• Thermal expansion coefficient: Different types of rubber materials have different thermal expansion coefficients. Some rubber materials have relatively high thermal expansion coefficients, which means that when a rubber seal is exposed to a high-temperature environment for a long time, its molecular chains will expand due to heat. The overall volume of the seal increases.

2. Cross-linked structure changes: The cross-linked structure in rubber materials will also undergo certain changes at high temperatures. The temperature increase caused by thermal expansion can cause the breakage and reorganization of the cross-linked structure, causing the expansion of the rubber seal.

• Technological innovation: In-depth research on the expansion mechanism of rubber seals can provide a basis for the development of new materials and improvements in sealing technology. By understanding the mechanism of rubber expansion, more efficient and reliable sealing systems can be designed to meet the temperature changes and sealing performance requirements of different industries.

The expansion of rubber seals is due to the combined effects of the thermal expansion characteristics of the rubber material, thermal energy conduction, thermal expansion differences, and other factors. Rubber seals expand when heated through thermal movement of molecular chains, changes in cross-linked structures, and changes in pore structure. This characteristic makes rubber seals have important application value in temperature compensation and sealing performance improvement. Research on the expansion mechanism of rubber seals not only contributes to technological innovation but also provides theoretical guidance for improving sealing materials and designing sealing systems.