What is the effect of adding sulfur to silicone products?

Silicone products with sulfur, silicone products is a widely used product, and the raw material of silicone products is a kind of polymer material with a variety of excellent properties, with high temperature resistance, good chemical stability, strong mechanical properties and other characteristics. In the production process of silicone products, sulfur is a very important link.

First, the principle of silica gel sulfur

Silicone sulfur is in the production process of silicone products, through the vulcanization reaction to produce cross-linking between silicone molecules, forming a three-dimensional network structure, so as to improve the performance of silicone. The vulcanization reaction is usually carried out at high temperatures, the general temperature is between 120-180 ° C, and the reaction time depends on the thickness of the silica gel and the vulcanization conditions. During the vulcanization process, the silicone molecules in the silicone products react with the vulcanizing agent to produce a new chemical bond, which makes the structure between the silicone molecules more compact and improves the strength, toughness and wear resistance of the silicone.

Second, the role of silicone sulfur

1. Improve strength and toughness

After sulfur is added to silica gel, a three-dimensional network structure is formed between molecules, which makes silica gel have higher strength and toughness, and can withstand greater external forces and wear. This is of great significance for silicone products in practical applications, such as silicone tubes, silicone plugs, etc.

2. Increase wear resistance

After adding sulfur, the surface hardness of silica gel is improved, and the wear resistance is obviously enhanced. This has a good effect on the application of silicone products in high temperature, high pressure and high friction environments, and improves the service life of silicone products.

3. Improve heat resistance

After sulfur is added to silica gel, its heat resistance is significantly improved, and it can maintain good performance and shape under high temperature environment. This is of great significance for the application of silica gel in high temperature environments, such as automotive, aerospace and other industrial fields.

4. Improve chemical stability

After sulfur is added to silica gel, its chemical stability is improved and it can resist a certain degree of chemical corrosion and oxidation. This makes the silicone products have good application performance in special environments such as chemicals and solvents.

5. Enhanced biocompatibility

After adding sulfur to silica gel, its biocompatibility is improved and the stimulation to human tissue is reduced. This makes silica gel in medical, food and other areas of contact with the human body has a good application prospect.

Third, the effect of silicone sulfur on the performance of silicone products

1. Physical properties

After sulfur is added to silica gel, its hardness, strength, toughness and other physical properties are significantly improved, which can meet the needs of different application scenarios. At the same time, after sulfur is added to silica gel, its density, pore structure and other physical properties will also change to a certain extent, which needs to be adjusted according to the specific application requirements.

2. Chemical properties

After sulfur is added to silica gel, its chemical stability and corrosion resistance are improved, and it can resist the erosion of chemical substances within a certain range. However, after sulfur is added to silica gel, the surface vulcanization agent residue may affect some chemical properties of silica gel, such as oxidation resistance.

3. Biological properties

After adding sulfur to silica gel, its biocompatibility is improved and the stimulation to human tissue is reduced. However, some harmful substances, such as hydrogen sulfide, may be produced during the process of silica gel sulfuration, and it is necessary to strictly control the sulfuration conditions to ensure the biological properties of silicone products.