In the process of vulcanizing sulfur rubber, rubber is obtained. During vulcanization, the rubber macromolecules are crosslinked by sulfur "bridges". When heated, rubber can soften, and when cooled, it becomes brittle. Organic solvents acting on the rubber soften it and cause it to swell. Rubber is resistant to solvents, it retains elasticity at high and low temperatures.
Rubber - polymer, high molecular weight substance. The basis of rubbers is diene hydrocarbons. There are synthetic and natural rubber.
Rubber is an elastic material obtained during the vulcanization of rubber. Depending on the degree of vulcanization, rubbers are classified into hard, semi-hard and soft.
First of all, rubber and rubber differ in quantitative composition, and hence in properties. To obtain rubber from rubber, accelerators (magnesium and lead oxides, polysulfides), agents (sulfur, peroxides and selenium), softeners and antioxidants, active and inactive fillers, plasticizers and other additives with a specific purpose are introduced into it, which improve the quality characteristics of the material.
Rubber is a cross-linked polymer capable of straightening and folding back under the action of various mechanical loads and under tension. Rubber is a cross-linked macromolecule that cannot melt when heated and crystallize when cooled.
Rubber, unlike rubbers, is the most versatile material. It retains its physical and mechanical properties over a wide temperature range. Its properties primarily depend on the type of rubber used for production. Rubber is characterized by the ability to significant deformations, high elasticity and heat resistance, low compressibility, chemical resistance, increased wear resistance, water resistance and low density.
Rubber, interacting with oxygen and other oxidizing reagents, rapidly ages. At high temperatures it decomposes, and at low temperatures, losing its plasticity, it becomes brittle.
- High and low temperatures are not able to deteriorate the elasticity of rubber - its most important characteristic.
- Rubber is not afraid of deformation, moisture, exposure to aggressive chemicals.