Influence of processing parameters on the macroscopic mechanical behavior of PVA hydrogels

Christopher Masri 1 Grégory Chagnon 1 Denis Favier 1
1 TIMC-IMAG-BioMMat - Ingénierie Biomédicale et Mécanique des Matériaux
TIMC-IMAG - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : This paper investigates the influence of three different processing parameters on the global mechanical behavior of PVA (Polyvinyl alcohol)/DMSO (Dimethylsulfoxide) hydrogels: the initial concentration of PVA, the DMSO:H2O ratio and the number of freeze/thaw cycle applied to the material. A specific thermo-regulated testing apparatus for hydrophilic materials is presented, along with the performed cyclic and rupture tests. The observed mechanical responses are explained by an in-depth analysis of the cross-linking phenomenon. Using the Neo-Hookean hyperelastic model, the experimental data is fitted and a link between the density of macro-molecular chains in the material and its mechanical behavior is established. Strong differences are observed and discussed.
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Christopher Masri, Grégory Chagnon, Denis Favier. Influence of processing parameters on the macroscopic mechanical behavior of PVA hydrogels. Materials Science and Engineering: C, Elsevier, 2017, 75, pp.769-776. ⟨10.1016/j.msec.2017.02.045⟩. ⟨hal-01481365⟩

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