Q. 195.0( 1 Vote )

Write the structu

Answer :

Dacron : dacron is prepared by a condensation reaction between dimethylterephthalate and ethylene glycol in presence of a catalyst consisting of mixture of zinc acetate and antimony trioxide at temperature 425-475K. methanol is eliminated during condensation.


terylene (dacron )


Dimethylterephthalate ethylene glycol


Melamine- formaldehyde polymer


Melamine formaldehyde polymer is manufactured by the condensation polymerisation of melamine and formaldehyde.


melamine formadehyde


copolymer


Melamine formaldehyde


Buna – N


Buna –N is obtained by the copolymerisation of 1, 3 – butadiene and acrylonitrile in the presence of a peroxide catalyst.



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