Chemically synthesized poly(o-methoxyaniline): Influence of counterions on the structural and electrical properties
| Autor: | Edgar A. Sanches, Suzan X. Lima, Adriano de Souza Carolino, Ana L. F. Rocha, Virginia Mansanares Giacon, Pedro Henrique Campelo, Larissa Medeiros de Oliveira, Matheus Moraes Biondo, Yurimiler Leyet Ruiz, Juliana Pereira da Silva |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Dopant 010405 organic chemistry Organic Chemistry Doping Analytical chemistry Polymer Le Bail method 010402 general chemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Inorganic Chemistry Crystallinity chemistry Electrical resistivity and conductivity Charge carrier Counterion Spectroscopy |
| Zdroj: | Journal of Molecular Structure. 1205:127588 |
| ISSN: | 0022-2860 |
| Popis: | Poly(o-methoxyanilines) (POMA) were chemically synthesized using different dopant acids to obtain the polymers POMA/HCl, POMA/HNO3, POMA/H2SO4 and POMA/H3PO4. The nature and size of the counterions influenced considerably on the structural, morphological, thermal and electrical properties of the as-synthesized polymers. X-ray Diffraction (XRD) patterns presented slightly peak displacements according to the dopant acid, influencing the lattice parameters specially along [010]. The polymers POMA/HCl, POMA/HNO3 and POMA/H2SO4 presented similar percentage of crystallinity (around 50%), while the polymer POMA/H3PO4 presented de lower crystallinity (around 40%). Polymer morphology was dependent on the dopant acid, besides multimorphologies were observed in the polymers POMA/HCl, POMA/HNO3 and POMA/H3PO4. A great counterion influence from the doping acid was found in the electrical properties of the material. The total variation obtained in DC conductivity was five orders of magnitude. The calculated values were 6.6 × 10−1 S/cm, 1.11 × 10−2 S/cm, 3.64 × 10−3 S/cm, 5.2 × 10−4 S/cm for POMA/HCl, POMA/HNO3, POMA/H2SO4 and POMA/H3PO4, respectively. The use of HCl as a dopant potentiated the DC conductivity of the polymeric material. |
| Databáze: | OpenAIRE |
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