Russian Chemical Bulletin

, Volume 48, Issue 3, pp 459–462 | Cite as

Sulfurization of polymers

1. The reaction of polydialkylsiloxanes with elemental sulfur and electrochemical behavior of the products
  • B. A. Trofimov
  • T. A. Skotheim
  • L. V. Andriyankova
  • A. G. Malkina
  • G. F. Myachina
  • S. A. Korzhova
  • T. I. Vakul'skaya
  • I. P. Kovalev
  • Yu. V. Mikhailik
Physical Chemistry
Received:

Abstract

Polydiethylsiloxane reacts with elemental sulfur at 300–320 °C (ZnCl2 slightly accelerates the process) with evolution of hydrogen sulfide and formation of black lustrous paramagnetic powders (sulfur content up to 38.50%), which possess a noticeable electric conductivity (3.20·10−7 S cm−1 when doped with I2) and redox properties. Polydimethylsiloxanes are stable under the same conditions. In rechargeable lithium batteries, the sulfurized polydiethylsiloxane behaves as an active cathode material allowing charging and discharging of the battery. The specific capacities of the cathodic and anodic processes (80–100 (mA h) g−1) change insignificantly. The hydrolytic stability, elemental analysis, IR and ESR spectra, DSC-TGA and derivatographic analyses data, the electric conductivity, and the character of the electrochemical activity of the polymers synthesized indicate that the polymers contain the polyvinylene disulfide blocks cross-linked by the polysiloxane chain.

Key words

polydiethylsiloxane elemental sulfur sulfurization electric conductivity cathodic and anodic processes 
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Copyright information

© Kluwer Academic/Plenum Publishers 1999

Authors and Affiliations

  • B. A. Trofimov
    • 1
  • T. A. Skotheim
    • 2
  • L. V. Andriyankova
    • 1
  • A. G. Malkina
    • 1
  • G. F. Myachina
    • 1
  • S. A. Korzhova
    • 1
  • T. I. Vakul'skaya
    • 1
  • I. P. Kovalev
    • 2
  • Yu. V. Mikhailik
    • 2
  1. 1.Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of SciencesIrkutskRussian Federation
  2. 2.Moltech CorporationTucsonUSA

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