02324nas a2200265   4500008004100000022001400041245013400055210006900189260007300258300001200331490000800343520134700351653001901698653002301717653001401740653002401754653002101778653002201799653002601821100002201847700002501869700002201894700001601916856012601932       2007                        eng d  a0378-775300aHigh-temperature, polymer-graphite hybrid composites for bipolar plates: effect of processing conditions on electrical properties0 aHightemperature polymergraphite hybrid composites for bipolar pl  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a702-7070 v1633 a<p>High-temperature thermoplastic-graphite composites are prepared using polyphenylene sulfide (PPS) and polyether sulfone (PES) containing natural graphite powder. All samples are prepared by high pressure compaction and heating to high temperatures. The effect of a third additional conducting component on the electrical resistance of these composites is studied. A low resistance of the order of 0.1 Omega can be obtained even for a graphite concentration of 50% by addition of the third component. The effect of a mixing/blending technique on the anisotropy of conductivity is investigated. Solution blending of PES with graphite leads to lower anisotropy values than powder mixing and compression moulding. The samples when exposed continuously to a working temperature of 100 degrees C give a small but significant reduction in electrical resistance. X-ray diffraction studies on composites prepared by different techniques indicate that there is restructuring and crystallite re-orientation of the graphite phase in the samples. A large reduction in the crystallite size is observed for samples prepared by solution blending while re-orientation occurs after heat treatment. The changes in electrical properties can be correlated with these structural transformations in the composites. (c) 2006 Elsevier B.V. All rights reserved.</p>10abipolar plates10aconducting polymer10afuel cell10agraphite composites10ahybrid materials10apolyether sulfone10apolypherylene sulfide1 aRadhakrishnan, S.1 aRamanujam, B., T. S.1 aAdhikari, Arindam1 aSivaram, S.  uhttps://library.ncl.res.in/content/high-temperature-polymer-graphite-hybrid-composites-bipolar-plates-effect-processing-001863nas a2200241   4500008004100000022001400041245012200055210006900177260007600246300001200322490000800334520098100342653002001323653002301343653001101366653002101377653001701398653001601415653001401431100002201445700002201467856013201489       2011                        eng d  a0021-899500aDopant induced effect on electrocatalytic reduction of nitrobenzene using conducting polypyrrole thin film electrodes0 aDopant induced effect on electrocatalytic reduction of nitrobenz  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAPR  a719-7240 v1203 a<p>Conducting polypyrrole electrodes were prepared by electrochemical polymerization of pyrrole on vacuum-metallized glass substrates. These electrodes were modified by doping with a range of metal halides as dopant ions having different electronegativity. Electrochemical reduction of nitrobenzene using these electrodes was studied by means of cyclic voltammetry technique in acetonitrile medium containing aqueous HClO(4) (0.1M) as supporting electrolyte. It was found that the electronegativity of the dopant ion played a very important role in the electrocatalytic activity. Polypyrrole doped with nickel chloride gave the highest anodic current at the reduction potential of nitrobenzene. The results were explained on the basis of charge transfer efficiency at the electrode-electrolyte interface, which was associated with the acceptor state created by the dopant in the semi-conducting polymer. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 719-724, 2011</p>10acharge transfer10aconducting polymer10aDoping10aelectrocatalysis10anitrobenzene10apolypyrrole10areduction1 aAdhikari, Arindam1 aRadhakrishnan, S.  uhttps://library.ncl.res.in/content/dopant-induced-effect-electrocatalytic-reduction-nitrobenzene-using-conducting-polypyrrole-0