The natural rubber we usually refer to is a solid substance made from natural rubber latex collected from rubber trees and processed through processes such as solidification and drying. Natural rubber is a natural polymer compound mainly composed of polyisoprene, with a molecular formula of (C5H8) n. Its rubber hydrocarbon (polyisoprene) content is over 90%, and it also contains small amounts of protein, fatty acids, sugar, and ash.
The physical properties of natural rubber. Natural rubber has high elasticity and slight plasticity at room temperature, with excellent mechanical strength, low hysteresis loss, and low heat generation during multiple deformations. Therefore, its bending and flexibility are also good, and because it is non-polar rubber, its electrical insulation performance is good.
Rubber, together with plastic and fiber, is one of the three major synthetic materials and is a high polymer material with high elasticity and high elasticity. The first characteristic of rubber is that its elastic modulus is very small and its elongation is high. Secondly, it has excellent resistance to breathability, as well as resistance to various chemical media and electrical insulation. Some special synthetic rubbers have better oil and temperature resistance, and can resist the swelling of fatty oil, lubricating oil, hydraulic oil, fuel oil, and solvent oil; Cold resistance can be as low as -60 ℃ to -80 ℃, and heat resistance can be as high as+180 ℃ to+350 ℃. Rubber is also resistant to various types of bending and deformation due to its low hysteresis loss. The third characteristic of rubber is that it can be used in combination, blended, and composite with various materials, and thus modified to obtain good comprehensive properties.
