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Colloid and Polymer Science

, Volume 280, Issue 6, pp 509–516 | Cite as

Polypyrrole-coated natural rubber latex by admicellar polymerization

  • Kanchana Bunsomsit
  • Rathanawan Magaraphan
  • Edgar A. O'Rear
  • Brian P. Grady
Original Paper

Abstract.

Admicellar polymerization has been used for the preparation of an electrically conductive polypyrrole coating on latex particles. An anionic surfactant, sodium dodecyl sulfate (SDS), was adsorbed onto natural rubber (NR) latex particles to form the surfactant bilayers after adjusting the pH below the point of zero charge of the latex surface. Adsorption of SDS and pyrrole adsolubilization were determined as a function of pyrrole and sodium chloride concentrations. Pyrrole caused a decrease in SDS adsorption at equilibrium. Sodium chloride increased the surfactant adsorption and the pyrrole adsolubilization. Thermogravimetric results showed the presence of polypyrrole. The conductivity of the polypyrrole-coated NR latex film prepared by admicellar polymerization without salt was the lowest; however, with salt addition, the conductivity of the film improved significantly. The oxidative polymerization technique resulted in a relatively higher conductivity than oxidative admicellar polymerization.

Polypyrrole Natural rubber latex Surfactant Admicellar polymerization Conducting polymer 

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Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • Kanchana Bunsomsit
    • 1
  • Rathanawan Magaraphan
    • 1
  • Edgar A. O'Rear
    • 2
  • Brian P. Grady
    • 2
  1. 1.The Petroleum and Petrochemical College, Chulalongkorn University, Phthumwan, Bangkok 10330, Thailand
  2. 2.Department of Chemical Engineering and Materials Science, University of Oklahoma, Norman, OK 73019, USA

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