Synthesis of imidazolium ABA triblock copolymers for electromechanical transducers

Matthew D. Green; Dong Wang; Sean T. Hemp; Jae Hong Choi; Karen I. Winey; James R. Heflin; Timothy E. Long

doi:10.1016/j.polymer.2012.06.023

Synthesis of imidazolium ABA triblock copolymers for electromechanical transducers

Matthew D. Green, Dong Wang, Sean T. Hemp, Jae Hong Choi, Karen I. Winey, James R. Heflin, Timothy E. Long

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

76 Scopus citations

Abstract

Nitroxide-mediated polymerization enabled the synthesis of cationic, imidazolium-containing triblock copolymers as a membrane for an electromechanical transducer. Nitroxide-mediated polymerization afforded poly(styrene-b-[1-ethyl-3-(4-vinylbenzyl)imidazolium bis(trifluoromethane sulfonyl)imide)]-b-styrene) in a controlled fashion as confirmed using aqueous size exclusion chromatography and ¹H NMR spectroscopy. Dynamic mechanical analysis revealed a modulus of approximately 100 MPa for the triblock copolymer at 23 °C, which was suitable for fabrication of an electromechanical actuator. Evaluation of electromechanical actuators revealed device curvatures over twice the curvatures for Nafion^® in both the presence and absence of a conductive network composite. Addition of the ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethane sulfonate selectively reduced the glass transition temperature (T_g) of the central block and increased overall ionic conductivity. Normalizing temperature with the central block T_g caused the ionic conductivity for the IL-incorporated polymers to collapse onto a single curve, which was an order of magnitude higher than the block copolymer in the absence of added IL.

Original language	English (US)
Pages (from-to)	3677-3686
Number of pages	10
Journal	Polymer
Volume	53
Issue number	17
DOIs	https://doi.org/10.1016/j.polymer.2012.06.023
State	Published - Aug 2 2012
Externally published	Yes

Keywords

Actuators
Block copolymers
Ionic liquid

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

Access to Document

10.1016/j.polymer.2012.06.023

Cite this

@article{84fe8051850e41d29bd8f090fb7a4667,

title = "Synthesis of imidazolium ABA triblock copolymers for electromechanical transducers",

abstract = "Nitroxide-mediated polymerization enabled the synthesis of cationic, imidazolium-containing triblock copolymers as a membrane for an electromechanical transducer. Nitroxide-mediated polymerization afforded poly(styrene-b-[1-ethyl-3-(4-vinylbenzyl)imidazolium bis(trifluoromethane sulfonyl)imide)]-b-styrene) in a controlled fashion as confirmed using aqueous size exclusion chromatography and 1H NMR spectroscopy. Dynamic mechanical analysis revealed a modulus of approximately 100 MPa for the triblock copolymer at 23 °C, which was suitable for fabrication of an electromechanical actuator. Evaluation of electromechanical actuators revealed device curvatures over twice the curvatures for Nafion{\textregistered} in both the presence and absence of a conductive network composite. Addition of the ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethane sulfonate selectively reduced the glass transition temperature (Tg) of the central block and increased overall ionic conductivity. Normalizing temperature with the central block Tg caused the ionic conductivity for the IL-incorporated polymers to collapse onto a single curve, which was an order of magnitude higher than the block copolymer in the absence of added IL.",

keywords = "Actuators, Block copolymers, Ionic liquid",

author = "Green, {Matthew D.} and Dong Wang and Hemp, {Sean T.} and Choi, {Jae Hong} and Winey, {Karen I.} and Heflin, {James R.} and Long, {Timothy E.}",

note = "Funding Information: The authors wish to acknowledge Dr. Andy Sarles for help with EIS data interpretation. This material is based upon work supported by the U.S. Army Research Office under grant number W911NF-07-1-0452 Ionic Liquids in Electro-Active Devices (ILEAD) MURI. We acknowledge the Institute for Critical Technology and Applied Science (ICTAS) for funding the acquisition of instrumentation used in this research. This material is based upon work supported by the Army Research Office (ARO) under Award No. W911NF-10-1-0307 . ",

year = "2012",

month = aug,

day = "2",

doi = "10.1016/j.polymer.2012.06.023",

language = "English (US)",

volume = "53",

pages = "3677--3686",

journal = "Polymer",

issn = "0032-3861",

publisher = "Elsevier BV",

number = "17",

}

TY - JOUR

T1 - Synthesis of imidazolium ABA triblock copolymers for electromechanical transducers

AU - Green, Matthew D.

