Vol. 80 No. 1 (2021)
RUBBERS (CAOUTCHOUC)

EFFECT OF ELECTRON DONOR ADDITIVES AND POLYMERIZATION CONDITIONS ON THE GLASS TRANSITION TEMPERATURE OF SOLUTION STYRENE-BUTADIENE RUBBERS

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  • A. Rumyantseva,
  • D. Burenina,
  • R. Pirogov
A. Rumyantseva
JSC «Voronezhsinthezkauchuk», Сenter of Elastomers
D. Burenina
JSC «Voronezhsinthezkauchuk», Сenter of Elastomers
R. Pirogov
JSC «Voronezhsinthezkauchuk», Сenter of Elastomers
DOI: https://doi.org/10.47664/0022-9466-2021-80-1-10-15

Published 2021-12-20

Keywords

  • styrene-butadiene rubber,
  • electronodonor additives,
  • glass transition temperature,
  • copolymerization process

How to Cite

[1]
Rumyantseva А., Burenina Д. and Pirogov Р. 2021. EFFECT OF ELECTRON DONOR ADDITIVES AND POLYMERIZATION CONDITIONS ON THE GLASS TRANSITION TEMPERATURE OF SOLUTION STYRENE-BUTADIENE RUBBERS. Kauchuk i Rezina. 80, 1 (Dec. 2021), 10–15. DOI:https://doi.org/10.47664/0022-9466-2021-80-1-10-15.

Copyright (c) 2021 Kauchuk i Rezina

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

The studies on the microstructure (M) and glass transition temperature (Tg) of styrene-butadiene rubbers with an increased content of vinyl units, obtained by using various types of electronodonor additives (ED) are present..Selected ED: tetramethylethylenediamine (TMEDA), ditetrahydrofurfurylpropane (DTHFP) and dimethyl ether diethylene glycol (DIGLIM) were tested in the polymerization process (P) by evaluating the conversion of butadiene and styrene during copolymerization. The dependence of the polymerization rate (v), М and Tg on the temperature Т (50–60 and 65–75 °С), type P, and the amount of ED was determined. According to the influence on v, the selected EDs can be arranged in the following order: DTHFP> DIGLIM> TMEDA. It was found out that the glass transition temperature depends not only on the microstructure of the polymer, but also on the conformational rigidity of the polymer chains, which, in turn, depends on the kinetics of the copolymerization process. The results of these studies opened up the prospect of further development of SSBRs based on application of TMEDA, which can bring closer to the greatest extent the rate constants for the addition of styrene and butadiene monomer units to a growing polymer chain.

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