Functionalized styrene-butadiene copolymers based on improved metal-alcoholate systems
https://doi.org/10.20914/2310-1202-2021-4-302-307
Abstract
A method for preparing functionalized styrene-butadiene copolymers on a new initiating system, which is a modifier consisting of a mixed sodium-calcium alkoxide of oxypropylated aniline dissolved in ?-methylstyrene and n-butyllithium has been developed. It was revealed that the lowered content of calcium ions makes it possible to obtain a modifier without colloidal fine-dispersed sludge, which negatively affects the operation of equipment in the industrial production of rubbers. The high initiation activity on lithium amides promoted a high conversion of monomers and a good stereoregulating ability of the 1.2-unit content of the butadiene part of the copolymer macromolecule, amounting to 66-68 wt%. The addition of a reactive compound to the end of the "living" polymer chain, stannous tetrachloride, improves the technological properties estimated by the Mooney viscosity, which increased by 5 units. It was shown on the example of prototypes of rubber mixtures, the polymer base of which was functionalized styrene-butadiene rubbers, that they are characterized by a sufficiently high rate of vulcanization, and in terms of technological, elastic and strength properties, the samples are identical with the foreign analogue NS-616, in terms of abrasion resistance they surpass the imported analogue by 20%, in resistance to crack growth by 36% was shown. The rubber mixture based on functionalized rubber was characterized by better adhesion on ice. The use of functionalized rubbers instead of serial rubber has little effect on tire rolling losses. A slight decrease in tan ? values at 0 °C for rubbers based on functionalized rubbers was noted, which can be compensated for by adjusting their microstructure and requires additional research.
About the Authors
A. V. Firsova
Voronezh branch of the Federal State Unitary Enterprise "Scientific Research Institute of Synthetic Rubber"
Russian Federation
Russian Federation
cand. sci. (Engin.), senior researcher, solution polymerization laboratory, Mendeleev street, 3«B» Voronezh, 394014, Russia
A. G. Kharitonov
Voronezh branch of the Federal State Unitary Enterprise "Scientific Research Institute of Synthetic Rubber"
Cand. Sci. (Chem.), acting head of department, solution polymerization laboratory, Mendeleev street, 3«B» Voronezh, 394014, Russia
O. V. Karmanova
Voronezh State University of Engineering Technologies
Dr. Sci. (Engin.), head of department, technology of organic compounds, polymer processing and technosphere safety department, Revolution Av. 19, Voronezh, 394036, Russia
A. S. Lynova
Production and Service Company “BIOSINTEZ” LLC
Cand. Sci. (Engin.), chief specialist of R&D center, Leninsky Av., 2, Voronezh, 394014, Russia
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Review
For citations:
Firsova A.V., Kharitonov A.G., Karmanova O.V., Lynova A.S. Functionalized styrene-butadiene copolymers based on improved metal-alcoholate systems. Proceedings of the Voronezh State University of Engineering Technologies. 2021;83(4):302-307. (In Russ.) https://doi.org/10.20914/2310-1202-2021-4-302-307
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