Polyvinyl alcohol (PVA) is widely used and my country is the world’s largest producer and exporter.

​ ​ ​ Polyvinyl alcohol (PVA) is a water-soluble polymer produced by the alcoholysis of polyvinyl acetate. Its chemical formula is [C2H4O]n and it is an important chemical raw material. Polyvinyl alcohol appears as white floc, flake or powdery solid, soluble in water, but insoluble in methanol, toluene, gasoline and kerosene. Polyvinyl alcohol has the…