Obtenção e caracterização de compósitos de polipropileno e muscovita ultrassônica
Obtaining and characterizing polypropylene and ultrasonicated muscovite composites
Fábio Rezende de Souza; Elaine Vidal Dias Gomes Libano; Silvia Cristina Alves França; Shirleny Fontes Santo
Resumo
Neste trabalho foram preparados compósitos utilizando polipropileno (PP) como matriz e muscovita ultrassonicada como carga. O tratamento de ultrassonicação da muscovita promove delaminação do mineral o que contribui para aumento da adesão polímero/mineral. O mineral muscovita, que é um subtipo de mica, foi tratado ultrassonicamente por 60 e 120 minutos. As amostras PP/Mica foram processadas em extrusora monorosca, seguido de moagem e conformação em filmes planos. A caracterização dos compósitos quanto a densidade exibiu aumento da propriedade com aumento do tempo de tratamento ultrassônico da mica, o que sugere melhoria da interação com o polímero. O MEV dos compósitos revelou uma distribuição mais homogênea e maior alinhamento do mineral para as amostras tratadas ultrassonicamente. Os compósitos foram caracterizados ainda quanto ao impacto IZOD, FTIR e DRX. A análise geral dos resultados evidencia que os compósitos obtidos com muscovita ultrassonicada apresentaram discreta melhoria de propriedades.
Palavras-chave
Abstract
In this work, composites were prepared using polypropylene (PP) as matrix and ultrasonicated muscovite as filler. The ultrasonication treatment of muscovite promotes delamination of the mineral, which contributes to increased polymer/ mineral adhesion. The muscovite mineral, which is a subtype of mica, was ultrasonically treated for 60 and 120 minutes. The PP/Mica samples were processed in a single-screw extruder, followed by grinding and forming into flat films. The density characterization of the composites showed an increase in the property with an increase in the ultrasonic treatment time of the mica, which suggests an improvement in the interaction with the polymer. The SEM of the composites revealed a better distribution and greater alignment of the mineral for the ultrasonically treated samples. The compounds were further characterized in terms of IZOD impact, FTIR and XRD. The general analysis of the results shows that the composites obtained with ultrasonicated muscovite presented a slight improvement in properties.
Keywords
Referências
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Submetido em:
08/07/2024
Aceito em:
12/02/2025
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