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[Chemical Knowledge]：Properties and Uses of Polyvinyl Alcohol

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Polyvinyl alcohol (Polyvinyl Alcohol, PVA) is an important raw material for chemical production and has a wide range of applications. This article will detail the properties and uses of polyvinyl alcohol.

1. the properties of polyvinyl alcohol

1. Physical properties
polyvinyl alcohol is a white or yellowish particles or powder with high hygroscopicity and good film-forming properties. It is easily soluble in water and can form a viscous colloidal solution, but it is not easily soluble in organic solvents. The molecular chain of polyvinyl alcohol contains a large number of hydroxyl groups, which makes it have strong hydrogen bonding, which gives it unique physical and chemical properties.

2. chemical properties
polyvinyl alcohol has good chemical stability and can resist the corrosion of acid, alkali and salt. At the same time, polyvinyl alcohol also has good thermal stability and can be used at higher temperatures. In addition, polyvinyl alcohol also has biodegradability and biocompatibility, so it has a wide range of applications in the biomedical field.

2. the use of polyvinyl alcohol

1.
of building materials Polyvinyl alcohol has a wide range of applications in the field of building materials, mainly as adhesives and thickeners. It can improve the strength and water resistance of concrete, and can also be used as an adhesive for building materials such as ceramic tiles and gypsum boards.

2. Textile printing and dyeing
In the textile printing and dyeing industry, polyvinyl alcohol is mainly used as slurry and printing paste. It can improve the abrasion resistance and wrinkle resistance of the fabric, and give the fabric a good feel and luster.

3. Paper Industry
In the paper industry, polyvinyl alcohol is mainly used as a surface sizing agent and reinforcing agent. It can improve the strength and water resistance of the paper and improve the surface properties of the paper.

4. Biomedical
Polyvinyl alcohol has a wide range of applications in the field of biomedicine due to its good biodegradability and biocompatibility. It can be used as a drug carrier, tissue engineering scaffolds, etc., and can also be used to make medical devices and dressings.

In short, polyvinyl alcohol as an important chemical production raw materials, in various fields have a wide range of applications. With the continuous development of science and technology, the application field of polyvinyl alcohol will continue to expand.

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