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Rheological investigation of poly(vinyl alcohol)/poly(N-vinyl pyrrolidone) mixtures in aqueous solution and hydrogel state

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Abstract

Rheological behavior of poly(vinyl alcohol) (PVA) and poly(N-vinyl pyrrolidone) (PVP) mixtures in aqueous solutions and hydrogel state was investigated. The complex dependence of the viscosity on PVA/PVP mixture composition could be attributed to cumulative effects of electrostatic interactions, hydrogen bonding or association phenomena. Physical hydrogels were prepared by freezing/thawing method and their viscoelastic properties were followed as a function of number of cryogenic cycles and aging time at 37 °C. From swelling experiments, it was observed that the diffusion of water molecules into the hydrogel pores is Fickian (for low number of cryogenic cycles) and it becomes pseudo-Fickian as the sample is submitted to more than 10 freezing/thawing cycles. PVA/PVP hydrogels obtained by physical interactions present a high degree of tailorability and they are suitable candidates for biomedical applications.

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Acknowledgments

This work was supported by a grant of the Romanian National Authority for Scientific Research, CNCS-UEFISCDI, project number PN-II-ID-PCE-2011-3-0199 (contract 300/2011). The authors thank to Adrian Bele from “Petru Poni” Institute of Macromolecular Chemistry for dynamic water vapor sorption measurements.

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Authors and Affiliations

  1. “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487, Iasi, Romania

    Maria Bercea, Simona Morariu & Mirela Teodorescu

Authors
  1. Maria Bercea
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  2. Simona Morariu
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  3. Mirela Teodorescu
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Correspondence to Maria Bercea.

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Paper dedicated to the 150th anniversary of the Romanian Academy

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Bercea, M., Morariu, S. & Teodorescu, M. Rheological investigation of poly(vinyl alcohol)/poly(N-vinyl pyrrolidone) mixtures in aqueous solution and hydrogel state. J Polym Res 23, 142 (2016). https://doi.org/10.1007/s10965-016-1040-3

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  • DOI: https://doi.org/10.1007/s10965-016-1040-3

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