[Chemical Knowledge]：Nature and Uses of DAA

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DAA (adipic acid) in the chemical production of raw materials in the field of the nature and use
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1. Introduction

DAA, also known as adipic acid, is an important organic chemical raw materials, widely used in the production of plastics, fibers, rubber and other polymer compounds. This article will discuss the nature and use of DAA in detail.

2. the nature of DAA

1. Physical properties: DAA is a colorless or yellowish crystals, with a high melting point (152-153 ℃) and boiling point (332.7 ℃), insoluble in water, but can be dissolved in most organic solvents.
2. Chemical properties: DAA has strong acidity and can react with alkali to form salt. In addition, it can also undergo esterification, amidation, polycondensation and other reactions to produce various polymers.

3. the use of DAA

1. Production of nylon: DAA is an important raw material for the production of nylon 66. It reacts with hexamethylene diamine to generate nylon 66 salt and further polymerizes to generate nylon 66 resin. Nylon 66 has excellent properties such as high strength, wear resistance and heat resistance, and is widely used in engineering plastics, fibers and rubber.
2. Production of plasticizers: DAA can be used as the main raw material for the production of plasticizers for the production of dioctyl phthalate (DOP) and other products with good plasticizing efficiency for plastics.
3. The production of unsaturated polyester resin: DAA and maleic anhydride reaction to produce unsaturated polyester resin, this resin has excellent resistance to chemical corrosion, widely used in FRP, coatings and other fields.
4. Other uses: In addition to the above main uses, DAA can also be used to produce various esters, amides, as well as food additives, pharmaceutical intermediates.

4. conclusion

In conclusion, DAA, as an important organic chemical raw material, has a wide range of applications in the field of chemical production raw materials. Its diversity of properties and uses makes DAA play an important role in the production of plastics, fibers, rubber and other polymer compounds. With the continuous development of science and technology, the application field of DAA will continue to expand, bringing more contributions to human production and life.

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