What is natural rubber? What is its source? Raw material
Early rubber was made from latex of rubber trees, rubber grass and other materials made of flexible, insulating, impermeable and air. High elastic polymer compound. Natural rubber is made from rubber, tree, rubber, grass and other plants. The synthetic rubber is obtained by polymerization of various monomers.
The Hevea tree offers the most commercial rubber. It hurt (such as stem bark was cut open) will secrete large amounts of SAP containing rubber emulsion.In addition, figs and other plants of the family Euphorbia can also provide rubber. Germany was trying to obtain rubber from these plants in the second world war because of the rubber supply being cut off, but later it was converted to synthetic rubber.The first rubber trees were grown in South America, but there were also large numbers of rubber trees in Southeast Asia after artificial transplants. In fact, Asia has become the most important source of rubber.Rubber made from silver gum reduces sensitivity.
The word "rubber" comes from the Indian language "cau-uchu", meaning "weeping tree"". Natural rubber is flowing out from the Hevea latex when tapping after solidification and drying process. In 1770, British chemist J. Priestley discovered that rubber could be used to erase pencil writing. The material used at that time was called rubber, which has been used so far. The molecular chain of rubber can be crosslinked, and the crosslinked rubber can recover quickly when it is deformed by external force, and has good physical and mechanical properties and chemical stability. Rubber is the basic raw material of rubber industry. It is widely used in making tyres, rubber hoses, tapes, cables and other kinds of rubber products.
