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BACKGROUNDBlock copolymers can be effective extractants in solid–liquid two‐phase partitioning bioreactors (TPPBs) when selected on the basis of their partition coefficient toward target solutes, and their thermo‐mechanical properties. A series of Pebax® block copolymers, containing varying proportions of soft poly(tetramethylene oxide) and hard poly(amide‐12), was evaluated to determine the effect of hard segment proportion on solute affinity toward two biotransformation target molecules, carveol and carvone. Subsequently, representative homopolymers comprising the copolymers' soft segment were examined individually for the effects of molecular weight, crystallinity, and polymer end group polarity on affinity...
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