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1. Biondo, Matheus Moraes; http://lattes.cnpq.br/9529264326603601. Chemically synthesized poly(o-methoxyaniline): influence of counterions on the structural and electrical properties.

Degree: 2019, Universidade Federal do Amazonas

Poli(o-metoxianilinas) (POMA) foram sintetizadas quimicamente usando diferentes ?cidos dopantes para obter os pol?meros POMA/HCl, POMA/HNO3, POMA/H2SO4 e POMA/H3PO4. A natureza e o tamanho dos contra-?ons influenciaram consideravelmente nas propriedades estruturais, morfol?gicas, t?rmicas e el?tricas dos pol?meros sintetizados. Os padr?es de difra??o de raios X (DRX) apresentaram deslocamentos de pico de acordo com o ?cido dopante, influenciando nos par?metros da rede especialmente ao longo da dire??o [010]. Os pol?meros POMA/HCl, POMA/HNO3 e POMA/H2SO4 apresentaram percentuais semelhantes de cristalinidade (em torno de 50 %), enquanto o pol?mero POMA/H3PO4 foi o menos cristalino (em torno de 40 %). A morfologia polim?rica foi dependente do ?cido dopante, e multimorfologias foram observadas nos pol?meros POMA/HCl, POMA/HNO3, POMA/H2SO4 e POMA/H3PO4. Consider?vel influ?ncia do contra-?on proveniente do ?cido dopante foi constatada nas propriedades el?tricas. A varia??o total obtida na condutividade DC foi de cinco ordens de magnitude. Os valores calculados foram 6,6 x 10-1 S/cm, 1,11 x 10-2 S/cm, 3,64 x 10-3 S/cm e 5,2 x 10-4 S/cm para POMA/HCl, POMA/HNO3, POMA/H2SO4 e POMA/H3PO4, respectivamente. O uso de HCl como dopante potencializou a condutividade el?trica do material polim?rico.

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 was the less crystalline (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. The total variation obtained in DC conductivity was five orders of magnitude. The calculated values were 6.6 x 10-1 S/cm, 1.11 x 10-2 S/cm, 3.64 x 10-3 S/cm and 5.2 x 10-4 S/cm for POMA/HCl, POMA/HNO3, POMA/H2SO4 and POMA/H3PO4, respectively. The use of HCl as dopant potentiated the DC conductivity of the polymeric material.c

Advisors/Committee Members: Sanches, Edgar Aparecido, http://lattes.cnpq.br/9217911214522756, Aguilera Dom?nguez, Lianet, http://lattes.cnpq.br/9259625561946047, Paula, Marcos Marques da Silva, http://lattes.cnpq.br/9465127865782783.

Subjects/Keywords: Poli(o-metoxianilina); Condutividade el?trica; Pol?meros; ENGENHARIAS: ENGENHARIA DE MATERIAIS E METAL?RGICA; Poli(o-metoxianilina); M?todo Le Bail; Condutividade el?trica; Transportadores de carga

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APA (6th Edition):

Biondo, M. M. h. c. b. (2019). Chemically synthesized poly(o-methoxyaniline): influence of counterions on the structural and electrical properties. (Masters Thesis). Universidade Federal do Amazonas. Retrieved from https://tede.ufam.edu.br/handle/tede/7661

Chicago Manual of Style (16th Edition):

Biondo, Matheus Moraes; http://lattes cnpq br/9529264326603601. “Chemically synthesized poly(o-methoxyaniline): influence of counterions on the structural and electrical properties.” 2019. Masters Thesis, Universidade Federal do Amazonas. Accessed November 26, 2020. https://tede.ufam.edu.br/handle/tede/7661.

MLA Handbook (7th Edition):

Biondo, Matheus Moraes; http://lattes cnpq br/9529264326603601. “Chemically synthesized poly(o-methoxyaniline): influence of counterions on the structural and electrical properties.” 2019. Web. 26 Nov 2020.

Vancouver:

Biondo MMhcb. Chemically synthesized poly(o-methoxyaniline): influence of counterions on the structural and electrical properties. [Internet] [Masters thesis]. Universidade Federal do Amazonas; 2019. [cited 2020 Nov 26]. Available from: https://tede.ufam.edu.br/handle/tede/7661.

Council of Science Editors:

Biondo MMhcb. Chemically synthesized poly(o-methoxyaniline): influence of counterions on the structural and electrical properties. [Masters Thesis]. Universidade Federal do Amazonas; 2019. Available from: https://tede.ufam.edu.br/handle/tede/7661

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