Synthesis of block copolymers by transformation of photosensitized cationic polymerization to stable free radical polymerization

Tuba Girgin Yildirim; Yeşim Hepuzer; Gürkan Hizal; Yusuf Yaǧci

doi:10.1016/S0032-3861(98)00633-8

Synthesis of block copolymers by transformation of photosensitized cationic polymerization to stable free radical polymerization

Tuba Girgin Yildirim, Yeşim Hepuzer, Gürkan Hizal, Yusuf Yaǧci^*

^*Corresponding author for this work

Department of Chemistry

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

Anthracene-photosensitized cationic polymerization of cyclohexene oxide at λ = 350 nm in conjunction with onium salts, namely N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP⁺PF₆ ^-) or diphenyliodonium hexafluorophosphate (Ph₂I⁺PF₆ ^-), in the presence of a stable radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), yielded polymers with alkoxyamine terminal groups. These polymers were found to be efficient initiators for stable free radical polymerization (SFRP) of styrene. IR, ¹H-NMR spectral analysis and GPC studies of the obtained polymers show that block copolymers are readily formed as a result of combination of photosensitized cationic and stable free radical polymerization mechanisms.

Original language	English
Pages (from-to)	3885-3890
Number of pages	6
Journal	Polymer
Volume	40
Issue number	13
DOIs	https://doi.org/10.1016/S0032-3861(98)00633-8
Publication status	Published - Jun 1999

Funding

Financial support from Istanbul Technical University Research Fund and Turkish State Planing Association (DPT) is gratefully acknowledged.

Funders	Funder number
DPT
Turkish State Planing Association
Istanbul Teknik Üniversitesi

Keywords

Photosensitized cationic polymerization
Stable free radical polymerization
Transformation reactions

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10.1016/S0032-3861(98)00633-8

Cite this

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title = "Synthesis of block copolymers by transformation of photosensitized cationic polymerization to stable free radical polymerization",

abstract = "Anthracene-photosensitized cationic polymerization of cyclohexene oxide at λ = 350 nm in conjunction with onium salts, namely N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP+PF6 -) or diphenyliodonium hexafluorophosphate (Ph2I+PF6 -), in the presence of a stable radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), yielded polymers with alkoxyamine terminal groups. These polymers were found to be efficient initiators for stable free radical polymerization (SFRP) of styrene. IR, 1H-NMR spectral analysis and GPC studies of the obtained polymers show that block copolymers are readily formed as a result of combination of photosensitized cationic and stable free radical polymerization mechanisms.",

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author = "Yildirim, {Tuba Girgin} and Ye{\c s}im Hepuzer and G{\"u}rkan Hizal and Yusuf Yaǧci",

year = "1999",

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doi = "10.1016/S0032-3861(98)00633-8",

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T1 - Synthesis of block copolymers by transformation of photosensitized cationic polymerization to stable free radical polymerization

AU - Yildirim, Tuba Girgin

AU - Hepuzer, Yeşim

AU - Hizal, Gürkan

AU - Yaǧci, Yusuf

PY - 1999/6

Y1 - 1999/6

N2 - Anthracene-photosensitized cationic polymerization of cyclohexene oxide at λ = 350 nm in conjunction with onium salts, namely N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP+PF6 -) or diphenyliodonium hexafluorophosphate (Ph2I+PF6 -), in the presence of a stable radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), yielded polymers with alkoxyamine terminal groups. These polymers were found to be efficient initiators for stable free radical polymerization (SFRP) of styrene. IR, 1H-NMR spectral analysis and GPC studies of the obtained polymers show that block copolymers are readily formed as a result of combination of photosensitized cationic and stable free radical polymerization mechanisms.

AB - Anthracene-photosensitized cationic polymerization of cyclohexene oxide at λ = 350 nm in conjunction with onium salts, namely N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP+PF6 -) or diphenyliodonium hexafluorophosphate (Ph2I+PF6 -), in the presence of a stable radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), yielded polymers with alkoxyamine terminal groups. These polymers were found to be efficient initiators for stable free radical polymerization (SFRP) of styrene. IR, 1H-NMR spectral analysis and GPC studies of the obtained polymers show that block copolymers are readily formed as a result of combination of photosensitized cationic and stable free radical polymerization mechanisms.

KW - Photosensitized cationic polymerization

KW - Stable free radical polymerization

KW - Transformation reactions

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Synthesis of block copolymers by transformation of photosensitized cationic polymerization to stable free radical polymerization

Abstract

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Keywords

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