AU - Wang, Dong

AU - Hemp, Sean T.

AU - Choi, Jae Hong

AU - Winey, Karen I.

AU - Heflin, James R.

AU - Long, Timothy E.

N1 - Funding Information: The authors wish to acknowledge Dr. Andy Sarles for help with EIS data interpretation. This material is based upon work supported by the U.S. Army Research Office under grant number W911NF-07-1-0452 Ionic Liquids in Electro-Active Devices (ILEAD) MURI. We acknowledge the Institute for Critical Technology and Applied Science (ICTAS) for funding the acquisition of instrumentation used in this research. This material is based upon work supported by the Army Research Office (ARO) under Award No. W911NF-10-1-0307 .

PY - 2012/8/2

Y1 - 2012/8/2

N2 - Nitroxide-mediated polymerization enabled the synthesis of cationic, imidazolium-containing triblock copolymers as a membrane for an electromechanical transducer. Nitroxide-mediated polymerization afforded poly(styrene-b-[1-ethyl-3-(4-vinylbenzyl)imidazolium bis(trifluoromethane sulfonyl)imide)]-b-styrene) in a controlled fashion as confirmed using aqueous size exclusion chromatography and 1H NMR spectroscopy. Dynamic mechanical analysis revealed a modulus of approximately 100 MPa for the triblock copolymer at 23 °C, which was suitable for fabrication of an electromechanical actuator. Evaluation of electromechanical actuators revealed device curvatures over twice the curvatures for Nafion® in both the presence and absence of a conductive network composite. Addition of the ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethane sulfonate selectively reduced the glass transition temperature (Tg) of the central block and increased overall ionic conductivity. Normalizing temperature with the central block Tg caused the ionic conductivity for the IL-incorporated polymers to collapse onto a single curve, which was an order of magnitude higher than the block copolymer in the absence of added IL.

AB - Nitroxide-mediated polymerization enabled the synthesis of cationic, imidazolium-containing triblock copolymers as a membrane for an electromechanical transducer. Nitroxide-mediated polymerization afforded poly(styrene-b-[1-ethyl-3-(4-vinylbenzyl)imidazolium bis(trifluoromethane sulfonyl)imide)]-b-styrene) in a controlled fashion as confirmed using aqueous size exclusion chromatography and 1H NMR spectroscopy. Dynamic mechanical analysis revealed a modulus of approximately 100 MPa for the triblock copolymer at 23 °C, which was suitable for fabrication of an electromechanical actuator. Evaluation of electromechanical actuators revealed device curvatures over twice the curvatures for Nafion® in both the presence and absence of a conductive network composite. Addition of the ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethane sulfonate selectively reduced the glass transition temperature (Tg) of the central block and increased overall ionic conductivity. Normalizing temperature with the central block Tg caused the ionic conductivity for the IL-incorporated polymers to collapse onto a single curve, which was an order of magnitude higher than the block copolymer in the absence of added IL.

KW - Actuators

KW - Block copolymers

KW - Ionic liquid

UR - http://www.scopus.com/inward/record.url?scp=84864284605&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864284605&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2012.06.023

DO - 10.1016/j.polymer.2012.06.023

M3 - Article

AN - SCOPUS:84864284605

SN - 0032-3861

VL - 53

SP - 3677

EP - 3686

JO - Polymer

JF - Polymer

IS - 17

ER -

Synthesis of imidazolium ABA triblock copolymers for electromechanical transducers

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this