Abstract
We have developed a new iterative methodology using α-chain-end-functionalized living AB diblock copolymer anion as a key building block in order to synthesize a series of well-defined (AB)n multiblock copolymers composed of polystyrene (PS) and poly(methyl methacrylate) (PMMA). The methodology involves the following three reaction steps in the entire iterative synthetic sequence: (1) a sequential living anionic block copolymerization to prepare α-chain-end-functionalized living AB diblock copolymer anion with the 3-tert-butyldimethylsilyloxypropyl (SiOP) group, (2) an introduction of α-phenyl acrylate function (PA) via the SiOP group by deprotection followed by Mitsunobu esterification, and (3) a linking reaction of α-chain-end-PA-functionalized AB diblock copolymer with α-chain-end-SiOP-functionalized living AB diblock copolymer anion. The same iterative synthetic sequence involving the three reaction steps was repeated several times to successively synthesize a series of (AB)n multiblock copolymers (n ...
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