Silicone rubber, as a material widely used in various fields, has attracted much attention because of its unique physical properties. Understanding the basic knowledge of the physical properties of silicone rubber helps to better understand its application in different fields. The physical properties of silicone rubber are discussed in this paper.
First.The basic composition and structure of silicone rubber
Silicone rubber is mainly composed of polysiloxane (Silicone), which is a polymer elastomer whose main chain structure is silico-oxygen bond. Its molecular chain has good thermal stability, oxidation resistance and weather resistance.
Second. Physical properties of silicone rubber
1. High elasticity and low compression permanent deformation: silicone rubber has high elasticity and can maintain good elasticity in a wide temperature range. At the same time, the compression permanent deformation rate of silicone rubber is low, which means that its shape recovery ability is strong.
2. Excellent heat resistance: silicone rubber has high heat resistance and can maintain good performance in the temperature range of -60 ° C to 250 ° C. Its thermal stability makes it suitable for applications in a variety of high temperature environments.
3.Low temperature flexibility: silicone rubber can still maintain good flexibility and elasticity at low temperatures, so that it can still play a good performance in an extremely cold environment.
4. Excellent electrical insulation properties: silicone rubber has high insulation, and its good electrical properties make it an ideal material for electronics and electrical fields.
5.. Physiological inertia and biocompatibility: silicone rubber is non-toxic and harmless to organisms, has excellent physiological inertia and biocompatibility, and is suitable for medical treatment, bioengineering and other fields.
6.. Low surface energy and hydrophobicity: The surface energy of silicone rubber is low, making it hydrophobic, not easy to absorb dust and dirt, and easy to clean.
7. Excellent light transmission and weather resistance: silicone rubber has good stability to ultraviolet rays, ozone and so on, is not easy to age, suitable for outdoor environment.
8. Good damping performance: silicone rubber has excellent shock absorption and sound insulation performance, which can effectively absorb vibration and noise.
9. Excellent electrical insulation: silicone rubber has good dielectric properties and can be used to manufacture high voltage insulation materials.
10. Chemical stability: silicone rubber has stability for most chemical substances and is not easy to react, so that it can maintain stable performance in a variety of chemical environments.
Third, the application field of silicone rubber
Due to the above excellent physical properties, silicone rubber has been widely used in many fields. For example, in the medical field, silicone rubber can be used to manufacture medical equipment such as catheters and drainage tubes; In the aerospace field, silicone rubber can be used to make sealing materials and coatings; In the field of electronics and electrical, silicone rubber can be used to manufacture insulation and protective coatings for wires and cables; In the field of construction, silicone rubber can be used for waterproof materials and sealing materials.
Fourth. Summary
Understanding the basic knowledge of the physical properties of silicone rubber helps to better understand its application in different fields. Due to its unique physical properties, such as high elasticity, excellent heat resistance, physiological inertness and biocompatibility, silicone rubber has been widely used in medical, aerospace, electronics and construction and other fields. With the continuous development of science and technology, the application prospect of silicone rubber will be broader.
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