How is terylene prepared?
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When the monomers get together a small amount of molecule lost its value.
But in polythene when different from addition polymerisation which produces polymers, nothing is lost when the monomers join together in this case.
The acid is benzene-1,4-dicarboxylic acid (old name: terephthalic acid).
The alcohol is ethane-1,2-diol (old name: ethylene glycol).
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