Open AccessKinetic scheme of the SDRC rubber synthesis process
Author(s) -
V. V. Bronskaya,
Г. А. Аминова,
G. V. Manuyko,
Т. В. Игнашина,
D. V. Bashkirov,
О. В. Харитонова,
Denis Balzamov
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/548/6/062031
Subject(s) - polybutadiene , chain transfer , polymerization , natural rubber , macromolecule , chemistry , monomer , catalysis , reaction rate constant , polymer chemistry , kinetic chain length , kinetics , chemical engineering , kinetic scheme , polymer , copolymer , solution polymerization , organic chemistry , radical polymerization , biochemistry , physics , quantum mechanics , engineering
The research of the chemical kinetics of the SDRC rubber synthesis is performed under the optimal water content in the conditions of the chain transfer and cross-growth reactions. The main reactions of the butadiene polymerization mechanism on a cobalt-containing catalytic system that are a chain growth, a chain transfer to monomer, a chain transfer to polymer, spontaneous chain transfer, a chain cross growth reaction are presented. The main assumptions of the presented kinetic scheme are that active centres of one type are formed at the optimum water concentration, the total concentration of active centres is constant and equal to the initiator concentration, at the optimum water concentration the process is considered “uninterrupted” (there is no deactivation). The article presents the theoretical foundations of chemical kinetics of the SDRC rubber synthesis. The cross-growth reaction of polybutadiene macromolecules is possible only through conjugated double bonds, the number of which in the macromolecule is limited. Therefore, this reaction can carry out without gelation to large monomer conversion values. In this regard, the mechanism of the butadiene polymerization reaction on a cobalt catalyst based on the cross growth reaction of “living” macromolecules with “living” and “dead” macromolecules was also considered.