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Schematic illustration of PEEK surface functionalization. (A) At first, keto group reduction was performed. (B) Then, atom transfer radical polymerization (ATRP) initiator (2-BiBr) was attached. (C) Subsequently, SI-ATRP of MPS, MeOEGMA, and N-isopropylacrylamide (NIPAM) was carried out. Reprinted with permission from Reference [58], ACS 2009.
