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FPLC profile of chain extended multiblock polyHPMA. The dashed traces are the FPLC profiles of fractions obtained by SEC using a Superose 6 HR16/60 column. The legend indicates the main component. The multiblock polyHPMA contains about 17% monoblock, 40% diblock, and 34% tetrablock and 9% octablock and other multiblock polymers.
