Question

Name the most important synthetic rubber?

please write clearly

Answer 1

Answer :

What is synthetic rubber ?

Rubber in its native form is basically useless. It is only when certain chemicals are added, the rubber thus produced is used to make varied rubber products. Synthetic rubber is used as a substitute for natural rubber in many cases. Depending on the chemicals added and the properties associated with it, the synthetic rubber can be as hard as a bowling ball or as resilient as a rubber band or as soft as a sponge. When improved material properties are required, synthetic rubber is considered. Approximately 70% of all rubber used today are one from many synthetic rubber varieties.

Synthetic rubber is a man-made rubber which is produced in manufacturing plants by synthesizing it from petroleum and other minerals.Synthetic rubber is basically a polymer or an artificial polymer. It has the property of undergoing elastic stretchability or deformation under stress but can also return to its previous size without permanent deformation.

Types of synthetic rubber :

There are about twenty different types of chemicals used for making different synthetic rubber varities. It is obvious that there are different synthetic rubber kinds. Some of the popular synthetic rubber types include the following.   

• Acrylic Rubber (ACM)
• Butadiene Rubber (BR)
• Butyl Rubber (IIR)
• Chlorosulfonated Polyethylene (CSM)/ Hypalon
• Ethylene Propylene Diene Monomer (EPDM)
• Fluoroelastomers (FKM)/ Viton
• Isoprene Rubber (IR)
• Nitrile Rubber (NBR)
• Perfluoroelastomer (FFKM)
• Polychloroprene (CR)/ Neoprene
• Polysulfide Rubber (PSR)
• Silicone Rubber (SiR)
• Styrene Butadiene Rubber (SBR)

What is the most important synthetic rubber ?

  The most prevalent synthetic rubbers are styrene-butadiene rubbers (SBR) derived from the copolymerization ofstyrene and 1,3-butadiene.The first step involved in the process is to let styrene and butadiene react together. The new synthetic rubber that was formed consists of about 25% styrene, with butadiene making up the rest, which in principle had the same properties as natural rubber. These rubber is considered to be the highest volume general purpose and the most common type of synthetic rubber.

  This is the most widely used synthetic rubber. Many trials were made to produce a artificial or man-made rubber. The first synthetic rubber could not match natural rubber, but in due course of time 14 other rubber types were developed, having properties comparable with natural rubber or even better. Styrene-butadiene rubber or SBR, the most common and cheapest type of synthetic rubber, is as an example of the manufacturing principles.

  

Properties of Styrene Butadiene Rubber

• This type of rubber is usually very weak unless reinforcing fillers are incorporated. With suitable fillers, this becomes a strong rubber.
• It has similar chemical and physical properties like natural rubber.
• It has better abrasion resistance.
• It has poorer fatigue resistance.
• Heat resistance is better than natural rubber.
• Low temperature flexibility and tensile strength are less than that of natural rubber.

Applications of Styrene Butadiene Rubber

This is the most widely used synthetic rubber.This rubber is used in many of the same products as natural rubber. SBR is also used to cover different types of hose and in a number of other products. It is used in tyre and tyre products which also includes tread rubber and this accounts for 76% of global consumption. Other uses of SBR include mechanical goods, automotive, miscellaneous, including adhesives, floor tile and shoe soles etc. Adhesives and chewing gum have also been identified as two growing markets for styrene-butadiene applications.