Search results for "CrystallizationFreezingGelationNeutron scatteringWater"

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Time-resolving Analysis of Cryotropic Gelation of Water/Poly(Vinyl Alcohol) Solutions via Small Angle Neutron Scattering

2007

The structural transformations occurring in initially homogeneous aqueous solutions of poly(vinyl alcohol) (PVA) through application of freezing (-13 degrees C) and thawing (20 degrees C) cycles is investigated by time resolving small-angle neutron scattering (SANS). These measurements indicate that formation of gels of complex hierarchical structure arises from occurrence of different elementary processes, involving different length and time scales. The fastest process that could be detected by our measurements during the first cryotropic treatment consists of the crystallization of the solvent. However, solvent crystallization is incomplete, and an unfrozen liquid microphase more concentr…

Vinyl alcoholAqueous solutionMaterials scienceCrystallizationFreezingGelationNeutron scatteringWaterNeutron scatteringSmall-angle neutron scatteringSurfaces Coatings and Filmslaw.inventionSolventCrystallographychemistry.chemical_compoundChemical engineeringchemistrylawScientific methodMaterials ChemistryWater of crystallizationPhysical and Theoretical ChemistryCrystallization

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PEPhysical Sciences and Engineering
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LSLife Sciences
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SHSocial Sciences and Humanities
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