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(a) GPC characterization of mPEG45-OH as the ROP macroinitiator, PEG-b-APCL (2), and PEG-b-CPCL-70 (3) with DMF as eluent. (b) GPC curves of 3 after incubation at pH 5.5 PBS buffer at 37 °C. (c) GPC curves of 3 after incubation at pH 7.4 PBS buffer at 37 °C.
