Electrically conductive nanocomposites produced by in situ polymerization of pyrrole in pre-vulcanized natural rubber latex

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUSDA-ARS-
Autor(es): dc.creatorSantim, Ricardo Hidalgo-
Autor(es): dc.creatorSanches, Alex Otávio-
Autor(es): dc.creatorda Silva, Michael Jonas-
Autor(es): dc.creatorMcMahan, Colleen Marie-
Autor(es): dc.creatorMalmonge, José Antonio-
Data de aceite: dc.date.accessioned2025-08-21T17:52:59Z-
Data de disponibilização: dc.date.available2025-08-21T17:52:59Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2021-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/pc.26591-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/223641-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/223641-
Descrição: dc.descriptionFlexible conductive polymeric nanocomposites were produced by in situ polymerization of polypyrrole (PPy) in a natural rubber (NR) latex medium. Pre-vulcanized and non-pre-vulcanized NR latex, with varying NR/pyrrole (Py) monomer ratio was studied. The resulting nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, DC electrical conductivity, and mechanical properties. The electrical conductivity increased as the NR/Py ratio decreased reaching a maximum of 1.0 × 10−2 S/cm for a vulcanized nanocomposite with NR/PY = 4 mass ratio. In terms of mechanical properties, it was observed that tensile strength at break (σatbreak) also increased with decreasing of NR/Py mass ratio, and for the same proportion of Py, the nanocomposites obtained from vulcanized latex presented higher strength. SEM analysis revealed that unlike non-pre-vulcanized latex, PPy nanoparticles tend to be distributed in the pre-vulcanized matrix in circumferential patterns, with an average diameter of 1 micron, indicating that the rubber microparticles have been encapsulated by the conductive polymer. This engineered morphological structure has been shown to significantly influence the final properties of the nanocomposites, compared to those prepared from non-vulcanized latex, changing not only the distribution of PPy in the matrix, but also changing the coalescence behavior of NR particles, as well as influencing the percolation threshold.-
Descrição: dc.descriptionFaculdade de Engenharia Universidade Estadual Paulista (UNESP), SP-
Descrição: dc.descriptionFaculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), SP-
Descrição: dc.descriptionWestern Regional Research Center USDA-ARS-
Descrição: dc.descriptionFaculdade de Engenharia Universidade Estadual Paulista (UNESP), SP-
Descrição: dc.descriptionFaculdade de Engenharia e Ciências Universidade Estadual Paulista (UNESP), SP-
Idioma: dc.languageen-
Relação: dc.relationPolymer Composites-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectconductive elastomers-
Palavras-chave: dc.subjectin situ polymerization-
Palavras-chave: dc.subjectnatural rubber latex-
Palavras-chave: dc.subjectpolypyrrole-
Título: dc.titleElectrically conductive nanocomposites produced by in situ polymerization of pyrrole in pre-vulcanized natural rubber latex-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.