Polyesters
Polyesters
Formula
n HOOC−R−COOH + n HO−R'−OH → (−CO−R−CO−O−R'−O−)ₙ + n H₂O
Real World
PET (polyethylene terephthalate), made from terephthalic acid and ethane-1,2-diol, is the plastic used in Coca-Cola bottles and is widely recycled across UK kerbside schemes.
Exam Focus
Circle the ester linkage −COO− in the repeat unit and label both monomer residues to secure full marks.
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