The most essential difference between plastic and rubber is that plastic deformation is plastic deformation, while rubber is elastic deformation. In other words, plastic is not easy to restore to its original state after deformation, while rubber is relatively easier. The elasticity of plastic is very small, usually less than 100%, while rubber can reach 1000% or more. Most of the plastic molding process is completed and the product process is completed, while the rubber molding process requires a vulcanization process.
Plastic and rubber are both polymer materials, which are mainly composed of carbon and hydrogen atoms, and some contain a small amount of oxygen, nitrogen, chlorine, silicon, fluorine, sulfur and other atoms. They have special properties and special uses. Plastics at room temperature It is solid, very hard, and cannot be stretched and deformed. The rubber is not high in hardness, elastic, and can be stretched to become longer. It can be restored to its original shape when it stops stretching. This is caused by their different molecular structures. Another difference is that Plastic can be recycled and reused many times, while rubber cannot be recycled directly. It can only be processed into reclaimed rubber before it can be used. The shape of plastic at more than 100 degrees to 200 degrees and the shape of rubber at 60 to 100 degrees. Similarly, plastic does not include rubber.
How to distinguish plastic from plastic?
From the touch point of view, the rubber has a soft, comfortable and delicate touch, and has a certain degree of elasticity, while the plastic is completely inelastic and has a certain degree of rigidity because it is harder and more brittle.
From the tensile stress-strain curve, plastic exhibits a higher Young’s modulus at the initial stage of tension. The strain curve has a steep rise, and then yields, elongation and fracture occur; rubber usually has a small deformation stage. An obvious stress rises, and then enters a gentle rise stage, until the stress-strain curve shows a steep rise zone when it is about to break
From a thermodynamic point of view, plastic is below the glass transition temperature of the material in the use temperature range, while rubber works in a highly elastic state above its glass transition temperature.
Post time: Dec-31-2021