A New Synthetic Strategy for Polymeric Bromine Precursors: One‐Step Change from Bromine‐Containing Polymers to Functional Polymers. Issue 4 (15th January 2021) - Yu, Gang
Abstract: Postmodification methods are effective tools in preparing functional polymers, and novel end‐group reactions have attracted much attention from researchers for postmodification applications. Here, a new high‐efficiency postmodification method is proposed, which can change bromine‐containing polymers to functional polymers in one step. Phenol, 1‐hydroxynaphthalene, and 4‐(2‐phenyldiazenyl)‐phenol (AzoOH) are successfully grafted onto the polymeric branch chain of bromine‐containing polymers, i.e., homopolymer, bromoethyl methyl acrylate, (pBMEA) and amphiphilic block copolymer p(BMEA)‐ b ‐p(mPEG), with a high grafting rate that is near 100%. Also, the micelles of the postmodified amphiphilic block copolymer p(BMEA‐Azo)‐ b ‐p(mPEG) are broken up under ultraviolet irradiation. The proposed method can be used as a platform to prepare a variety of stimuli‐responsive polymeric nanoparticles. Abstract : A high‐efficiency postmodification method is proposed, which can produce the functional polymers from bromine‐containing polymers in one step. Phenol, 1‐hydroxynaphthalene, and 4‐(2‐phenyldiazenyl)‐phenol (AzoOH) are successfully grafted onto the polymeric branch chain of bromine‐containing polymers, with a grafting rate near 100%. Also, the micelles of the postmodified amphiphilic block copolymer p(BMEA‐Azo)‐ b ‐p(mPEG) cracks after ultraviolet irradiation.