Tandem Living Insertion and Controlled Radical Polymerization for Polyolefin-Polyvinyl Block Copolymers.
Block Copolymer
Functionalization
Living Polymerization
Polyolefin
Radical Coupling
Journal
Angewandte Chemie (International ed. in English)
ISSN: 1521-3773
Titre abrégé: Angew Chem Int Ed Engl
Pays: Germany
ID NLM: 0370543
Informations de publication
Date de publication:
01 03 2022
01 03 2022
Historique:
received:
18
09
2021
pubmed:
31
12
2021
medline:
31
12
2021
entrez:
30
12
2021
Statut:
ppublish
Résumé
Practical synthesis of polyolefin-polyvinyl block copolymers remains a challenge for transition-metal catalyzed polymerizations. Common approaches functionalize polyolefins for post-radical polymerization via insertion methods, yet sacrifice the livingness of the olefin polymerization. This work identifies an orthogonal radical/spin coupling technique which affords tandem living insertion and controlled radical polymerization. The broad tolerance of this coupling technique has been demonstrated for diverse radical/spin traps such as 2,2,5-trimethyl-4-phenyl-3-azahexane-3-nitroxide (TIPNO), 1-oxyl-(2,2,6,6-tetramethylpiperidine) -4-yl-α-bromoisobutyrate (TEMPO-Br), and N-tert-butyl-α-phenylnitrone (PBN). Subsequent controlled radical polymerization is demonstrated with nitroxide-mediated polymerization (NMP) and atom transfer radical polymerization (ATRP), yielding polyolefin-polyvinyl di- and triblock copolymers (Đ<1.3) with acrylic, vinylic and styrenic segments. These findings highlight radical trapping as an approach to expand the scope of polyolefin-functionalization techniques to access polyolefin macroinitiators.
Identifiants
pubmed: 34967088
doi: 10.1002/anie.202112742
doi:
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e202112742Informations de copyright
© 2021 Wiley-VCH GmbH.
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