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[Chemical Knowledge]：Properties and Uses of Insoluble Sulfur

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The nature and use
of insoluble sulfur in the field of raw materials for chemical production
Abstract

This paper introduces in detail the nature and use of insoluble sulfur in the field of raw materials for chemical production. Through the elaboration of the physical properties, chemical properties and production process of insoluble sulfur, readers can have a comprehensive understanding of it. At the same time, this paper also discusses the application of insoluble sulfur in the production of rubber, plastic, paint and other chemicals, as well as its unique anti-spray frost performance.

1. Introduction

insoluble sulfur is a special form of sulfur, compared with ordinary sulfur, insoluble sulfur in rubber, plastics, paint and other chemical production has more excellent performance. Therefore, insoluble sulfur has broad application prospects in the field of chemical production raw materials. This article will introduce the properties and uses of insoluble sulfur in detail, in order to provide reference for the production and research and development of related fields.

2. properties of insoluble sulfur

1. physical properties

insoluble sulfur is light yellow or Milky White crystalline, with a lower melting point (about 120 ℃) and density (about 2.0g/cm³). Insoluble sulfur is stable at room temperature and is not easy to oxidize, but it will decompose into ordinary sulfur and sulfur dioxide at high temperature.

2. Chemical properties

insoluble sulfur has good reactivity in rubber, plastics and other polymer materials. Under heating conditions, insoluble sulfur can cross-link with rubber molecules to improve the strength and aging resistance of rubber. In addition, insoluble sulfur also has anti-blooming performance, which can effectively prevent rubber products from blooming during use.

3. insoluble sulfur production process

insoluble sulfur production process mainly includes melting method, gasification method and oxidation method. Among them, the melting method is to heat and melt ordinary sulfur under high pressure, and then quench to obtain insoluble sulfur; the gasification method is to gasify ordinary sulfur and condense it at low temperature to obtain insoluble sulfur; the oxidation method is to react ordinary sulfur with an oxidant to generate insoluble sulfur.

4. the use of insoluble sulfur

1. Rubber industry

In the rubber industry, insoluble sulfur is widely used as a vulcanizing agent and anti-spray agent. Compared with ordinary sulfur, insoluble sulfur has better dispersion in rubber, which can improve the vulcanization speed and crosslinking density of rubber products, and then improve the strength and aging resistance of rubber products. In addition, the anti-blooming performance of insoluble sulfur can effectively extend the service life of rubber products.

2. Plastic industry

In the plastic industry, insoluble sulfur can be used as a crosslinking agent to improve the heat resistance, oil resistance and wear resistance of plastics. At the same time, insoluble sulfur can also be used to prepare flame retardant plastics to improve the flame retardant properties of plastics.

3. Paint and coating industry

In the paint and coating industry, insoluble sulfur is widely used as a preservative and fungicide. Insoluble sulfur can inhibit the growth of mold and bacteria, improve the weather resistance and durability of paint coatings.

5. conclusion

insoluble sulfur, as a special chemical raw material, has a wide application prospect in the production of rubber, plastic, paint and other chemical products. Its excellent physical and chemical properties enable insoluble sulfur to improve the performance and service life of chemicals. With the continuous progress of science and technology, the production process and application fields of insoluble sulfur will continue to expand.

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