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Thermal analysis: an effective characterization method of polyvinyl acetate films applied in corrosion inhibition field

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Abstract

To prepare a commercial product with economic and technical relevance, polyvinyl acetate (PVAc) was synthesized, under our laboratory conditions, updating an industrial prescription by emulsion polymerization of vinyl acetate using polyvinyl alcohol as emulsifier, Fenton reagent as reaction initiator and acetic acid as aqueous phase pH-regulator. A polymeric film (PSYF) was made and comparatively characterized with a standard PVAc film (PSTF) by scanning electron microscopy with energy-dispersive X-ray spectroscopy, Raman spectroscopy and simultaneous thermogravimetry and derivative thermogravimetry analysis. Similar vibration bands for PSTF and PSYF in the Raman spectra were identified which accurately reproduce the values reported in the literature. Thermal analysis was an efficient method to detect the compositional differences between the two polymeric films, precisely indicating that PSYF contained 92% PVAc and a mixture of 8% containing unreacted monomer, polyvinyl alcohol and humidity. Additionally, the PVAc film inhibitive properties on carbon steel corrosion in acid environments were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. A high inhibition efficiency of PVAc, ranging between 86.0 and 88.0%, was computed from electrochemical measurements, indicating the polymer adsorption ability on carbon steel surface.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Sciences, University of Craiova, 107i Calea Bucureşti, Craiova, Romania

    Adriana Samide, Bogdan Tutunaru, Claudia Merişanu & Nicoleta Cioateră

  2. Faculty of Sciences, Doctoral School of Sciences, University of Craiova, A.I. Cuza No.13, Craiova, Romania

    Claudia Merişanu

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  1. Adriana Samide
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  2. Bogdan Tutunaru
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  4. Nicoleta Cioateră
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Correspondence to Bogdan Tutunaru.

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Samide, A., Tutunaru, B., Merişanu, C. et al. Thermal analysis: an effective characterization method of polyvinyl acetate films applied in corrosion inhibition field. J Therm Anal Calorim 142, 1825–1834 (2020). https://doi.org/10.1007/s10973-020-09489-y

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  • DOI: https://doi.org/10.1007/s10973-020-09489-y

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