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Answer

 polysters is a category of polymers that contain the ester functional group in their main chain.

Polyethylene terephthalate (PET) is formed by Polycondensation of terephthalic acid with ethylene glycol which are monomers.

 

Answer

polyester are synthetically formed substance which have properties like natural fibre 

they are more strong steady and beautiful than natural

they are also cheaper 

eg-raymond pants cloth is a polyester 

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