Rheological Characterization of Carbopol® Dispersions in Water and in Water/Glycerol Solutions
Department of Mechanical Engineering, Pontifícia Universidade Católica-RJ, Rua Marquês de São Vicente 225, Rio de Janeiro, RJ 22453-900, Brazil
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Fluids 2019, 4(1), 3; https://doi.org/10.3390/fluids4010003
Received: 15 December 2018 / Revised: 27 December 2018 / Accepted: 2 January 2019 / Published: 4 January 2019
(This article belongs to the Special Issue Advances in Experimental and Computational Rheology)
The influence of the solvent type on the rheological properties of Carbopol NF 980 dispersions in water and in water/glycerol solutions is investigated. The material formulation, preparation procedure, common experimental challenges and artifact sources are all addressed. Transient and steady-state experiments were performed. For both solvent types, a clearly thixotropic behavior occurs slightly above the yield stress, where the avalanche effect is observed. For larger stresses, thixotropy is always negligible. Among other findings, it is observed that, for a given Carbopol concentration, the dispersion in the more viscous solvent possesses a lower yield stress and moduli, a larger power-law index, and a longer time to reach steady state.
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Keywords:
Carbopol; yield stress; thixotropy
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MDPI and ACS Style
R. Varges, P.; M. Costa, C.; S. Fonseca, B.; F. Naccache, M.; De Souza Mendes, P.R. Rheological Characterization of Carbopol® Dispersions in Water and in Water/Glycerol Solutions. Fluids 2019, 4, 3. https://doi.org/10.3390/fluids4010003
AMA Style
R. Varges P, M. Costa C, S. Fonseca B, F. Naccache M, De Souza Mendes PR. Rheological Characterization of Carbopol® Dispersions in Water and in Water/Glycerol Solutions. Fluids. 2019; 4(1):3. https://doi.org/10.3390/fluids4010003
Chicago/Turabian StyleR. Varges, Priscilla; M. Costa, Camila; S. Fonseca, Bruno; F. Naccache, Mônica; De Souza Mendes, Paulo R. 2019. "Rheological Characterization of Carbopol® Dispersions in Water and in Water/Glycerol Solutions" Fluids 4, no. 1: 3. https://doi.org/10.3390/fluids4010003
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