12th Class Chemistry Polymers / बहुलक

  • question_answer 25)
    How is Dacron obtained from ethylene glycol and terephthalic acid? Formula of ethylene glycol is  and of terephthalicacid . The process involves condensation polymerization. i.e., removal of water.  

    Answer:

    Dacron or terylene (a polyester) is formed by thecondensation polymerization of ethylene glycol and terephthalic acidwith the elimination of water molecule. The reaction takes place at420-460 K temperature in presence of zinc acetate and antimonytrioxide as a catalyst.      


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