Some basic characteristics of rubber
1、Rubber-like elasticity
Unlike the elastic energy embodied in the coefficient of longitudinal elasticity (Young's modulus), rubber is a so-called "rubbery elasticity" that can be restored to hundreds of percent of deformation based on the entropic elasticity generated by the tightening and popping open of molecular locks.

2、Viscoelasticity of rubber
According to Hooke's Law, a so-called viscoelastic body has the property of being in the middle of an elastomer and a complete fluid. In other words, it shows the phenomenon of creep and stress relief in response to deformation caused by external force, etc., which is governed by time and temperature conditions.

3. Anti-vibration and cushioning
Rubber's softness, elasticity, and viscoelasticity interact with each other to show the role of sound and vibration transmission that can be mitigated.

4、It has a great dependence on temperature.
Not only rubber, but also polymer materials are generally affected by temperature, and rubber has a strong tendency to be viscoelastic and is greatly affected by temperature.

5. Characterized by electrical insulation
The same as plastics, rubber was originally an insulator. It is used in insulating skins, etc., and the electrical insulation characteristics are affected by the different formulations, and there is also "conductive rubber" that actively reduces the insulation resistance in order to prevent electrification.

6. Aging phenomenon
Compared with the corrosion of metals, wood, and stone, and the deterioration of plastics, the change in material due to the influence of environmental conditions is called the aging phenomenon in the field of rubber, and in general it is difficult to say that rubber is a material with excellent durability.

7、Need to add sulfur
The process of linking the chain polymers of rubber with sulfur, etc. is called sulfurization, and as a result of the reduction of plastic flow, the formability is improved, the physical properties such as strength are improved, and the range of the operating temperature is expanded, and the usability is also improved.

8, the need for formulations
Synthetic rubber, such as polyurethane, does not require a formula (in addition to cross-linking agent) is relatively exceptional, in general, rubber is required for a variety of formulas.

9. Other Properties
(a) Specific gravity
(b) Hardness
(c) Ventilation
(d) Water resistance
(e) Chemical resistance
(f) Abrasion resistance
(g) Fatigue resistance
(h) Strength
(i) Flame resistance
(j) Adhesion
(k) Toxicity