Rheological investigation of poly(vinyl alcohol)/poly(N-vinyl pyrrolidone) mixtures in aqueous solution and hydrogel state
作者： Maria Bercea , Simona Morariu , Mirela Teodorescu
DOI: 10.1007/S10965-016-1040-3
关键词:
摘要: Rheological behavior of poly(vinyl alcohol) (PVA) and poly(N-vinyl pyrrolidone) (PVP) mixtures in aqueous solutions hydrogel state was investigated. The complex dependence the viscosity on PVA/PVP mixture composition could be attributed to cumulative effects electrostatic interactions, hydrogen bonding or association phenomena. Physical hydrogels were prepared by freezing/thawing method their viscoelastic properties followed as a function number cryogenic cycles aging time at 37 °C. From swelling experiments, it observed that diffusion water molecules into pores is Fickian (for low cycles) becomes pseudo-Fickian sample submitted more than 10 cycles. obtained physical interactions present high degree tailorability they are suitable candidates for biomedical applications.
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