Coefficient Of Thermal Expansion Of Silicone Rubber

The coefficient of thermal expansion for a material is usually specified over a temperature range because it varies depending on the temperature.

Coefficient of thermal expansion of silicone rubber. There are different types depending on functional groups in the structure and curing mechanisms. The coefficient of thermal expansion is defined as the change in length or volume of a material for a unit change in temperature. The following values are given for a temperature around 20 c. This expansion is an advantage for sealing applications.

If the seal is completely confined and the gland is 100 filled the dominating force is the force of thermal expansion of the rubber. The overall coefficient is the linear thermal expansion in per degree. There have been instances where a seal has ruptured a steel gland due to expansion when heated. List of thermal expansion coefficients cte for natural and engineered materials mse supplies is a leading supplier of high quality materials equipment and materials characterization services for advanced materials research and manufacturing.

Silicone rubber 190 0 x 10 6 342 0 x 10 6 mech. Abs pipes pressure ratings pressure ratings of. Thermal expansion is the tendency of matter to change its shape area volume and density in response to a change in temperature usually not including phase transitions. 2 chart 2 plastics and other non metals.

For example silicone may expand linearly 5 9e 4 to 7 9e 4 in in c compared to aluminum at 23 0e 6 in in c or steel at 10 8e 6 in in c. The coefficient of volumetric thermal expansion for all silicone rubber products is in the range of 5 9 to 7 9 x 10 4 4 c. Temperature expansion thermal expansion of pipes and tubes stainless steel carbon steel copper plastics and more. Material properties material properties for gases fluids and solids densities specific heats viscosities and more.

Temperature is a monotonic function of the average molecular kinetic energy of a substance. When a substance is heated molecules begin to vibrate and move more usually creating more distance between themselves. Thermodynamics effects of work heat and energy on systems. Silicones are polymers with a si o si backbone.

Coefficient of thermal expansion silicone has a high thermal expansion coefficient and can be used as a temperature activation method or sensor in the design. Thermal expansion is usually expressed in one of two ways either volumetric expansion or more commonly linear expansion expressed as a coefficient. Main applications are flexible seals o rings etc. These forces are generated by thermal expansion of the rubber and or swelling effect of a fluid.

Find linear thermal expansion coefficient α and volumetric coefficient for thermal expansion β at 20 c for rubber or for different material like brass copper concrete lead silver water and more.