polüvinüülalkohol

Polyvinyl alcohol, often abbreviated as PVA or PVOH, is a synthetic polymer. It is a water-soluble synthetic polymer produced by the hydrolysis of polyvinyl acetate. The degree of hydrolysis refers to the percentage of acetate groups that have been converted to hydroxyl groups. This degree significantly impacts the properties of the PVA.

PVA is a white, brittle solid in its dry form. It is insoluble in most organic solvents but readily dissolves in water, with solubility depending on the degree of hydrolysis and molecular weight. Higher hydrolysis leads to lower water solubility. It exhibits good film-forming, emulsifying, and adhesive properties. It is also known for its excellent tensile strength and flexibility.

Key applications for polyvinyl alcohol include its use as a binder in paper coatings, textile sizing, and adhesives. It is also utilized in the production of films, fibers, and as a protective colloid in the polymerization of vinyl chloride. In the medical field, PVA is employed in contact lenses and as a component in some surgical implants. Its biodegradability is a subject of ongoing research and development.