Premium
Versatile cobalt complexes for initiating immortal ring‐opening polymerization (ROP) of lactide (LA), mediating living radical polymerization of t ‐butyl acrylate ( t BA) and catalyzing copolymerization of LA and t BA by combination of ROP and organometallic‐mediated radical polymerization
Author(s) -
Zhang Jianing,
Wang Baolong,
Wang Liying,
Sun Junmin,
Zhang Yongfeng,
Cao Zhenzhu,
Wu Zhenqiang
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4077
Subject(s) - copolymer , cobalt , chemistry , polymer chemistry , polymerization , methyl acrylate , acrylate , living polymerization , monomer , catalytic chain transfer , ring opening polymerization , catalysis , living free radical polymerization , radical polymerization , polymer , organic chemistry
Low‐cost, highly active and versatile amino‐bis(phenolate) cobalt complexes are developed. The cobalt complexes can control living polymerization of different categories of monomers including lactide (LA) by immortal ring‐opening polymerization in argon and even in air and acrylate via living radical polymerization (LRP). The cobalt‐based catalysts were used for copolymerization of LA and acrylate. The immortal polymerization of LA using the cobalt complexes as initiators proceeds in argon and even in air and without the requirement for extensive drying techniques or inert atmosphere whilst retaining end‐group fidelity. The cobalt complexes are used to mediate LRP of t ‐butyl acrylate ( t BA) in methanol. The block copolymerization of LA and t BA catalyzed by single‐site cobalt organometallic catalyst is also reported for the first time. This cobalt system offers a versatile and green way to produce homopolymers and block copolymers.