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Course Postgraduate
Semester Electives
Subject Code CHM874
Subject Title Rubber Technology

Syllabus

Introduction to Rubbers and elastomers; Manufacture, structure, properties and applications of Natural Rubber, Synthetic rubbers like SBR, Butyl rubber, EPDM, Hypalon, nitrile rubber etc; Chemistry and technology of rubber vulcanization; Rubber compounding, additives used in rubber compounding; General compound design, kinetics of vulcanization; Assessment of curing; Compression, transfer, extrusion, calendering and injection moulding of rubbers; Manufacturing,  testing and recycling of rubber products.

 

Detailed Version

Introduction to Rubbers and elastomers: Elastic nature, Basic theory of rubber elasticity, Elasticity of single molecule and three dimensional network etc

Natural rubber and synthetic rubbers: Manufacture, structure, properties and applications of Polyisoprenes, styrene butadiene rubber, Butyl rubber, EPDM, Hypalon, silicones, butyl rubber and halobutyl rubber, nitrile rubber, thermoplastics elastomers, latex and foam rubber.

Compounding of Rubbers: Chemistry and technology of rubber vulcanization, mastication, rubber compounding, additives used in rubber compounding: Vulcanizates, Fillers - reinforcing and non-black fillers, plasticizers, peptizers, accelerators, activators, softeners, anti aging additives, colorants, flame retarders, blowing agents, deodorants, abrasive, retarders etc.. Machineries used for mixing- Mixing mills, internal mixers, baneberry mixers etc

Curing process of rubber compounds: General compound design, kinetics of vulcanization, chemical reactions, factors affecting rate of vulcanization etc. Assessment of curing -Viscometers, Capillary Rheometers, Rotational Rheometers and plastometers.

Moulding Technology: Compression, transfer, extrusion, calendering and injection moulding of rubbers.

Manufacturing technology: Manufacturing of products such as tyres, tubes, conveyor belts and flat belts, cellular products, hose technology, cables, footwear and latex goods, rubbers used in power transmission, O-rings, gaskets and seals

Testing of raw rubbers, compounds and rubber products, Recycling of rubber products 

Text Books

1.        Maurice Morton, Rubber Technology, Academic Publishers, 2010

2.        C M Blow, Rubber Technology and Manufacture, Butterworth-Heinmann, 2nd Edition, 1982.

3.        Werner Hoffmann, Rubber Technology Handbook, HANSER Publishers, 1989

References

1.        Bredan Rodgers, Rubber Compounding Chemistry and Application, CRC Press; 1st ed. 2004

2.        G. S. Whitby, Synthetic Rubber, Wiley, New York, 1954

3.        John S. Dick, R. A. Annicelli,Rubber Technology: Compounding and Testing for Performance, Hanser Publishers, 2001