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- W149720120 abstract "The main characteristics of Poly(vinyl alcohol) (P/A) are its serni-crystalline character despite its lack of stereoregularity and a strong tendency to exhibit both inter and intra-molecular hydrogen bonds. PVA hydrogels obtained by freeze/thaw technique are complex porous systems, whose properties depend on several distinct phenornena that may occur during gelation. The aim of this work was to obtain a better understanding of the influence of crystallinity, hydrogen bonds and phase separation on gel formation and rheological behaviour of PVA hydrogels. Our results indicate that the PVA chains and solvent molecules are organized at different hierarchical scales. The structure of PVA hydrogels is formed during the first freeze/thaw cycle. Consecutive freeze/thaw cycles improve and stabilize this structure. The physical and mechanical properties of these gels are affected by aging. A drying/re hydration protocol is proposed to keep the physical properties of the as-prepared PVA hydrogels." @default.
- W149720120 created "2016-06-24" @default.
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- W149720120 date "2004-01-01" @default.
- W149720120 modified "2023-09-24" @default.
- W149720120 title "Structure and properties of poly (vinyl alcohol) hidrogels obtained by freeze/thaw technique" @default.
- W149720120 hasPublicationYear "2004" @default.
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