F-KCW-Department Publications

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Author: search.filters.author.Chitra SSubject: search.filters.subject.XRD

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    POLYAMIDOAMINOEPICHLOROHYDRIN RESIN A NOVEL SYNTHETIC ANTI-CORROSIVE WATER SOLUBLE POLYMER FOR MILD STEEL
    (Elsevier, 2017-08) NirmalaDevi G; Saranya J; Manjubaashini N; DanielThangadurai T; MohanaRoopan S; Chitra S
    A novel polyamidoaminoepichlorohydrin resin was prepared and analyzed using spectroscopy techniques and its anti-corrosion properties were studied and observed. Inhibition efficiency was calculated by impedance spectroscopy, loss in weight and potentiodynamic polarization. Authors inferred results as the inhibitors tested differently are acted as better anti-corrosive agent. The thermodynamic data of activation were determined. The adsorption of resin on the steel surface was calculated according to Langmuir adsorption theory. A surface study was performed using SEM, AFM, FT-IR and XRD. Inhibition mechanism was deduced from concentration and temperature dependence of inhibition efficiency, Langmuir adsorption, SEM and AFM results
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    SYNTHESIS AND CHARACTERIZATION OF DEXTRIN-BASED POLYMER ELECTROLYTES FOR POTENTIAL APPLICATIONS IN ENERGY STORAGE DEVICES
    (Springer, 2017-05-21) Nirmala Devi G; Chitra S; Selvasekarapandian, S; Premalatha M; Monisha S; Saranya J
    An attempt has been made to synthesise a new proton conducting polymer electrolyte using the biopolymer dextrin doped with ammonium thiocyanate salts using solution casting technique. The complexation has been studied using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The differential scanning calorimetry (DSC) thermograms of dextrin with NH4SCN showed that Tg value increases with respect to the increase of NH4SCN concentration. The electrical conductivity was measured using AC impedance analyser which showed that ionic conductivity increases with increase in salt concentration up to 40%. Transference number measurement was carried out to investigate the nature of the charge transport species in the polymer electrolyte. Surface morphology of the electrolytes was determined using scanning electron microscope (SEM) studies, and the chemical composition of the elements present was determined using EDAX. The proton battery was constructed with the highest conducting polymer electrolyte Dex-40%NH4SCN and its open circuit voltage with load were carried out.
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    POTENTIAL APPLICATION OF POLYMER – CLAY COMPOSITE AS CORROSION INHIBITOR FOR LOW CARBON STEEL IN ACIDIC MEDIA
    (Chemical Science Review and Letters, 2014) Kiruthika A; Sounthari P; Parameswari K; Chitra S
    A novel polymer – MMT composite has been prepared and evaluated as excellent corrosion inhibitor for mild steel by gravimetric and electrochemical studies. The prepared composite and the polymer were subjected to thermal and spectral studies. The X-ray diffraction result for polymer - MMT composite showed the intercalation of polymer between the clay layers. The FT-IR result shows the successful incorporation of MMT clay in the polymer. The inhibitors obey Langmuir isotherm indicating that inhibition occurs via adsorption of a monolayer on the mild steel surface. Thermodynamic and kinetic parameters have been evaluated.
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    POLYESTER CLAY COMPOSITE: PREPARATION AND CHARACTERIZATION
    (Research and Reviews, 2014-06) Kiruthika A; Sounthari E; Parameswari K; Chitra S
    In the field of nanotechnology, polymer matrix based nano composites have become a prominent area of current research and development. By inserting the nanometric inorganic compounds, the properties of polymers improve and hence this has a lot of applications depending upon the inorganic material present in the polymers. Synergistic improvements in the composite properties were achieved and are superior to those of the individual components. Keeping this view in mind, we have synthesized novel polyester - MMT Clay composite. The polymer has been synthesized by condensation of a synthesized diol with diacid chloride. The synthesized polymers and composites were characterized by infrared spectra, proton magnetic spectra, scanning electron microscope, thermogravimetry and X-ray diffraction analysis. The results indicate that silicate layers are intercalated in the polyester matrix. The polymer composite is found to be crystalline and dense. The thermal stability of the novel hybrid material is higher compared to that of polymer