icon HOME / NEWS

Detailed Analysis Of Organic Silicone Properties

🕙 2023-08-16 👆

Silicone properties

The basic structural unit of organic silicone products is composed of silicon-oxygen chains, and the side chains are connected to other organic groups through silicon atoms. Therefore, the structure of silicone products contains both "organic groups" and "inorganic structure", and this special composition and molecular structure makes it integrate the characteristics of organic matter and the function of inorganic matter in one. Compared with other polymer materials, the most outstanding properties of silicone products are:

1. Temperature resistance characteristic

Silicone products are based on silicon-oxygen (Si-O) bond chain structure, C-C bond energy 82. 6 kcal/g molecule, the bond energy of Si-O bond is 121 kcal/g molecule in silicone, so the thermal stability of silicone products is high, and the chemical bond of the molecule is not broken and not decomposed at high temperature (or radiation irradiation). Silicone is not only resistant to high temperature, but also low temperature, and can be used in a wide temperature range. Both chemical properties and physical and mechanical properties change little with temperature.

2. Weather fastness

The main chain of silicone products is -SI-O -, and no double bonds exist, so it is not easy to be decomposed by ultraviolet light and ozone. Silicone has better thermal stability and radiation and weather resistance than other polymer materials. The service life of organic silicon in natural environment can reach several decades.

3. Electrical insulation property

Silicone products have good electrical insulation properties, and their dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best insulating materials, and their electrical properties are little affected by temperature and frequency. Therefore, they are a stable electrical insulation material and are widely used in the electronic and electrical industry. In addition to excellent heat resistance, silicone also has excellent water resistance, which is the guarantee of high reliability for the use of electrical equipment under wet conditions.

4. Physiological inertia

Polysiloxanes are some of the most inactive compounds known. They are very resistant to biological aging, have no rejection reaction with animals, and have good anticoagulant properties.

5. Low surface tension and low surface energy

The main chain of organosilicon is very flexible, and the intermolecular force is much weaker than that of hydrocarbons, so it has low viscosity, weak surface tension, small surface energy and strong film forming ability than hydrocarbons of the same molecular weight. This low surface tension and low surface energy is the main reason for its many applications: hydrophobic, defoaming, foam stabilization, anti-sticking, lubrication, glazing and other excellent properties.

The use of silicone

Because of the above excellent properties of silicone, its application range is very wide. it

It is only used as special materials in aviation, cutting-edge technology, and military technology departments, and it is also used in various departments of the national economy, and its application scope has expanded to: construction, electronics and electrical, textile, automobile, machinery, leather and paper, chemical and light industry, metal and paint, medicine and medical treatment.