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Divergent strategy for the synthesis of bottlebrush polymers via postpolymerization modification of macromonomer
Author(s) -
Lee Nam Joo,
Kim Dongseok,
Yoo Kwangho,
Yu Yeji,
Kim ByeongSu,
Kim Jeung Gon
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20200578
Subject(s) - macromonomer , romp , metathesis , acrylate , transesterification , polymerization , polymer chemistry , grafting , polymer , materials science , side chain , ring opening metathesis polymerisation , copolymer , chemistry , organic chemistry , catalysis
A simple and divergent synthetic strategy of bottlebrush polymers (BBPs) is presented, consisting of postpolymerization modification of a macromonomer and grafting‐through polymerization. Beginning with a single macromonomer, its direct modification could build a library of macromonomers with an identical chain length, thus guaranteeing the precision in the synthesis of BBPs. In this study, a newly designed norbornenyl‐terminated poly(methyl acrylate) (NB‐PMA) is proposed as a chemically robust template. Ti‐mediated transesterification of NB‐PMA successfully produces structurally diverse polyacrylates while maintaining the terminal norbornenyl group intact. All macromonomers obtained from transesterification possess a good grafting‐through ring‐opening metathesis polymerization reactivity, furnishing homo, random, and block BBPs in a controllable manner. Moreover, atomic force microscopy analysis supports the controlled side‐chain length distribution in the resulting BBPs.