But doesn't that happen in any other polymer? Thanks
monomers are in all polymers < everything has a different monomer
poly ( ETHEENE ) has ethene monomer
poly ( propene ) has propmene monemer
ethene and propene are the repeating units
in the case CONDESATION polymerisation
there is a repeating unit for nylon ( DIAMINE+ DICARBOXILYIC ACID )
there is a repeating unit for terylene ( DIOL + DICARBOXYILC ACID )