Rubber is divided into natural rubber and synthetic rubber, natural rubber structure is the polymer of isoprene, synthetic rubber such as butadiene rubber, neoprene rubber, styrene butadiene rubber and so on. As a kind of rubber, silicone has the characteristics of high and low temperature resistance, weather resistance, ozone resistance, non-toxic and environmental protection. Silicone and rubber can not say which is good, can only say that the application is good in the right aspect. The following details the difference between silicone and rubber.
The difference between rubber and silicone
Rubber is divided into natural rubber and synthetic rubber, natural rubber structure is the polymer of isoprene, synthetic rubber such as butadiene rubber, neoprene rubber, styrene butadiene rubber and so on. When the cross-linked rubber is deformed by external force, it has the ability to recover quickly, and has good physical and mechanical properties and chemical stability.
Silicone rubber is mainly composed of linear polysiloxanes with high molar mass. Si-O-Si bond is its basic bond type, silicon atoms are mainly connected to methyl groups, a very small amount of unsaturated groups are introduced into the side chain, the intermolecular force is small, the molecule has a spiral structure, and methyl groups are arranged outward and can rotate freely, so silicone rubber has excellent resistance to high and low temperatures (-100~315℃) after vulcanization. Weather resistance, hydrophobicity, electrical insulation, physiological inertia, etc., have been widely used in national defense, medical and health, industrial and agricultural production and People's Daily life. The most important thing is that it is not toxic, such as pacifiers, breast implants commonly used.
1. The scope of the two definitions is different. Rubber is a general term that includes many types, such as natural rubber, butadiene rubber, styrene butadiene rubber, propylene rubber, of course, also includes silicone rubber; Silicone is one of the specific varieties of rubber.
2, the use of rubber is very wide, mainly the use of rubber elastic effect, such as rubber tires, bridge shock absorption, rubber hose roller, etc., mainly in industrial applications; Silica gel is mostly used in food appliances, such as pacifiers, children's spoons, voltage pot seals and so on.
3, different types and grades of rubber applications are not the same, such as natural rubber is mainly used to make tires, butyl rubber is mainly used to make inner tubes, EPDM rubber to make sealing products.
4, in the selection of rubber, it is necessary to meet the requirements of specific performance indicators, such as hardness, tensile strength, compression deformation, wear, tear, use environment, etc. From their nature, we can see that silicone rubber has unparalleled advantages of ordinary rubber, silicone rubber is more expensive, which is better, depends on our use, if ordinary rubber products can meet our needs, there is no need to kill chickens with cows, the use of better performance, higher prices of silicone.
