Performance of Organic Silicon Rubber Adhesive
The basic structural unit of organic silicone products is composed of silicon oxygen chain links, and the side chains are connected to various other organic groups through silicon atoms. Therefore, the structure of organic silicon products contains both "organic groups" and "inorganic structures", which combine the characteristics of organic compounds with the functions of inorganic compounds due to their unique composition and molecular structure. Compared with other polymer materials, the outstanding performance of organic silicon products is:
1. Temperature resistance characteristics
Organic silicon products are based on silicon oxygen (Si-O) bonds as the main chain structure. The bond energy of C-C bonds is 82.6 kcal/mol, and the bond energy of Si-O bonds in organic silicon is 121 kcal/mol. Therefore, organic silicon products have high thermal stability, and the chemical bonds of molecules do not break or decompose under high temperature (or radiation irradiation). Organosilicon is not only resistant to high temperatures, but also to low temperatures, and can be used over a wide temperature range. Both chemical and physical mechanical properties change very little with temperature.
2. Weather resistance
The main chain of organosilicon products is - Si-O -, with no double bonds present, making them less susceptible to decomposition by ultraviolet light and ozone. Organic silicon has better thermal stability, radiation resistance, and weather resistance than other polymer materials. The service life of organic silicon in natural environments can reach several decades.
3. Electrical insulation performance
Organic silicon products have excellent electrical insulation properties, with dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity, and surface resistivity ranking among the top insulation materials. Moreover, their electrical performance is minimally affected by temperature and frequency. Therefore, they are a stable electrical insulation material widely used in the electronics and electrical industries. Organic silicon not only has excellent heat resistance, but also excellent water repellency, which is a guarantee of high reliability for electrical equipment to be used under wet conditions.
4. Physiological inertia
Polysiloxane compounds are one of the known less active compounds. They are highly resistant to biological aging, have no rejection reaction with animal bodies, and have good anticoagulant properties.
5. Low surface tension and low surface energy
The main chain of organosilicon is very flexible, and its intermolecular forces are much weaker than those of hydrocarbons. Therefore, it has lower viscosity, weaker surface tension, lower surface energy, and stronger film-forming ability than hydrocarbons of the same molecular weight. This low surface tension and low surface energy are the main reasons for its various applications: hydrophobic, defoaming, foam stability, anti sticking, lubrication, polishing and other excellent properties.