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Thermal and Chemical Characterization of Polyaniline/ Polypyrrole Copolymers

Beaucage, Catherine
http://orcid.org/0000-0002-8545-8808
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649762996350122

Abstract Details

2022, MS, University of Cincinnati, Engineering and Applied Science: Materials Science.
Conducting polymers have multiple applications, such as for corrosion protection and anti-static coatings. Studied across disciplines, conducting polymers continue to be an advantageous alternative to their metal counterparts given their flexibility, low density, and tunable electronic properties. Polyaniline (PANi) and polypyrrole (PPy) have good conductivity but can be difficult to use individually due to poor solubility, fusibility, and processability. Samples with four PANi to PPy ratios and dopants were characterized to determine if, when combined, the material is more soluble, fusible, and processable. Thermal degradation of the materials was measured using a thermogravimetric analyzer (TGA) and a differential scanning calorimeter (DSC). Activation energy for material changes, such as dopant loss and polymer degradation, was found by analyzing TGA results using the Kissinger method. The DSC data were used to determine degradation rate, glass transition temperature, and melting temperature. Chemical properties were determined using ultraviolet–visible (UV-Vis) spectroscopy and Fourier-Transform Infrared (FTIR) spectroscopy. Three Uv-Vis bands were observed in the PANi/PPy samples and the absorbance ratios of the materials were all around 0.04, indicating that they are alternating copolymers. FTIR spectroscopy was used to determine the chemical structure of the material, as well as conjugation length and degree of oxidation of PANi, using the benzenoid/ quinoid ratios. Based on the combination of 1250 cm-1 and 1100 cm-1 bands from FTIR spectra, it was determined that most of the samples were copolymers. The DSC cooling curves showed that all samples except the 40/60 PANi/PPy sample were amorphous copolymers. The strong crystallization peak around 100 oC suggests the 40/60 PANi/PPy sample was a semi-crystalline copolymer. All PANi/PPy samples show promise to improve processability and thermal stability.
Jude Iroh, Ph.D. (Committee Member)
Mark Schulz, Ph.D. (Committee Member)
Yoonjee Park, Ph.D. (Committee Member)
104 p.
Materials Science
Polyaniline/Polypyrrole; Charictarization; TGA; DSC; Uv-Vis Spectrosscopy; FTIR

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Citations

  • Beaucage, C. (2022). Thermal and Chemical Characterization of Polyaniline/ Polypyrrole Copolymers [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649762996350122

    APA Style (7th edition)

  • Beaucage, Catherine. Thermal and Chemical Characterization of Polyaniline/ Polypyrrole Copolymers. 2022. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649762996350122.

    MLA Style (8th edition)

  • Beaucage, Catherine. "Thermal and Chemical Characterization of Polyaniline/ Polypyrrole Copolymers." Master's thesis, University of Cincinnati, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1649762996350122

    Chicago Manual of Style (17th edition)

ucin1649762996350122
244
© 2021, some rights reserved.Creative Commons License Thermal and Chemical Characterization of Polyaniline/ Polypyrrole Copolymers by Catherine Beaucage is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.