Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.2178
Polímeros: Ciência e Tecnologia
Scientific & Technical Article

Rheological behavior of acrylic paint blends based on polyaniline

Sirqueira, Alex da Silva; Teodoro Júnior, Dermeval; Coutinho, Marcio da Silva; Silva Neto, Artur Soares da; Silva, Adriana dos Anjos; Soares, Bluma Guenther

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Abstract

The rheological properties of acrylic paints and polyaniline (PAni) blends, with different contents of PAni doped by dodecyl benzene sulphonic acid (DBSA) and, dispersed by mechanical stirrer and ultrasonic, were investigated by controlled shear rate testing ramps. The results showed that the commercial acrylic paint had tended to deliver the required stability on the blends, in order to avoid sedimentation process. All samples exhibited non-Newtonian flow behavior (shear thinning), increasing PAni content the flow behavior index (n) decreased (0.41 to 0.11) and power law model were used to fitted the experimental curves. The results showed that the addition of PAni-DBSA affects the viscoelastic behavior of the mixtures due to the interactions between the components in the mixture. The best properties were obtained for samples 90/10 wt % dispersed by ultrasonic, indicating the feasibility of the usage as a conducting paint.

Keywords

polyaniline, acrylic paint, thixotropy.

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