| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312803 |
| ISSN: | 1516-1439 |
| Authors: | Cordeiro, Maria Angela de Moraes1 Cordeiro, Joao Manuel Marques Goncalves, Debora2 Bulhoes, Luis Otavio de Sousa3 |
| Institutions: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Faculdade de Engenharia, Ilha Solteira, Sao Paulo. Brasil 2Universidade de Sao Paulo, Instituto de Fisica, Sao Carlos, Sao Paulo. Brasil 3Universidade Federal de Sao Carlos, Departamento de Quimica, Sao Carlos, Sao Paulo. Brasil |
| Year: | 2005 |
| Season: | Ene-Mar |
| Volumen: | 8 |
| Number: | 1 |
| Pages: | 5-10 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | Poly(o-methylaniline) (poly-o-toluidine, PTOL) was synthesized by chemical oxidation of o-toluidine with ammonium peroxydisulfate in an aqueous 1.0 mol L-1 HCl solution. The progress of polymerization was followed by measuring the open-circuit potential (OCP) of a Pt electrode immersed in the reaction medium with the polymerization time. The chemical synthesis of PTOL was carried out at different monomer:oxidant (M:O) molar ratios (4:1, 2:1, 1.5:1, 1:1, and 0.66:1), and the products obtained were characterized by infrared spectroscopy, gel permeation chromatography, and X-ray diffraction. The molecular weight and percentage of crystallinity of PTOL are higher for samples synthesized in an excess of the monomer, i.e. at higher M:O ratios. However, the yield of PTOL prepared at higher M:O ratios is considerably low, in particular at a 4:1 M:O ratio, which is the M:O ratio most commonly used in the literature to synthesize polyaniline and its derivatives |
| Disciplines: | Ingeniería, Química, Física y astronomía |
| Keyword: | Ingeniería de materiales, Ingeniería electrónica, Química de polímeros, Química industrial, Teoría cinética y plasmas, Conductores, Polimerización, Síntesis química, Electroquímica |
| Keyword: | Engineering, Chemistry, Physics and astronomy, Electronic engineering, Materials engineering, Industrial chemistry, Polymer chemistry, Kinetic theory and plasma, Conductors, Polymerization, Chemical synthesis, Electrochemistry |
| Full text: | Texto completo (Ver HTML) |
