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What are the sequence of steps involved in the manufacture of carbon fibre?(a) Cooling-Carbonization-Graphitization(b) Graphitization-Carbonization-Cooling(c) Heating-Carbonization-Graphitization(d) Graphitization-Carbonization-HeatingThis question was posed to me during a job interview.This is a very interesting question from Polymerization topic in chapter Polymerization Industries of Chemical Technology

Answer»

The CORRECT choice is (c) Heating-Carbonization-GRAPHITIZATION

For explanation: The PAN fibres are first preheated to 300°C and the undergoes carbonization at 1600°C TILL a high strength carbon fibre is formed. Finally, it undergoes graphitization at TEMPERATURE up to 3000°C.



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