Polyvinyl Alcohol (PVA, PVAL, PVOH)
Polyvinyl alcohol (PVAL, PVA, PVOH) is a thermoplastic material that is produced as a white to yellowish powder, mostly by saponification (hydrolysis) of polyvinyl acetate (PVAC). The direct synthetic route is not possible.
PVAL is resistant to almost all anhydrous organic solvents. Partially saponified PVAL grades with approx. 13% PVAC content are readily soluble in water. As the degree of saponification increases, the solubility in water decreases.
Properties of PVA
- High tensile strength
- Absorbing water
- Resistant to oils, fats and organic solvents
Applications of PVA
Paper manufacturing & processing, plywood, art board & wood processing, emulsifying and stabilizing agents, construction industry, PVA film, printing, textile.
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