Cationic polymerization of 1,3-pentadiene in the presence of vanadium oxychloride

The cationic polymerization of 1,3-pentadiene in the presence of vanadium oxytrichloride is studied. 1,3-Pentadiene is shown to polymerize at a high rate to high monomer conversions in the absence of proton-donor compounds in the catalytic system. The initial rate of 1,3-pentadiene polymerization is...

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Bibliographic Details
Published in:Polymer science. Series B 2010-10, Vol.52 (9-10), p.575-583
Main Authors: Rozentsvet, V. A., Kozlov, V. G., Korovina, N. A., Monakov, Yu. B.
Format: Article
Language:English
Subjects:
Catalysis
Cationic polymerization
Chemistry
Chemistry and Materials Science
Consumption
Conversion
Microstructure
Monomers
Polymer Sciences
Polymerization
Vanadium
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Summary:The cationic polymerization of 1,3-pentadiene in the presence of vanadium oxytrichloride is studied. 1,3-Pentadiene is shown to polymerize at a high rate to high monomer conversions in the absence of proton-donor compounds in the catalytic system. The initial rate of 1,3-pentadiene polymerization is proportional to the concentration of VOCl 3 in the system and demonstrates an extremal dependence on the initial concentration of 1,3-pentadiene. The polymerization process is distinguished by an induction period whose duration increases with a decrease in the reaction temperature. Regardless of polymerization conditions, with an increase in the monomer conversion, the molecular-mass distribution of the polymer widens owing to formation of a high-molecular-mass fraction, which, depending on reaction conditions, can be consumed in formation of the gel fraction. It is shown that the degree of unsaturation and the microstructure of poly(1,3-pentadiene) are almost independent of the polymerization conditions.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090410090095