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[Chemical Knowledge]：Manufacturing method and process of special synthetic rubber

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The manufacturing method
of special synthetic rubber
1. Introduction

Special synthetic rubber has an important position in the field of chemical production raw materials. Because of its unique physical and chemical properties, it is widely used in automobile, aviation, construction, electronics and other fields. This paper will introduce the manufacturing methods of special synthetic rubber in detail, including raw material preparation, synthetic reaction, post-treatment and other processes, in order to provide some reference for the development of chemical production raw materials.

2. raw material preparation

1. basic monomer: the main raw material of special synthetic rubber is the basic monomer, common monomers include butadiene, styrene, acrylonitrile, etc.
2. initiator: compounds used to initiate the polymerization of monomers, common initiators are benzoyl peroxide, azobisisobutyronitrile and the like.
3. Catalyst: a compound used to accelerate or control the rate of polymerization, such as aluminum chloride, tetraethyl titanate, etc.

3. synthesis reaction

special synthetic rubber synthesis reaction mainly uses polymerization reaction, including emulsion polymerization, suspension polymerization, solution polymerization and other methods. The following emulsion polymerization as an example, the introduction of special synthetic rubber manufacturing process:

1. the basic monomer, initiator, catalyst and other raw materials in accordance with a certain proportion of the polymerization kettle.
2. At appropriate temperature and pressure, the initiator decomposes to produce free radicals, which initiate the polymerization of the monomers.
3. The polymer molecular chain grows to form a high molecular compound.
4. By controlling the reaction conditions and additives, the molecular weight, molecular weight distribution and structure of the polymer are adjusted to obtain special synthetic rubber with specific properties.

4. post-treatment

1. Coagulation: Add coagulant to the polymer to coagulate the latex particles into solid particles, and then separate the water and unreacted monomer.
2. Drying: The coagulated solid particles are dried to remove residual moisture and other volatile components.
3. Mixing: Mixing the dried special synthetic rubber with other compounding agents (such as fillers, plasticizers, etc.) to improve the performance and processability of the rubber.
4. Molding: The kneaded rubber is processed into a desired shape and size by molding methods such as extrusion, calendering, and injection.

5. quality control and testing

1. Quality control: In the manufacturing process, the quality of raw materials, reaction conditions, product performance and other aspects need to be strictly controlled to ensure stable product quality.
2. testing: the production of special synthetic rubber performance testing, such as tensile strength, tear strength, hardness, wear resistance, etc., to ensure that the product meets the relevant standards and customer requirements.

6. environmental protection and sustainable development

1. Waste gas treatment: effective treatment of waste gas generated in the production process to reduce the impact on the environment. Common treatment methods include combustion method, absorption method, adsorption method, etc.
2. Wastewater treatment: The wastewater generated in the production process is purified and discharged or recycled after reaching the discharge standard. Commonly used treatment methods are physical, chemical and biological methods.
3. Waste residue treatment: reasonable disposal of waste residue generated in the production process, which can be incinerated, landfilled or resource utilization.
4. Energy saving and emission reduction: adopt advanced production technology and equipment to improve energy efficiency and reduce energy consumption and carbon emissions.

7. conclusion

special synthetic rubber has a wide application prospect in the field of chemical production raw materials, and its manufacturing method involves many links and processes. By strictly controlling the quality of raw materials, optimizing synthesis reaction conditions, strengthening post-treatment and quality control, special synthetic rubber with excellent performance and stable quality can be produced, which provides strong support for the development of various fields. At the same time, strengthen the work of environmental protection and sustainable development, ensure that the production process meets the requirements of environmental protection, and create more value for enterprises and society.

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