Study of immobilized catalysts. XXI. Synthesis and structure of titanomagnesium catalysts on polymer carriers
Methods of synthesis of polymer carriers with an organometallic functional coating were developed, and grafted titanomagnesium catalysts (GTMC) based on them were obtained. The formation of isolated Ti(III) ions was detected by the EPR method. Depending on the conditions of synthesis and type of polymer carrier, their amount reached 55% of the immobilized titanium. Experimental proofs were obtained for the formation of Ti(III) via the stage of alkylation of Ti(IV) by a magnesium-containing coating. Based on the dependence of the g-factor of the Ti(III) signals on the conditions of its formation, it was suggested that the fragments of the polymer carrier enter the coordination sphere of Ti(III) at low Ti(III) concentrations in the GTMC and that stratification reactions of Ti(III) take place at high concentrations. The existence of crystallites of the active phase with dimensions of the regions of coherent scattering of 40-75 A was found by x-ray diffraction analysis. A correlation was found between the activity of GTMC in the polymerization of ethylene and the Ti(III) content in them in the form of isolated ions.
- Research Organization:
- Institute of Chemical Physics, Chernogolovka, USSR
- OSTI ID:
- 5845574
- Journal Information:
- Kinet. Catal. (Engl. Transl.); (United States), Vol. 27:4; Other Information: Translated from Kinet. Katal.; 27: No. 8, 914-919(Jul-Aug 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
36 MATERIALS SCIENCE
GRAFT POLYMERS
CHEMICAL RADIATION EFFECTS
COMPLEXOMETRY
ELECTRON SPIN RESONANCE
SYNTHESIS
X-RAY DIFFRACTION
MAGNESIUM COMPOUNDS
CATALYTIC EFFECTS
TITANIUM COMPOUNDS
ALCOHOLS
ALKYLATION
AMINES
CARBON 14 COMPOUNDS
CATALYST SUPPORTS
CATALYSTS
COBALT 60
GAMMA RADIATION
HETEROGENEOUS CATALYSIS
IRRADIATION
KETONES
ORGANOMETALLIC COMPOUNDS
POLYETHYLENES
TRACER TECHNIQUES
ALKALINE EARTH METAL COMPOUNDS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CATALYSIS
CHEMICAL REACTIONS
CHEMISTRY
COBALT ISOTOPES
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC RADIATION
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LABELLED COMPOUNDS
MAGNETIC RESONANCE
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOISOTOPES
RESONANCE
SCATTERING
TRANSITION ELEMENT COMPOUNDS
YEARS LIVING RADIOISOTOPES
400201* - Chemical & Physicochemical Properties
400600 - Radiation Chemistry
360602 - Other Materials- Structure & Phase Studies