Question 1

Product Performance. How adaptable are ordinary, oil - resistant, acid - and - alkali - resistant, and special rubber sheets to different conditions?

Accepted Answer

What kind of working environment can ordinary rubber sheets adapt to? Ordinary rubber sheets are suitable for medium - pressure environments, with a working temperature range between - 30℃ and 70℃. They have excellent waterproof, shock - resistant, and sealing properties and can stably function in various conventional industrial scenarios. For example, they can be used for various sealing buffer rubber rings and gaskets, or as floor covering and decoration materials. How adaptable are oil - resistant rubber sheets to different types of oil media? Oil - resistant rubber sheets are specially designed for oil media such as engine oil, diesel oil, gasoline, and lubricating oil. Through formula optimization, they show excellent sealing and anti - expansion properties in these complex oil environments. Even under extreme temperature and pressure conditions, they can maintain stable performance, providing reliable protection for applications such as punching oil seals and seals and laying on workbenches and floors in contact with oil. To what extent does the acid - and alkali - resistant rubber sheet have acid - and alkali - resistant properties? The acid - and alkali - resistant rubber sheet has strong medium - resistant properties and can effectively resist the corrosion of acids and alkalis. It can be widely used for punching various seals and gaskets used in environments with acid and alkali corrosion, such as the pipeline and storage sealing protection of chemical enterprises and the desktop laying of laboratory workbenches, providing key protection for the safe and stable operation of equipment in related industries. What unique properties do special rubber sheets (such as silicone rubber sheets and fluororubber sheets) have? Silicone rubber sheets have excellent high - temperature and low - temperature resistance and can work under conditions of - 60℃ to 250℃. At the same time, they also have good electrical insulation and chemical stability and perform well in application scenarios such as electronic equipment sealing and high - temperature environment protection. Fluororubber sheets, with their excellent chemical corrosion resistance, high - temperature resistance (can work under conditions of - 20℃ to + 300℃), and low friction coefficient, play an important role in fields such as chemical pipeline sealing and automotive engine sealing. Moreover, their aging resistance, ozone resistance, oil resistance, high - vacuum resistance, and other properties are also very prominent.

Question 2

The molecular chains of industrial rubber are composed of a large number of repeating units.

Accepted Answer

Why does industrial  rubber have high elasticity?The high elasticity of industrial rubber is mainly determined by its molecular structure and intermolecular forces, as follows:Molecular chain structure: The molecular chains of industrial rubber are long - chain molecules formed by the connection of a large number of repeating units. These molecular chains have high flexibility and are not rigid - fixed, but can rotate and bend freely within a certain range. For example, the molecular chain of natural rubber contains a large number of carbon - carbon double bonds, which make the molecular chain have good flexibility.Molecular chain cross - linking: In the processing of rubber, a cross - linked structure is usually formed between molecular chains through processes such as vulcanization. Cross - linking can connect different molecular chains together to form a three - dimensional network structure. This cross - linked structure makes the rubber not slip relatively when it is stretched by an external force, but resists the external force through the elongation and deformation of the molecular chains. When the external force is removed, the molecular chains will return to their original state under the limitation of the cross - linking points, thus showing high elasticity.Intermolecular forces: There are certain intermolecular forces between rubber molecular chains, such as van der Waals forces. These forces can help the molecular chains interact with each other to resist the external force when the rubber is subjected to an external force. At the same time, after the force is removed, it also helps the molecular chains return to their original positions, which plays a certain auxiliary role in the elasticity of rubber.

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