Polyvinyl Alcohol

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polyvinyl alcohol

[¦päl·i′vīn·əl ′al·kə‚hȯl]
(organic chemistry)
Water-soluble polymer made by hydrolysis of a polyvinyl ester (such as polyvinyl acetate); used in adhesives, as textile and paper sizes, and for emulsifying, suspending, and thickening of solutions. Abbreviated PVA.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Polyvinyl Alcohol


a white solid polymer, [—CH2— CH(OH)—]n, having a degree of polymerization n up to 5,000 and containing as much as 68 percent crystalline phase in the form of microcrystalline formations. Polyvinyl alcohol is nontoxic.

The only practical solvent for polyvinyl alcohol is water. Polyvinyl alcohol does not dissolve in organic solvents and is especially resistant to the action of oils, fats, gasoline, and other hydrocarbons, as well as to the action of dilute acids and alkalies. In industry, polyvinyl alcohol is produced by the saponification of polyvinyl acetate in a methanol solution in the presence of strong acid and alkaline catalysts. Polyvinyl alcohol that contains up to 30 percent residual vinyl acetate monomeric units (solvars or soviols) can be obtained by controlling the degree of saponification.

Polyvinyl alcohol is used in the manufacture of fibers and films. It is also utilized as an emulsifier, thickener, and adhesive. Special brands of polyvinyl alcohol with low molecular weights are important in the food industry and medicine. They are used, for example, as plasma substitutes during blood transfusions and also in drug production.

World production of polyvinyl alcohol in 1973 was about 220,000 tons.


See references under .


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
B--Chinese poly vinyl alcohol (PVA)-1600 was used, it is white, odorless, and the particles have bead shape.
"The similarity in the furnish used (100% rag content), PH of the paper and surface sizing (presence of poly vinyl alcohol) clearly indicates that similar manufacturing process has been adopted in case of FICN and legal tender of that country.
Poly vinyl alcohol (PVA) was purchased from Loba Chemie, Mumbai, India, and was used without further purification.
Transcatheter embolisation was performed effectively in these patients with coils, poly vinyl alcohol and Gelfoam.
He was treated with poly vinyl alcohol particles and coil embolisation.
Several studies have investigated the dosimetry characteristics of a poly vinyl alcohol based on nitro blue tetrazolium chloride dye for high dose applications.
The composite of PANI with poly vinyl alcohol (PVA) showed easy processibility and proved beneficial for solid state batteries [29].