Results 11 to 20 of about 24,336 (264)
Ferulated Poly(vinyl alcohol) based hydrogels
Heliyon, 2023 New graft copolymers were prepared by reaction of poly (vinyl alcohol) (PVA) with mono-imidazolide or bis-imidazolide derivatives of ferulic acid (FA) with the formation of ester bonds. The obtained graft copolymers, thanks to the crosslinking capability
Simone Pepi +12 more
doaj +5 more sources
Biodegradability of Oxidized Poly(vinyl alcohol) [PDF]
Bioscience, Biotechnology, and Biochemistry, 1996 Poly(vinyl alcohol) dehydrogenase (PVADH) purified from Pseudomonas sp. 113P3 catalyzed an oxidation of poly(vinyl alcohol) (PVA) in the presence of pyrroloquinoline quinone (PQQ) to give a beta-diketone structure on PVA. Although PVADH oxidized not only enzymatically oxidized PVA but also chemically oxidized PVA, PVA-degrading microorganisms ...
HATANAKA, Tadashi +5 more
openaire +2 more sources
Polymers, 2022 Novel poly(vinyl alcohol) (PVA)/poly(vinyl butyral–vinyl alcohol) (P(VB-VA)) films with improved hydrophobicity were prepared from poly(vinyl acetate) (PVAc)/poly(vinyl butyral) (PVB) blend films with various mass ratios by saponification in a heterogeneous medium.
Seong Baek Yang +4 more
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Poly(vinyl alcohol)/poly(vinyl pyrrolidone) hydrogels for the cleaning of art [PDF]
Journal of Colloid and Interface Science, 2019 The cleaning of modern and contemporary paintings is a delicate and challenging operation. Many contemporary paintings exhibit rough, clotted and pitted surfaces, where the removal of soil is difficult. Gels are among the most efficient tools to achieve controlled and efficient cleaning of works of art.
Nicole Bonelli +4 more
openaire +3 more sources
Long Branching in Poly(vinyl acetate) and Poly(vinyl alcohol). V. Determination of the Long-Chain Branching in Poly(vinyl alcohol). [PDF]
Polymer Journal, 1976 Long branching in poly (vinyl alcohol) (PVA) was quantitatively determined from measurements of the intrinsic viscosity and gel-permeation chromato-graphy of derived poly(vinyl acetate) (PVAc) according to Kurata’s method. The average number of branch points per unit molecular weight, λ3, was observed to lie in the range of 10−6—10−5 for PVA obtained ...
Morishima, Yotaro +2 more
openaire +1 more source
Biodegradation of blend films PVA/PVC, PVA/PCL in soil and soil with landfill leachate
Brazilian Archives of Biology and Technology, 2011 This study investigated the biodegradation of blends films of poly(vinyl alcohol)/poly(vinyl chloride) (PVA/PVC) and poly(vinyl alcohol)/poly(caprolactone) (PVA/PCL) blends films prepared with dimethylformamide under a variety of conditions by ...
Adriana de Campos +2 more
doaj +1 more source
Effect of Chain Extender and Banana Fiber on Melt-Processing Properties of Poly (vinyl alcohol) [PDF]
Warasan Witthayasat Lae Theknoloyi Mahawitthayalai Mahasarakham, 2019 This research aims to study the effect of chain extender and banana fiber on melt processing of poly (vinyl alcohol). 0 and 5 %w/w of banana fiber and 0, 2 and 4 %w/w of chain extender were melt-blended with poly (vinyl alcohol) in an internal mixer at ...
Yottha Srithep
doaj
eXPRESS Polymer Letters, 2012 New thermo-reversible networks were obtained from poly(vinyl furfural) and multifunctional maleimide monomers by Diels-Alder (DA) and retro-DA reactions.
C. Gaina +4 more
doaj +1 more source
International Islamic University Malaysia Engineering Journal, 2012 Blend membranes consisting of chitosan/poly (vinyl alcohol) (CS/PVA) were prepared from a solution casting method and characterized via the pervaporation separation of isopropanol-water mixtures. The solution of pure chitosan was blended with poly(vinyl
S. H. Tan, A. L. Ahmad +1 more
doaj +1 more source
Reduction of V4+ from V5+ using polymer as a surfactant for electrochemical applications
International Journal of Electrochemical Science, 2010 Vanadium dioxide nanowires and nanobelts were synthesized from vanadium pentoxide xerogel through a hydrothermal process. V5+ was reduced to V4+ by a polyblend of poly(vinyl pyrrolidone) (PVP) and poly(vinyl alcohol)(PVA), and by poly(vinyl alcohol)(PVA).
V S Reddy Channu +5 more
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