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T2-PRESENTATIONTopic- Synthetic Rubber Faculty: Dr. M. Y. Khaladkar Course: Polymer Technology

Presented By,Tambade Priya A. (MIS-141210021)Wagadkar Samadhan K. (MIS-141210022)

IntroductionSynthetic rubber, invariably apolymer, is any type of artificialelastomer ,mainly synthesised from petroleum byproducts. Synthetic elastomers are produced on an industrial scale in either solution or emulsion polymerization methods. Polymers made in solution generally have more linear molecules (that is, less branching of side chains from the main polymer chain), and they also have a narrower distribution of molecular weight and flow more easily. In addition, the placement of the monomer units in the polymer molecule can be controlled more precisely when polymerization is conducted in solution. Natural vs. synthetic rubber

Chemical ReactionThe most prevalent synthetic rubbers arestyrene-butadiene rubbers(SBR) derived from thecopolymerization ofstyreneand butadiene. Other synthetic rubbers are prepared fromisoprene(methyl-butadiene),chloroprene(chloro,-butadiene), and isobutylene (methylpropene) with a small percentage of isoprene forcross-linking. These and other monomers can be mixed in various proportions to becopolymerized to produce products with a range of physical, mechanical, and chemical properties. The monomers can be produced pure and the addition of impurities or additives can be controlled by design to give optimal propertiesChemical Reaction

Trade names1.Buna S2. Hypalon3.Kalrez4. Chemraz5.Neoprene6.Silastic7.Tecnoflon8.VitonTypes of Synthetic RubberAcrylic Rubber (ACM)Butadiene Rubber (BR)Butyl Rubber (IIR)Chloro sulfonated Polyethylene (CSM)/ HypalonEthylene Propylene Diene Monomer (EPDM)Fluoro elastomers (FKM)/ VitonIsoprene Rubber (IR)Nitrile Rubber (NBR)Perfluoro elastomer (FFKM)Polychloroprene (CR)/ NeoprenePolysulfide Rubber (PSR)Silicone Rubber (SiR)Styrene Butadiene Rubber (SBR)

Properties :

There are different varieties of synthetic rubber, each having their unique properties. Some of the commonproperties of synthetic rubberare as follows:

Better abrasion resistanceGood ElasticityBetter heat and aging resistanceElectrical insulation materialFlexible at low temperaturesFlame retardantResistant to grease& oil etc.Has the ability to form long polymeric chains

Main synthetic rubber production system

Applications :

Like natural rubber, synthetic rubber has a varied range of applications, such as follows:Tire industry (car, aircraft and bicycle tires)Drive beltsHosesMedical equipmentSealsFloor coveringsConveyor beltsMolded parts etc.

10References-http://www.iisrp.com/WebPolymers/00Rubber_Intro.pdfwww.wikipedia.comwww.google.comwww.isrl.comwww.qsr-inc.com