Fujii, S. and Burchell, M.J. and Armes, S.P. and Jeans, R. and Devonshire, R. and Warren, S. and McArthur, S.L. and Postberg, F. and Srama, R. (2006) Synthesis and characterization of polypyrrole-coated sulfur-rich latex particles: New synthetic mimics for sulfur-based micrometeorites. Chemistry of Materials, 18 (11). pp. 2758-2765.
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Polypyrrole (PPy) has been deposited from aqueous solution onto submicrometer-sized sulfur-rich poly[bis(4-vinylthiophenyl)sulfide] (PMPV) latex particles. The PMPV seed particles and resulting composite particles were extensively characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, FT-IR spectroscopy, helium pycnometry, Raman spectroscopy, and electrical conductivity measurements. Four-point probe measurements on pressed pellets indicate conductivities of around 6 x 10(-5) S cm(-1) for a polypyrrole loading of approximately 11.5%. This suggests a somewhat patchy, nonuniform polypyrrole overlayer, which is consistent with our Raman spectroscopy studies. Despite their relatively low conductivities, these polypyrrole-coated PMPV latexes can be accelerated up to hypervelocities (> 20 km s(-1)) using a high voltage (2 MV) van de Graaf instrument. In view of their high sulfur contents (ca. 28%), these new electrically conductive latexes are expected to be interesting synthetic mimics for understanding the behavior of sulfur-based micrometeorites, whose existence has been postulated by planetary scientists investigating signs of volcanic activity on one of Jupiter's moons (Io).
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||Mark Burchell|
|Date Deposited:||02 Sep 2008 13:00|
|Last Modified:||14 Jan 2010 14:19|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/5048 (The current URI for this page, for reference purposes)|
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