The high temperature resistance of silicone varies depending on its type and manufacturing process.
Generally speaking, the high temperature resistance range of silicone can range from relatively low temperatures to quite high temperatures. The following is a detailed explanation of the high temperature resistance performance of silicone gel:
1, High temperature resistance range of ordinary silicone
Conventional range: The temperature resistance range of ordinary silicone is generally between minus 60 degrees Celsius and 200 degrees Celsius. This is the temperature range of silicone under general application conditions, which can meet most conventional usage needs.
2, High temperature resistance range of silicone gel
Scope of improvement: By utilizing high-quality materials and improving production processes, the high temperature resistance of silicone can be significantly enhanced. Some special silicone can withstand higher temperatures in a short period of time. For example, some high-temperature resistant silicone can increase its temperature resistance to around 350 degrees Celsius in a short period of two hours.
Application areas: This high-temperature resistant silicone is widely used in sealing, insulation, protection, and other aspects in high-temperature environments, such as aerospace, automotive manufacturing, electronics, and other fields.
3, The relationship between high temperature resistance and morphology of silicone gel
Solid silicone gel: Solid silicone gel has relatively good high temperature resistance. Due to its stable shape, more heat-resistant fillers can be added to improve its high temperature resistance.
Liquid silicone gel: Liquid silicone gel needs to remain liquid, so the amount of heat-resistant filler added is relatively small, resulting in poorer heat resistance than solid silicone gel. But in certain specific applications, liquid silicone gel is also used due to its unique properties.
4, Other characteristics of high temperature resistance of silicone gel
Thermal stability: The molecular structure of silicon atoms in silica gel is unique, connected to methyl groups, and exhibits a helical structure. At the same time, the bond angle and bond length are relatively large, which makes silica gel highly thermally stable.
Cold resistance: In addition to high temperature resistance, silicone also has good cold resistance, which can maintain elasticity and stable performance in low temperature environments.
Chemical resistance: Silicone can quickly recover its properties after the evaporation of oily or polar solvents, avoiding softening or expansion, thus having good chemical resistance.