Hecheng xiangjiao gongyeThe precursor MgCl2 · nROH of supported Ziegler Natta catalyst was prepared by chemical activation method, and different pre catalysts TiCl4/MgCl2 (C-Cat) were prepared by loading TiCl4.
FAN Xun-zhang, ZHAO Yuan-jin, LUO Shu-fang, HE Ai-hua?
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Kinetic resolution of racemic {alpha}-olefins with ansa-zirconocene polymerization catalysts: Enantiomorphic site vs. chain end control [PDF]
, 2006 Copolymerization of racemic {alpha}-olefins with ethylene and propylene was carried out in the presence of enantiopure C1-symmetric ansa metallocene, {1,2-(SiMe2)2({eta}5-C5H-3,5-(CHMe2)2)({eta}5-C5H3)}ZrCl2 to probe the effect of the polymer chain end ...
Bercaw, John E., Byers, Jeffery A.
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A mathematical model for the sequestering of chemical contaminants by magnetic particles [PDF]
, 2010 A mathematical model is developed and implemented to characterize the pickup of various liquid chemical contaminants by polyethylene-coated magnetic particles.
Booker N. A. +5 more
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Small Methods, Volume 10, Issue 2, 22 January 2026.A sustainable alternative to the energy‐intensive traditional thermocatalytic hydrogenation of acetylene to ethylene is reported. The catalyst is a cobalt single‐atom catalyst supported on carbon nitride that is powered by visible light, uses water as a proton source and demonstrates high selectivity, stability, and recyclability.
Anna Fortunato +8 more
wiley +1 more source
Correlation Between Vinyl Content of Recycled HDPE and Polymer Degradation: An NMR Approach
Journal of Applied Polymer Science, Volume 142, Issue 47, December 15, 2025.The degradation behavior of high‐density polyethylene (HDPE) during recycling depends on its vinyl group content. This study shows that 1H NMR spectroscopy enables accurate assessment of vinyl groups unlike FTIR. Changes in melt flow and molecular weight with multiple processing are linked to vinyl content which could enable tailor‐made re‐additivation
Kim Hao Ng +3 more
wiley +1 more source
ReactionsIn 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 +3 more
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Chemical state analysis of magnesium-supported Ziegler-Natta catalyst by soft X-ray emission spectrometer (SXES) after contact with alkyl aluminum [PDF]
Polyolefins JournalThis report is on the characterization of active Ti center in heterogeneous Ziegler-Natta catalysts with Soft X-ray Emission Spectrometer (SXES). Since titanium in the catalyst has various chemical bonds, it is important to grasp the chemical bond state.
Masayoshi Saito +6 more
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CHAIN REGULARITY OF ISOTACTIC POLYPROPYLENE DETERMINED BY DIFFERENT THERMAL FRACTIONATION METHODS [PDF]
, 2014 The chain regularity of isotactic polypropylene (iPP) homo- and random copolymers was characterized by different thermal fractionation methods in this study. Different stepwise temperature programs were applied in a calorimeter (DSC), in order to develop
Doshev, Petar +6 more
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Macromolecular Rapid Communications, Volume 46, Issue 23, December 5, 2025.Can artificial intelligence fully replace humans in polymer discovery? How can we effectively harness AI's potential while preserving human creativity, ethics, and expertise? Does AI introduce new biases and interpretability challenges into SDL? This perspective aims to answer these important questions and advocates for symbiotic human‐AI intelligence ...
Bahar Dadfar +2 more
wiley +1 more source
The production of high efficiency Ziegler-Natta catalyst with dual active sites nature using cyclohexyl chloride as promoter with super activity and produced superior polyethylene with controllable molecular weight distribution. [PDF]
Des Monomers Polym, 2017 Seifali Abbas-Abadi M.
europepmc +3 more sources