Synthesis and properties of polyimide ionomers containing sulfoalkoxy and fluorenyl groups

Tomohiro Yasuda; Kenji Miyatake; Michiko Hirai; Masato Nanasawa; Masahiro Watanabe

doi:10.1002/pola.20843

Synthesis and properties of polyimide ionomers containing sulfoalkoxy and fluorenyl groups

Tomohiro Yasuda, Kenji Miyatake, Michiko Hirai, Masato Nanasawa, Masahiro Watanabe^*

^*Corresponding author for this work

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

64 Citations (Scopus)

Abstract

A series of sulfopropylated and sulfobutylated polyimide copolymers containing fluorenyl groups, SPI-4, were synthesized to investigate the effect of alkyl side chains on the properties (stability, mechanical strength, water uptake, and proton conductivity) of the polymimide electrolyte membranes. SPI-4 showed much better hydrolytic stability (in 10% MeOH aq at 100°C) than the main chain sulfonated polyimide, SPI-1. Tough, flexible, and ductile membranes were obtained from these copolymers. At high relative humidity all the SPI-4 membranes showed high mechanical properties (>34 MPa of the maximum stress) and proton conductivity (>0.1 Scm^-1). These properties are comparable to or even better than those of the perfluorosulfonic acid ionomer (Nafion 112). The new polyimide ionomers have proved to be a possible candidate as polymer electrolyte membrane for PEFCs and DMFCs.

Original language	English
Pages (from-to)	4439-4445
Number of pages	7
Journal	Journal of Polymer Science, Part A: Polymer Chemistry
Volume	43
Issue number	19
DOIs	https://doi.org/10.1002/pola.20843
Publication status	Published - 2005 Oct 1
Externally published	Yes

Keywords

Conducting polymers
Ionomers
Membranes
Polyimides
Proton conduction

ASJC Scopus subject areas

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.1002/pola.20843

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title = "Synthesis and properties of polyimide ionomers containing sulfoalkoxy and fluorenyl groups",

abstract = "A series of sulfopropylated and sulfobutylated polyimide copolymers containing fluorenyl groups, SPI-4, were synthesized to investigate the effect of alkyl side chains on the properties (stability, mechanical strength, water uptake, and proton conductivity) of the polymimide electrolyte membranes. SPI-4 showed much better hydrolytic stability (in 10% MeOH aq at 100°C) than the main chain sulfonated polyimide, SPI-1. Tough, flexible, and ductile membranes were obtained from these copolymers. At high relative humidity all the SPI-4 membranes showed high mechanical properties (>34 MPa of the maximum stress) and proton conductivity (>0.1 Scm-1). These properties are comparable to or even better than those of the perfluorosulfonic acid ionomer (Nafion 112). The new polyimide ionomers have proved to be a possible candidate as polymer electrolyte membrane for PEFCs and DMFCs.",

keywords = "Conducting polymers, Ionomers, Membranes, Polyimides, Proton conduction",

author = "Tomohiro Yasuda and Kenji Miyatake and Michiko Hirai and Masato Nanasawa and Masahiro Watanabe",

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doi = "10.1002/pola.20843",

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T1 - Synthesis and properties of polyimide ionomers containing sulfoalkoxy and fluorenyl groups

AU - Yasuda, Tomohiro

AU - Miyatake, Kenji

AU - Hirai, Michiko

AU - Nanasawa, Masato

AU - Watanabe, Masahiro

PY - 2005/10/1

Y1 - 2005/10/1

N2 - A series of sulfopropylated and sulfobutylated polyimide copolymers containing fluorenyl groups, SPI-4, were synthesized to investigate the effect of alkyl side chains on the properties (stability, mechanical strength, water uptake, and proton conductivity) of the polymimide electrolyte membranes. SPI-4 showed much better hydrolytic stability (in 10% MeOH aq at 100°C) than the main chain sulfonated polyimide, SPI-1. Tough, flexible, and ductile membranes were obtained from these copolymers. At high relative humidity all the SPI-4 membranes showed high mechanical properties (>34 MPa of the maximum stress) and proton conductivity (>0.1 Scm-1). These properties are comparable to or even better than those of the perfluorosulfonic acid ionomer (Nafion 112). The new polyimide ionomers have proved to be a possible candidate as polymer electrolyte membrane for PEFCs and DMFCs.

AB - A series of sulfopropylated and sulfobutylated polyimide copolymers containing fluorenyl groups, SPI-4, were synthesized to investigate the effect of alkyl side chains on the properties (stability, mechanical strength, water uptake, and proton conductivity) of the polymimide electrolyte membranes. SPI-4 showed much better hydrolytic stability (in 10% MeOH aq at 100°C) than the main chain sulfonated polyimide, SPI-1. Tough, flexible, and ductile membranes were obtained from these copolymers. At high relative humidity all the SPI-4 membranes showed high mechanical properties (>34 MPa of the maximum stress) and proton conductivity (>0.1 Scm-1). These properties are comparable to or even better than those of the perfluorosulfonic acid ionomer (Nafion 112). The new polyimide ionomers have proved to be a possible candidate as polymer electrolyte membrane for PEFCs and DMFCs.

KW - Conducting polymers

KW - Ionomers

KW - Membranes

KW - Polyimides

KW - Proton conduction

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JO - Journal of Polymer Science, Part A: Polymer Chemistry

JF - Journal of Polymer Science, Part A: Polymer Chemistry

IS - 19

ER -

Synthesis and properties of polyimide ionomers containing sulfoalkoxy and fluorenyl groups

Abstract

Keywords

ASJC Scopus subject areas

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