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

Cemil Dizman; Muhammet U. Kahveci; Yusuf Yagci

doi:10.1007/s00289-013-0931-2

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

Cemil Dizman, Muhammet U. Kahveci, Yusuf Yagci^*

^*Corresponding author for this work

Department of Chemistry

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

14 Citations (Scopus)

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.

Original language	English
Pages (from-to)	2097-2109
Number of pages	13
Journal	Polymer Bulletin
Volume	70
Issue number	7
DOIs	https://doi.org/10.1007/s00289-013-0931-2
Publication status	Published - Jul 2013

Funding

The authors thank Istanbul Technical University Research Fund and the State Planning Organization of Turkey (DPT) (Project No: 2005K120920) for the financial support.

Funders	Funder number
DPT	2005K120920
Istanbul Technical University Research Fund
State Planning Organization of Turkey

Keywords

Block copolymer
Condensation polymerization
Free radical polymerization
Macroazoinitiator
Polystyrene
Polysulfone

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10.1007/s00289-013-0931-2

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

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.",

keywords = "Block copolymer, Condensation polymerization, Free radical polymerization, Macroazoinitiator, Polystyrene, Polysulfone",

author = "Cemil Dizman and Kahveci, {Muhammet U.} and Yusuf Yagci",

year = "2013",

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T1 - Synthesis of polysulfone-b-polystyrene block copolymers by mechanistic transformation from condensation polymerization to free radical polymerization

AU - Dizman, Cemil

AU - Kahveci, Muhammet U.

AU - Yagci, Yusuf

PY - 2013/7

Y1 - 2013/7

N2 - 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.

AB - 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.

KW - Block copolymer

KW - Condensation polymerization

KW - Free radical polymerization

KW - Macroazoinitiator

KW - Polystyrene

KW - Polysulfone

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SN - 0170-0839

VL - 70

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JO - Polymer Bulletin

JF - Polymer Bulletin

IS - 7

ER -

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

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