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SIS (styrene isoprene styrene) ternary copolymer is an important raw material for chemical production, widely used in rubber, plastics, adhesives and other fields. The manufacturing method of SIS will be introduced below

1、 Raw material preparation 

1 Styrene: Styrene is one of the main components of SIS, used to provide hardness and rigidity

2. Isoprene: Isoprene is another major component in SIS, used to provide elasticity and flexibility

3. Initiating agent: used to initiate monomer polymerization reactions. Commonly used initiators include benzoyl peroxide, azodiisobutyronitrile, etc

4. Solvents: Used to adjust the viscosity of polymerization reaction systems, commonly used solvents include toluene, ethylbenzene, etc

2、 Manufacturing process 

1 Ingredients: Add styrene, isoprene, initiator, and solvent to the polymerization reactor according to the predetermined ratio

2. Polymerization reaction: Under appropriate temperature and pressure, the initiator decomposes to produce free radicals, triggering monomer polymerization reaction. The polymerization reaction can be divided into three stages: initiation stage, growth stage, and termination stage

3. Post treatment: After the polymerization reaction is completed, post-treatment processes such as degassing, devolatilization, and extrusion granulation are carried out to obtain SIS finished products

3、 Notes 

1 Strictly control the temperature and pressure of the polymerization reaction to ensure the smooth progress of the reaction

The type and dosage of initiators have a significant impact on the speed of polymerization reaction and the molecular weight of the product, which needs to be adjusted according to the actual situation

During the post-processing process, it is necessary to ensure the quality and stable performance of the product

4、 As an important raw material for chemical production, SIS is widely used in the following fields: Rubber products: SIS can be used to produce rubber products such as tires, hoses, and tapes, improving the wear resistance, crack resistance, and elasticity of the products

2. Plastic products: SIS can be used to produce plastic modifiers, tougheners, etc., to improve the toughness and impact resistance of plastic products

3. Adhesive: SIS can be used as the basic component of adhesive to improve its adhesion and weather resistance

In summary, the manufacturing method of SIS involves multiple stages and precautions, requiring strict control of process parameters and quality indicators for each process to ensure stable product quality and performance. Meanwhile, SIS, as an important raw material for chemical production, has broad application prospects in fields such as rubber, plastics, and adhesives.