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Polymer Bulletin
Erschienen in: Polymer Bulletin 7/2019

01.10.2018 | Original Paper

Synthesis of block copolymers through umpolung or treatment of propagating end of living cationic polytetrahydrofuran

verfasst von: Ryota Seto, Shuhei Yamada, Kozo Matsumoto, Takeshi Endo

Erschienen in: Polymer Bulletin | Ausgabe 7/2019

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Abstract

Block copolymers containing polytetrahydrofuran segments were synthesized by umpolung or propagating end of the cationic living polymer and successive anionic polymerization of methacrylates (RMAs) or radical polymerization of RMAs, acrylonitrile (AN), and styrene (St). Living polytetrahydrofuran (poly-THF) was prepared by cationic polymerization of tetrahydrofuran (THF), whose propagation end was reduced by samarium(II) iodide (SmI2). Anionic polymerizations of RMAs were conducted by addition of the monomers to the reduced poly-THF to obtain poly(THF-b-RMAs). On the other hand, the 2-bromoisobutyrate group, which can act as an initiator of radical polymerization, was introduced to the cationic propagating end of poly-THF by adding sodium 2-bromoisobutyrate. Block copolymers were synthesized by living radical polymerization of RMAs, St, or AN using the 2-bromoisobutyrate-capped poly-THF as a macroinitiator and copper(I) bromide (CuBr) as a catalyst.
Vorheriger Artikel Core–shell natural rubber and its effect on toughening and mechanical properties of poly(methyl methacrylate)
Nächster Artikel Rapid preparation and continuous processing of polylactide stereocomplex crystallite below its melting point

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Fußnoten
1
See supporting information.
 
2
Broad absorptions are observed at 557 and 618 nm for the divalent samarium derivatives [37, 38] and 363 nm for the trivalent ones.
 
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Metadaten
Titel
Synthesis of block copolymers through umpolung or treatment of propagating end of living cationic polytetrahydrofuran
verfasst von
Ryota Seto
Shuhei Yamada
Kozo Matsumoto
Takeshi Endo
Publikationsdatum
01.10.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 7/2019
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-018-2527-3

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