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Free radical polymerization of ethylene—IV. Kinetics of the heterophase polymerization of ethylene
Polymer Science U.S.S.R., 19635. R. S. STEARUS and L. E. FORMAN, J. Polym. Sei. 41: 381, 1960; A. K. TOBOLSKY and C. E. ROGERS, J. Polym. Sci. 41: 73, 1959 6. K. F. O'DRISCOLL and A. K. TOBOLSKY, J. Polym. Sci. 35: 259, 1959 7. A. A. KOROTKOV, S. P. MITSENGENDLER and V. N. KRASULINA, International Symposium on Macromolecular Chemistry, section II, p. 208. Moscow, June, 1960 8.
S.G. Lyubetskii, V.V. Mazurek
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Pressure induced polymerization of fluid ethylene
The Journal of Chemical Physics, 2016The spontaneous polymerization of fluid ethylene under high temperature and pressure conditions has been characterized by using FTIR absorption spectroscopy. The fluid has been isobarically heated at pressures ranging between 0.4 and 1.5 GPa by means of a resistively heated membrane diamond anvil cell.
SCELTA, DEMETRIO +2 more
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Chromocene catalysts for ethylene polymerization: Scope of the polymerization
Journal of Polymer Science Part A-1: Polymer Chemistry, 1972AbstractChromocene deposited on silica supports of high surface area forms a highly active catalyst for polymerization of ethylene. Polymerization is believed to occur by a coordinated anionic mechanism previously outlined. The catalyst formation step liberates cyclopentadiene and leads to a new divalent chromium species containing a cyclopentadienyl ...
Frederick J. Karol +5 more
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Journal of Polymer Science Part A: Polymer Chemistry, 1999
Kinetics of ethylene homopolymerization reactions and ethylene/1-hexene copolymerization reactions using a supported Ziegler–Natta catalyst was carried out over a broad range of reaction conditions. The kinetic data were analyzed using a concept of multicenter catalysis with different centers that respond differently to changes in reaction parameters ...
Y. V. Kissin, R. I. Mink, T. E. Nowlin
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Kinetics of ethylene homopolymerization reactions and ethylene/1-hexene copolymerization reactions using a supported Ziegler–Natta catalyst was carried out over a broad range of reaction conditions. The kinetic data were analyzed using a concept of multicenter catalysis with different centers that respond differently to changes in reaction parameters ...
Y. V. Kissin, R. I. Mink, T. E. Nowlin
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Journal of Polymer Science Part A: Polymer Chemistry, 1999
Ethylene polymerization reactions with many Ziegler–Natta catalysts exhibit several features which differentiate them from polymerization reactions of α-olefins: a relatively low ethylene reactivity, higher polymerization rates in the presence of α-olefins, a high reaction order with respect to ethylene concentration, and strong reversible rate ...
Y. V. Kissin, A. J. Brandolini
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Ethylene polymerization reactions with many Ziegler–Natta catalysts exhibit several features which differentiate them from polymerization reactions of α-olefins: a relatively low ethylene reactivity, higher polymerization rates in the presence of α-olefins, a high reaction order with respect to ethylene concentration, and strong reversible rate ...
Y. V. Kissin, A. J. Brandolini
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European Polymer Journal, 1996
Abstract The effect of polymerization temperature on catalyst activity and polymer properties in the polymerization of ethylene was studied. The catalyst system was a homogeneous metallocene catalyst Cp2ZrCl2 with methylaluminoxane (MAO) as a cocatalyst.
Mari Eskelinen, Jukka V. Seppälä
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Abstract The effect of polymerization temperature on catalyst activity and polymer properties in the polymerization of ethylene was studied. The catalyst system was a homogeneous metallocene catalyst Cp2ZrCl2 with methylaluminoxane (MAO) as a cocatalyst.
Mari Eskelinen, Jukka V. Seppälä
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Morphology of plasma-polymerized ethylene
Journal of Applied Physics, 1973A highly crosslinked amorphous polymer is produced by passing ethylene through a radio-frequency electric discharge. The morphology of plasma-polymerized ethylene is examined by replica electron microscopy. It is found that at low pressures and flow rates spherical powder particles are formed ranging in size between 0.2 and 1.2 μm.
M. Niinomi +3 more
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Simulation of Slurry Polymerization of Ethylene
International Journal of Chemical Reactor Engineering, 2008A model of slurry polymerization of ethylene in a multistage continuous stirred-tank reactor (CSTR) was developed in order to find the effect of stagewise variation of parameters on polymer polydispersity and rate of polymerization. Higbie's penetration theory has been used to calculate monomer absorption rate in the presence of micron-sized single ...
Nipun J Soni, Sunil S Bhagwat
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Heterogeneous radical polymerization of ethylene
Polymer, 1962Abstract In the course of investigating the polymerization of ethylene initiated by azoisobutyronitrile in the presence of small amounts of benzene at 100 to 600 atm and at 70°C several unusual features were found, connected with an unusual polymerization mechanism.
B ERUSSALIMSKY +4 more
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Studies on methylaluminoxane and ethylene polymerization
Journal of Molecular Catalysis, 1994Abstract The preparation and structure of methylaluminoxane (MAO) was studied. MgCl2·6H2O was chosen as the new hydrolyzing agent for trimethylaluminium (TMA). The effects of the temperature, reaction time and ratio of MgCl2·6H2O to TMA on TMA hydrolyzing were observed. The yields of MAO were 23–50%.
Kequan Peng, Shijing Xiao
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