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7019574 
Journal Article 
Interfacial oxidative polymerization of aniline on silica gel's surface 
Mezhuev, YO; Vorobev, IYu; Vagramyan, TA; Abrashov, AA; Tsatsakis, AM; Shtilman, M; Korshak, Yu; Motyakin, M; Plyushchii, I; Alekperov, RA; Luss, AL; Kovarskii, AL; Degtyarev, YeN; Ionova, IS; Dyatlov, VA; , 
2020 
1 
Polymer
ISSN: 0032-3861 
ELSEVIER SCI LTD 
OXFORD 
203 
1 
English 
WOS:000569404800002 
Kinetics of the oxidative polymerization of aniline in toluene induced by manganese (IV) oxide deposited on the surface of silica gel was studied using ESR spectroscopy. The initial rate of an interfacial process decreases rapidly, and then polymerization proceeds as pseudo-first order reaction for the surface concentration of manganese (IV) oxide with an activation energy of 23 kJ x mol(-1). A low activation energy indicates that the overall rate is controlled by aniline diffusion into the reaction zone.The specific surfaces and the distribution of pore volume by radii of the silica gel samples before and after the deposition of manganese (IV) oxide on its surface, as well as after oxidative polymerization of aniline were determined. Oxidative polymerization of aniline causes a shift in the pore volume distribution along the radii to the region of larger pore radii, which indicates the predominant filling of pores of small diameter with polyaniline. 
Polyaniline; Oxidative polymerization; Interfacial polymerization