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Oct 06, 2014Open Access
The use of polyamide coatings for electrical
applications is restricted mainly because of its inadequate flame retardant
behaviour. In order to improve its flame retardant behaviour, polyamide is
modified by incorporating phosphorus moiety in its backbone. The structure of
the phosphorus and poly amide was confirmed by infrared spectroscopy (FT-IR),
NMR, thermo gravimetric analysis (TGA), differential scanning calorimetry
(DSC), UL-94 vertical burning tests and char residue tests. From the resul...
Sep 23, 2014Open Access
The present work reports the oxidative synthesis of poly aniline using K2Cr2O7 as an oxidizing agent and H2SO4 as dopant. The
synthesized polymer was characterized by solubility test and UV- visible spectroscopic
technique. The synthesized polymer (poly aniline) was insoluble in ethanol,
acetone, benzene and water. The absorbance of UV-visible spectra shows two
reductive peaks at some wake length. The band ob ...
Sep 22, 2014Open Access
The PANI-PVA composite films adopting PVA as the base material and doped
with hydrochloride, DBSA, amino sulfonic acid aqueous solution were prepared
and their conductivity was compared. Among these PANI-PVA composite films, the
conductivity of HCl-PANI-PVA film is the highest. At the same time, the influences
of mass ratio between PANI and PVA, acid content, oxidant content, reaction
time and drying temperature of film on the conductivity of HCl-PANI-PVA film
we ...
Jun 23, 2014Open Access
We
report ab initio studies of the
dipole polarizabilities (α) and first
static hyperpolarizabilities (β) for
a set of substituted hexatriene in which electron donating (D) and electron
accepting (A) groups were introduced either end parts of the hexatriene chain
NO2-(CH=CH)3-D. Geometries of all molecules were
optimized at the Hartree-Fock HF/6-311 G(2d,p) level of theory.
Polarizabilities of these molecules w ...
Jun 20, 2014Open Access
Qingshan Thermoelectric Plant located in Wuhan City,
Hubei Province, China, and it uses coal as a fuel. Coal combustion generates
not only gaseous pollutants like SO2 and NOx but also toxic and heavy metals to
the atmosphere. From the environmental point of view, the determination and
speciation of trace toxic and heavy metals released from coal combustion are
very important. In this work, the atomic spectroscopic methods for
determination of so ...
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