jp311898v_si_001.pdf (81.42 kB)
Deep Impact of the Template on Molecular Weight, Structure, and Oxidation State of the Formed Polyaniline
journal contribution
posted on 2013-05-02, 00:00 authored by Nikolay A. Ogurtsov, Yuriy
V. Noskov, Kateryna
Yu. Fatyeyeva, Vladimir G. Ilyin, Galina V. Dudarenko, Alexander A. PudIn
this work we find that polyaniline (PANI), synthesized by aniline
chemical polymerization at a surface of template polycarbonate (PC)
particles, is significantly different in molecular weight, structural
order, oxidation state, and conductivity from a neat PANI. Molecular
weight of the PANI phase in the composite (Mw = 158 000) is 1.6 times higher than that of the neat
PANI synthesized in the absence of the template particles. Moreover,
XRD analysis shows that crystallinity of the PANI phase in the composite
is three times higher than that of the neat PANI. Raman spectroscopy
indicates that the oxidation level of PANI in the PC/PANI composite
is lower than that of the neat PANI. These noticeable changes of the
PANI phase properties suggest specific interactions of reagents in
the polymerization medium and formed PANI with the template phase
as well as an orientation effect of the latter surface. FTIR spectroscopy
reveals that hydrogen bonding in the neat doped PANI is weaker than
one between −NH– of PANI and CO of PC at their
interface. The discovered differences are supported by the fact that
conductivity of the PANI phase in the composite is more than three
times higher than that of the neat PANI.