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(a) Magnified 1H NMR spectra and (b) SEC/UV-RI chromatograms of VP5611 and RPs recovered from PPO-based PUF by aminolysis with different amounts of TREN. The solid and dashed curves in the SEC/UV-RI chromatograms represent the RI and UV detector responses, respectively, while the dotted lines show the molar mass as a function of elution volume.
