Results 71 to 80 of about 470,273 (164)
, 2023 Le développement d'un nouveau catalyseur de type Ziegler-Natta à base de Fe, FeCl2/MgCl2(THF)x/BCl3, s'inscrit dans un contexte mondial d'augmentation des ressources en métaux alternatifs pour la catalyse et les nouveaux matériaux polymères.
Morais Bolner, Felipe
core +2 more sources
Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization [PDF]
Polyolefins Journal, 2017 The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization.
Farshid Nouri-Ahangarani +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 [PDF]
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 +8 more
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Journal of Taibah University for ScienceCleaner polymer production involves minimizing environmental impact by using efficient catalysts and eco-friendly synthesis methods. Identifying active and stable catalysts is essential.
Rafik Rajjak Shaikh +3 more
doaj +1 more source
MgCl2 Support Preparation Techniques and Their Effects on Ziegler-Natta Catalysts Performance in Propylene Polymerization [PDF]
علوم و تکنولوژی پلیمر, 2013 A primary adduct of MgCl2.3.3EtOH (A0) was prepared by melt quenching and then it was further dealcoholated by thermal and chemical methods. In thermal dealcoholation, two different support samples with MgCl2.2.7EtOH (A1) and MgCl2.1.8EtOH (A2) formulas ...
Najmeh Hadian +3 more
doaj +1 more source
Potential of Thermoset Polyolefins for FRP Concrete Reinforcing Bars
Polymer Composites, Volume 47, Issue 18, Page 16155-16176, 20 September 2026.Overview of XLPO and pDCPD resins for FRP reinforcing bars, highlighting resin chemistry, key performance characteristics, fiber sizing interactions, and principal degradation mechanisms in concrete environments. ABSTRACT Although thermoset polyolefins offer resistance to hydrolytic degradation and favorable processing characteristics, their potential ...
Osama Omar +5 more
wiley +1 more source
Advanced Synthesis &Catalysis, Volume 368, Issue 18, 19 September 2026.A general C─C cross‐coupling method employing earth‐abundant organoaluminium nucleophiles is enabled by electronically highly donating and sterically demanding ylide‐substituted phosphine (YPhos) ligands under Pd catalysis. This protocol represents an organoaluminium cross‐coupling that operates with a single catalyst system across all carbon ...
Nicolas Kaiser +3 more
wiley +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 +7 more
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Ziegler-Natta Catalysts: Regioselectivity and "hydrogen Response"
, 2020 Advanced High Throughput Experimentation (HTE) methods were applied to quantify the regioselectivity and the so-called "hydrogen response" in propene polymerization of four Ziegler-Natta catalysts representative of the three latest industrial generations
Meppelder A. +4 more
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A Unified Model Explaining Heterogeneous Ziegler-Natta Catalysis [PDF]
, 2015 We propose a model for MgCl2 supported Ziegler-Natta catalysts capable to reconcile the discrepancies emerged in the last 20 years, when experimental data were tried to be rationalized by molecular models.
Fan, Zhiqiang +9 more
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