Results 221 to 230 of about 24,336 (264)
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Biodegradability of poly(vinyl alcohol)
Polymer Engineering & Science, 1999AbstractPlastic waste increases at a rate of several tons per year and the time required for their biodegradation is often unknown. The Phanerochaete chysosporium fungus oxidizes a wide variety of toxic organic compounds to nontoxic compounds or CO2 and H2O.
O. Betty Lucy López +2 more
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Journal of Polymer Science Part B: Polymer Physics, 1994
AbstractMiscibility of poly(4‐vinyl pyridine) (P4VP) and poly(2‐vinyl pyridine) (P2VP) with poly(viny acetate) (PVAc), poly(vinyl alcohol) PVA and poly(vinyl acetate‐co‐alcohol) (ACA copolymers) has been investigated over a wide composition range. Differentiaal scanning calorimetry (DSC) results indicate that P2VP is immiscible with PVAC, PVA, and ...
L. C. Cesteros, J. R. Isasi, Issa Katime
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AbstractMiscibility of poly(4‐vinyl pyridine) (P4VP) and poly(2‐vinyl pyridine) (P2VP) with poly(viny acetate) (PVAc), poly(vinyl alcohol) PVA and poly(vinyl acetate‐co‐alcohol) (ACA copolymers) has been investigated over a wide composition range. Differentiaal scanning calorimetry (DSC) results indicate that P2VP is immiscible with PVAC, PVA, and ...
L. C. Cesteros, J. R. Isasi, Issa Katime
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Journal of Polymer Science Part A: Polymer Chemistry, 1996
During the emulsion polymerization of vinyl acetate (VAc) using poly(vinyl alcohol) (PVA) as stabilizer and potassium persulfate as initiator, the VAc reacts with PVA forming PVA-graft-PVAc. When the grafted polymer reaches a critical size it becomes water-insoluble and precipitates from the aqueous phase contributing to the formation of polymer ...
G. S. Magallanes Gonz�lez +5 more
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During the emulsion polymerization of vinyl acetate (VAc) using poly(vinyl alcohol) (PVA) as stabilizer and potassium persulfate as initiator, the VAc reacts with PVA forming PVA-graft-PVAc. When the grafted polymer reaches a critical size it becomes water-insoluble and precipitates from the aqueous phase contributing to the formation of polymer ...
G. S. Magallanes Gonz�lez +5 more
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Polymer, 1994
Poly(vinyl alcohol) (PVA) Sloviol R was modified to different degrees by acetalization reactions with aldehyde (formaldehyde, acetaldehyde, propionaldehyde and n-butyraldehyde) for 6 h at 60°C in the presence of HCl as catalyst. Samples of the modified PVA were tested as dispersants in vinyl chloride suspension polymerization.
V. Macho +4 more
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Poly(vinyl alcohol) (PVA) Sloviol R was modified to different degrees by acetalization reactions with aldehyde (formaldehyde, acetaldehyde, propionaldehyde and n-butyraldehyde) for 6 h at 60°C in the presence of HCl as catalyst. Samples of the modified PVA were tested as dispersants in vinyl chloride suspension polymerization.
V. Macho +4 more
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Poly-Sugar: Modification of Poly(vinyl Alcohol)
Journal of Macromolecular Science: Part A - Chemistry, 1979Abstract This paper describes the attachment of sugar (sucrose) onto low molecular weight poly(vinyl alcohols) (etherification) to produce a new class of synthetic sweetener. Because of its regulated molecular weight, the new sweetener would pass through the digestive tract and be excreted in its original molecular form. We have termed the new class of
A. M. Usmani, I. O. Salyer
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Characterization of associating hydrogels of poly(vinyl alcohol) and poly(vinyl pyrrolidone)
Journal of Applied Polymer Science, 2009AbstractIn this study, hydrogels were prepared from blends of poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP). The miscibility of the polymers was confirmed with differential scanning calorimetry with the appearance of a single glass‐transition temperature.
X. Liu +3 more
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Tacticity of poly(vinyl alcohol) and poly(vinyl trifluoroacetate) by NMR
Journal of Polymer Science Part B: Polymer Letters, 1965Kermit C. Ramey, Nathan D. Field
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NMR spectra of poly(vinyl acetate) and poly(vinyl alcohol)
Journal of Polymer Science Part B: Polymer Letters, 1967Kermit C. Ramey, David C. Lini
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