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[Chemical Knowledge]：Properties and Uses of Polyacrylamide

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Polyacrylamide (Polyacrylamide, PAM) is an important organic polymer compound, which is widely used in the field of chemical production raw materials. It has unique properties and uses, and is of great significance for improving the quality and output of chemical products. This article will detail the properties and uses of polyacrylamide.

1. the properties of polyacrylamide

1. Physical properties
polyacrylamide is white powder or granular solid, with high hygroscopicity. It is readily soluble in water, forming a viscous colloidal solution. At different pH values and temperatures, polyacrylamide solutions have different viscosities and fluidity.

2. Chemical properties
polyacrylamide has good chemical stability, and has good resistance to acid, alkali, salt and other chemical substances. At the same time, it also has good thermal stability and can be used at higher temperatures.

3. Biodegradable
polyacrylamide has good biodegradability and can be decomposed into harmless substances by microorganisms in the natural environment without polluting the environment. The use of

2. polyacrylamide

1. water treatment agent
polyacrylamide as a water treatment agent, can effectively remove suspended solids in the water, colloidal substances and organic pollutants, improve the clarity and transparency of the water. At the same time, it can also adjust the pH value of the water to prevent scaling of pipelines and equipment.

2. Papermaking additives
In the papermaking process, polyacrylamide can be used as a reinforcing agent and retention agent to improve the strength and whiteness of paper, and reduce paper tearing and breakage. At the same time, it can also improve the dry and wet strength of the paper and improve the printing performance of the paper.

3. Oil extraction additives
In the process of oil extraction, polyacrylamide can be used as oil displacement agent and profile control agent to improve oil recovery. At the same time, it can also prevent oil well blockage and extend the service life of oil well.

4. Textile printing and dyeing auxiliaries
In the process of textile printing and dyeing, polyacrylamide can be used as slurry and printing paste to improve the printing quality and color vividness of fabrics. At the same time, it can also improve the abrasion resistance and wrinkle resistance of the fabric.

5. Soil conditioner
polyacrylamide as a soil conditioner can improve the structure and air permeability of the soil, improve the water retention and fertility of the soil, and promote the growth and development of crops. The production process of

3. polyacrylamide
The production process of
polyacrylamide mainly includes aqueous solution polymerization, inverse emulsion polymerization and solid phase polymerization. Among them, the aqueous solution polymerization method is a commonly used production process, mainly by adding raw materials such as monomers, initiators and crosslinking agents into water, and polymerizing under stirring and heating conditions to generate a polyacrylamide colloidal solution. Inverse emulsion polymerization and solid phase polymerization can also be used to produce polyacrylamide, but the production cost is higher and the application is less.
Precautions for
4. polyacrylamide

When using polyacrylamide, you need to pay attention to the following:

1. According to different uses and occasions, choose the appropriate polyacrylamide model and concentration.
2. in the preparation of polyacrylamide solution, should first add water after dosing, stirring evenly before use.
3. in the process of use, should avoid contact with iron, copper and other metal ions, so as not to affect the performance and use of polyacrylamide.
4. In the storage process, should avoid direct sunlight and high temperature environment, keep dry and ventilated.

In short, polyacrylamide as an important chemical production raw materials, has a wide range of uses and good performance. During use, you need to pay attention to selecting the appropriate model and concentration, avoid contact with metal ions, and keep the storage environment dry and ventilated.

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