PVA is a basic chemical material with great potential for development, it has good spinning property, film-forming, and adhesion, and it is widely used in the fields of chemical industry, textile, plastics, papermaking, tanning, bonding, and construction. It has the advantages of easy degradation and pollution-free environment and has a wide space for industrial development.
I. Name: Polyvinyl alcohol
Abbreviation: PVA
II. the molecular composition and structure:
( CH3CHCOOCH3 )x ( CH2CHOH )y
in which: x + y indicates the degree of polymerization, y / (x + y) that alcoholysis degree
III. The physical and chemical properties
1. The physical property
A. Solubility:
The Polyvinyl alcohol powder can be dissolved in water. PVA with Less than 95%alcoholysis degrees can be dissolved in water at room temperature and PVA with more than 99.5% alcoholysis degree can only be dissolved in hot water above 95℃.
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