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[Chemical Knowledge]：Production and manufacturing methods and processes of ABS plastics

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of ABS plastic manufacturing method
ABS plastic is a synthetic material widely used in the field of chemical production. Because of its excellent physical properties and processing properties, it is widely used in various fields such as home appliances, automobiles, and construction. This article will introduce the manufacturing method of ABS plastic.

1. ABS plastic composition and properties

ABS plastic is a terpolymer, mainly composed of acrylonitrile (A), butadiene (B) and styrene (S) three monomers. Among them, acrylonitrile provides chemical resistance and hardness, butadiene provides toughness and low temperature impact resistance, and styrene provides processing fluidity and gloss. Therefore, ABS plastic has excellent physical properties and processing properties, can withstand high impact force and pressure, and has good heat resistance, weather resistance and electrical insulation.

2. ABS plastic manufacturing method

ABS plastic manufacturing method mainly has emulsion polymerization, suspension polymerization and solution polymerization, and so on, the emulsion polymerization method is one of the commonly used methods. Next, the manufacturing process of the emulsion polymerization method will be described.

1. Preparation of Monomers

First, three monomers of acrylonitrile, butadiene and styrene are prepared into mixed monomers according to a certain proportion.

2. Formulation of Emulsifier

In order to make the monomer form a stable emulsion in water, it is necessary to add an appropriate amount of emulsifier. Commonly used emulsifiers are sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, etc.

3. Polymerization

The prepared mixed monomer and emulsifier are added into a reaction kettle, an initiator (such as ammonium persulfate) is introduced, and the polymerization reaction is carried out at an appropriate temperature and stirring speed. During the reaction, the monomer is gradually converted into a polymer while forming a stable emulsion.

4. Dehydration and Drying

The emulsion obtained by the reaction was dehydrated and dried to obtain ABS resin particles.

3. ABS plastic manufacturing precautions

1. Control the reaction temperature and time

polymerization reaction is an exothermic reaction, the reaction temperature and time need to be controlled to prevent the polymer molecular weight from being too large or too small, affecting product quality.

2. Control the amount and type of emulsifier
The amount and type of
emulsifier have an important influence on the stability of the emulsion, and need to be selected and controlled according to the actual situation.

3. Pay attention to prevent product agglomeration and deformation during dehydration and drying.

During the dehydration and drying process, attention should be paid to controlling temperature and air volume to prevent product agglomeration and deformation, which will affect product quality.

4. summary

ABS plastic manufacturing methods mainly emulsion polymerization, suspension polymerization and solution polymerization, and so on, emulsion polymerization is one of the commonly used methods. In the manufacturing process, it is necessary to control the reaction temperature and time, the amount and type of emulsifier and other factors to ensure product quality. At the same time, in the dehydration, drying process also need to pay attention to prevent product agglomeration and deformation.

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