Topic
Vinyl alcohol
About: Vinyl alcohol is a research topic. Over the lifetime, 13839 publications have been published within this topic receiving 315464 citations. The topic is also known as: Ethenol & Hydroxyethene.
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TL;DR: In this paper, polyvinyl alcohol (PVA) hydrogels with different degree of hydrolysis (DH) were prepared by chemical crosslinking with glutaraldehyde (GA).
1,226 citations
1,192 citations
TL;DR: In this paper, the authors used FTIR spectroscopy measurements to confirm a high level of hydrogen bonding between polyaniline and the nonionic polymer in the multilayer films.
Abstract: The molecular-level layer-by-layer processing of polyaniline with a variety of different nonionic water soluble polymers has been demonstrated. This new type of layer-by-layer adsorption process is driven by hydrogen-bonding interactions and has been accomplished with poly(vinylpyrrolidone), poly(vinyl alcohol), poly(acrylamide), and poly(ethylene oxide). FTIR spectroscopy measurements confirm a high level of hydrogen bonding between polyaniline and the nonionic polymer in the multilayer films. The effects of solution pH and polymer molecular weight on the deposition process were investigated. Comparisons with polyaniline films assembled via an electrostatic mechanism with sulfonated polystyrene indicate that the nonionic polymers adsorb onto polyaniline with a greater density of loops and tails and form highly interpenetrated bilayers with a high polyaniline content. The conductivities of these self-assembled multilayer films were found to be on the order of 1−4 S/cm for films doped with methane sulfonic...
855 citations
TL;DR: In this paper, a composite structure study revealed a coexistence of exfoliated and intercalated MMT layers, especially for low and moderate silicate loadings, which promoted a new crystalline phase different than the one of the respective neat PVA, characterized by higher melting temperature and a different crystal structure.
Abstract: Poly(vinyl alcohol)/sodium montmorillonite nanocomposites of various compositions were created by casting from a polymer/silicate water suspension. The composite structure study revealed a coexistence of exfoliated and intercalated MMT layers, especially for low and moderate silicate loadings. The inorganic layers promote a new crystalline phase different than the one of the respective neat PVA, characterized by higher melting temperature and a different crystal structure. This new crystal phase reflects on the composite materials properties. Namely, the hybrid polymer/silicate systems have mechanical, thermal, and water vapor transmission properties, which are superior to that of the neat polymer and its conventionally filled composites. For example, for a 5 wt % MMT exfoliated composite, the softening temperature increases by 25 °C and the Young's modulus triples with a decrease of only 20% in toughness, whereas there is also a 60% reduction in the water permeability. Furthermore, due to the nanoscale d...
764 citations
TL;DR: In this article, submicron polyvinyl alcohol (PVA) fiber mats were prepared by electrospinning of aqueous PVA solutions in 6-8% concentration.
746 citations