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Erschienen in: Polymer Bulletin 7/2013

01.07.2013 | Original Paper

Synthesis of polysulfone-b-polystyrene block copolymers by mechanistic transformation from condensation polymerization to free radical polymerization

verfasst von: Cemil Dizman, Muhammet U. Kahveci, Yusuf Yagci

Erschienen in: Polymer Bulletin | Ausgabe 7/2013

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Abstract

Synthesis of polysulfone-b-polystyrene (PSU-b-PS) block copolymers by a combination of condensation polymerization and free radical polymerization processes are described. First, a new macroazoinitiator (MAI) containing polysulfone (PSU) units was prepared by direct esterification of 4,4-azobis(4-cyanopentanoic acid) with α,ω-hydroxyl PSU telechelics at ambient conditions. The macroinitiator was then used in conventional free radical polymerization of styrene leading to the formation of desired block copolymers. In this process, initiating macroradicals were generated by thermal cleavage of the azo group present in the macroazoinitiator structure. The precursor polysulfone macroazoinitiator (PSU-MAI) and resulting block copolymers were characterized by spectral analysis using FT-IR, 1H-NMR, GPC, TGA, and DSC.

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Metadaten
Titel
Synthesis of polysulfone-b-polystyrene block copolymers by mechanistic transformation from condensation polymerization to free radical polymerization
verfasst von
Cemil Dizman
Muhammet U. Kahveci
Yusuf Yagci
Publikationsdatum
01.07.2013
Verlag
Springer-Verlag
Erschienen in
Polymer Bulletin / Ausgabe 7/2013
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-013-0931-2

Weitere Artikel der Ausgabe 7/2013

Polymer Bulletin 7/2013 Zur Ausgabe

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