

Polyolefins Journal
This mini-review addresses the burgeoning requirements for environmentally friendly processes in the polymer industry, focusing on recent progress in developing catalytic systems for sustainable olefin polymerization.
Farabi Hossain, Md Enamul Hoque
doaj   +1 more source

Ziegler–Natta Catalysts: Applications in Modern Polymer Science

SynOpen, 2023
Keshav Taruneshwar Jha, Abhimannu Shome, Pooja A Chawla   +2 more
doaj   +1 more source

Organische Trägermaterialien für Ziegler-Natta-Katalysatoren

, 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   +2 more sources

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