Rubber is well known as an essential material. This articlel explain in detail what is rubber and how many types are there.
In theoricial of the textbook, Rubber (French: caoutchouc) is a polymer material with high mechanical strength and high elastic deformability. In terms of it, or also known as a tree milk, is a flexible polymer, which is obtained from the sap of some plants or it can be man-made. The cultivation of it is mainly concentrated in the Southeast (Thailand, Malaysia, and Indonesia).
Nowadays, Rubber is a necessity good in our lives, and its texture is quite a highly elastic organic substance that can extend eight times its original length. They found traces of objects made from rubber trees three million years ago. In the matter of fact, both have many applications in creating products such as tires, gaskets, etc., and have gradually become important economic crops. To be mentioned, one of the big inventions is a pencil eraser for removing the marks, which was made from rubber after being introduced and found in the UK.
Types of Rubber
Nature rubber
Rubber belongs to the polyterpene type, with the molecular formula (C5H8)n.
Natural rubber extracted from rubber latex. The polymerization reaction carried out to form isoprene with almost no inclusions. This limits a performance of it. Additionally, the proportion of undesirable double bonds and minor impurities in the polymerization of natural rubber latex is still limited.
According to those reasons, the vulcanization of rubber has been improved but meanwhile the properties of natural rubber are somewhat impaired. In the latex containing hydrocarbons (90-95%), protein, sugar, and fatty acid resin, add acetic acid or fatty acid to the latex to make the rubber agglomerate and separate from the solution. Raw rubber is obtained by pressing, air-dried or fumigation. Natural rubber is polyisoprene with a cis configuration. Dues Adhesive is soft, the natural rubber easily promotes the temperature of the resin.
Synthetic rubber
Synthetic rubber is a kind of man-made plastic with stretch agent function. An elastic substance is a substance whose mechanical properties are more resistant to deformation pressure than most other substances, and can still return to its original shape. With a plenty of applications in experiment, synthetic rubber replaces natural rubber which plays a superior properties role in rubber industry
Synthetic rubber was produced through a single-structure condensation. Including isoprene (2-methyl-1, 3-butadiene), 1,3-butadiene, and chloroprene (2-chloro-1, 3-butadiene) and isobutylene (meth propylene). Isoprene is used for the percentage of chain bonds. In addition, these single structures could be mixed in a desired ratio to produce copolymerization, which results in neoprene structures with different physical, mechanical and chemical properties.
By the early 1960s, the output of synthetic rubber had exceeded that of natural rubber. There are many types of neoprene: polyisoprene (IR); polybutadiene (also known as Buna rubber abbreviation BR); styrene-butadiene copolymer (Buna-S rubber stands for SBR); Ethylene -Acetylene copolymer (EPDM); polyisobutylene (butyl); polychloroprene (chloroprene, abbreviated as CR); acrylonitrile-butadiene copolymer (nitrile rubber); polyacrylate polyurethane (PU); polysiloxane (silicone); …each kind has its own technical characteristics due to the difference in its structure and properties. Such as, Silicone resin is a recent high achievement because it has extremely high heat resistance and cold resistance.
In one word, rubber is generally being applied in our living stuff and being supportive materials. There are two types of it such as Natural rubber which are used in mattress production, hydroelectricity, medical industry, construction industry, ect. Synthetic rubber which is used in Rubber Roller, tired, mechanical industry, ect. The industry would apply it based on its neoprene features and characteristics to turn into a piece of product.
Understanding of Synthetic rubber in depth
A short timeline will be listed in order to understand in depth of how Synthetic rubber created and its reasons. To begin with in 1879, Bouchardt produced it in the laboratory through the polymerization of isoprene. At that time, British and German scientists developed other methods between 1910-1912 to produce plastics from isoprene. Germany is the first country to successfully commercialize synthetic rubber.
Therefore, the year of wheeled vehicles has been launched since the 1980s. The effects of rubber led to dramatically changed in demand. More than that, political issues also caused large fluctuations in the price of it, hence WW1 happened. With the shortage of NR, it switched to high demand of synthetic rubber. In the case of Bouchardt’s products, the structure of it is different from its original, which is based on butadiene polymerization. This result came from a laboratory study by the Russian scientist Sergei Lebedev. Till WW1 was over, scientists had made an invention of it named Buna S” (styrene-butadiene rubber) to replace NR after working hard in search of new SR materials and making processes. This product is the condensate of butadiene and styrene, which now accounts for half of the global synthetic rubber production.
Another period of time, since 1925, the price of natural rubber rose again, which caused many companies began to produce synthetic rubber products to compete with natural rubber products. In the United States, the focus of searching is on ingredients that are being studied outside of Europe. Thiokol started selling neoprene in 1930. Next year, as the results of Nieuwland laboratory, DuPont also sold similar rubber.
During WWII, the fascists controlled almost all the natural rubber supply source in the world-the Japanese Empire occupied East Asia, the production of synthetic rubber in the United States increased rapidly. Synthetic rubber was produced in applied because of its chemical resistance. The end of war, the synthetic rubber manufacturing process continued to undergo subtle improvements.
Choosing synthetic rubber is right?? Which ones we use ???
The recognition of characteristics and features of synthetic rubber is more appropriate to use in manufacturing. It is also a reason why Vietroll would choose SR to work on in the process of creating a spare part of the rice mill machine. Among select suppliers, we choose Kumho, a leading company which has produced a high-quality synthetic rubber in the rubber and chemical industry. Besides, due to our decades of research and development, NBR would be a great choice for us to work through a masterpiece of rice roller. Thereby, for beneficial side, our rubber product could enhance the stability and durability of rubber products over the product life cycle when in use; boost up rice yield in a more efficient way and less broken rice.
Check out this post for better understanding of applying synthetic rubber in rice rubber roller