Results 311 to 320 of about 124,501 (357)

Zirconium complexes in homogeneous ethylene polymerization

Journal of Coordination Chemistry, 2011
This article reviews the recent progress of zirconium complexes for ethylene polymerization. Zirconium complexes are one of the most important types of catalysts for homogeneous ethylene polymerization. Polymerization behavior and polymer structure can be adjusted through the balancing of ligand structure.
Ataf Ali Altaf, Amin Badshah, Nasir Khan, Shafiqullah Marwat, Saqib Ali   +4 more
openaire   +1 more source

Emulsion polymerization of ethylene. I. Polymerization formulas and conditions

Journal of Applied Polymer Science, 1965
Formulas and operating conditions for the emulsion polymerization of ethylene are described. Stable latex products were obtained with a variety of anionic and nonionic emulsifiers, but for the majority of the work fatty acids or polyethoxylated alkyl phenols were used.
Arthur F. Helin, Harry K. Stryker, Gerald J. Mantell   +2 more
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Titanium-biphenoxide catalysts for ethylene polymerization

Journal of Polymer Research, 2012
Titanium (IV) complexes containing sterically bulky ligands such as 2, 2′- methylenebis (4-methyl-6-tert butyl phenol) (MBTP) were synthesized by stoichiometric reaction between Ti(IV)alkoxide or halide and the biphenol. These catalyst precursors formulated as [Ti(O^O)RR′] were characterized by physicochemical and spectroscopic methods.
Akshay Mehta, Gopal Tembe, Prashant Umare, Marzena Białek, Parimal Parikh, Girish Mehta   +5 more
openaire   +1 more source

Promoting ethylene polymerization through cocatalyst modification

Polymer Bulletin, 2015
Effect of chlorocyclohexane (CHC) on ethylene polymerization using MgCl2/TiCl4/TEA Ziegler–Natta catalyst system was studied, where MgCl2, TiCl4, and TEA (triethyl aluminum) were used as support, catalyst, and activator, respectively. The polymerization rate, catalyst activity, and produced polymer were significantly affected by the presence of CHC as
Sadegh Abedi, Noushin Majdabadi-Farahani, Majid Daftari-Besheli, Hamidreza Ghasempour, Farhad Azadi   +4 more
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Substituted chromocenes for ethylene polymerization catalysts

Journal of Molecular Catalysis, 1991
Abstract Four different chromocenes, in which two hydrogen atoms in the 1 and 1' positions have been substituted by ethyl, t-butyl, trimethylsilyl and phenyl groups, have been reacted with silica gel. As in the case with chromocene (IR bands of adsorbed CO at 2047.1, 1972.2, 1917.2, 1824.1 and 1621.4 cm−1) five strong CO bands are observed, of which ...
B. Rebenstorf, C. Panda
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Polymerization of ethylene glycol dimethacrylate

Journal of Polymer Science, 1959
AbstractIn the polymerization of ethylene glycol dimethacrylate (EDMA), the content of pendant double bonds (PDB) in the polymer was found to be lower than expected, hence it was deduced that the intramolecular cyclizations occurred in the polymerization.
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ETHYLENE POLYMERIZATION USING THE PHILLIPS CATALYST

2023
The Phillips catalyst, chromate on silica support, is widely used to manufacture polyethylene. It is activated in an oxygen-rich environment before conducting polymerization. The polymerization involves an initial period of inactivity called the induction period, during which active site formation occurs, and ethylene acts as a reductant. To avoid this
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Rate of Ethylene Polymerization

Industrial & Engineering Chemistry, 1938
F. R. Russell, H. C. Hottel
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Bifunctional ionomers for efficient co-electrolysis of CO2 and pure water towards ethylene production at industrial-scale current densities

Nature Energy, 2022
Gongwei Wang, Li Xiao, Lin Zhuang
exaly  

Organometallics in Ethylene Polymerization

Industrial & Engineering Chemistry, 1957
H. N. Friedlander, Katashi. Oita
openaire   +1 more source