Abstract
Ion dynamics in a series of imidazolium-based triblock copolymers (triblock co-PILs) are investigated using broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) and compared to their homopolymer counterparts (homo-PILs). Two calorimetric glass transition temperatures (Tg) are observed corresponding to the charged poly(ionic liquid) (PIL) blocks and noncharged polystyrene (PS) blocks. Varying the counterion from Br- to NTf2 decreases the Tg of the charged block by over 50 °C, thereby increasing the room-temperature ionic dc conductivity by over 6 orders of magnitude. Interestingly, for a given anion, varying the volume fraction of the charged block, from ∼0.5 to ∼0.8, has very minimal effect on the dc ionic conductivity, indicating that the choice of counterion is the key factor influencing charge transport in these systems.
| Language | English |
|---|---|
| Pages | 620-628 |
| Number of pages | 9 |
| Journal | Macromolecules |
| Volume | 52 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2019 Jan 22 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry
Cite this
Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s. / Mapesa, Emmanuel U.; Chen, Mingtao; Heres, Maximilian F.; Harris, Matthew A.; Kinsey, Thomas; Wang, Yangyang; Long, Timothy Edward; Lokitz, Bradley S.; Sangoro, Joshua R.
In: Macromolecules, Vol. 52, No. 2, 22.01.2019, p. 620-628.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Charge Transport in Imidazolium-Based Homo- and Triblock Poly(ionic liquid)s
AU - Mapesa, Emmanuel U.
AU - Chen, Mingtao
AU - Heres, Maximilian F.
AU - Harris, Matthew A.
AU - Kinsey, Thomas
AU - Wang, Yangyang
AU - Long, Timothy Edward
AU - Lokitz, Bradley S.
AU - Sangoro, Joshua R.
PY - 2019/1/22
Y1 - 2019/1/22
N2 - Ion dynamics in a series of imidazolium-based triblock copolymers (triblock co-PILs) are investigated using broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) and compared to their homopolymer counterparts (homo-PILs). Two calorimetric glass transition temperatures (Tg) are observed corresponding to the charged poly(ionic liquid) (PIL) blocks and noncharged polystyrene (PS) blocks. Varying the counterion from Br- to NTf2 decreases the Tg of the charged block by over 50 °C, thereby increasing the room-temperature ionic dc conductivity by over 6 orders of magnitude. Interestingly, for a given anion, varying the volume fraction of the charged block, from ∼0.5 to ∼0.8, has very minimal effect on the dc ionic conductivity, indicating that the choice of counterion is the key factor influencing charge transport in these systems.
AB - Ion dynamics in a series of imidazolium-based triblock copolymers (triblock co-PILs) are investigated using broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) and compared to their homopolymer counterparts (homo-PILs). Two calorimetric glass transition temperatures (Tg) are observed corresponding to the charged poly(ionic liquid) (PIL) blocks and noncharged polystyrene (PS) blocks. Varying the counterion from Br- to NTf2 decreases the Tg of the charged block by over 50 °C, thereby increasing the room-temperature ionic dc conductivity by over 6 orders of magnitude. Interestingly, for a given anion, varying the volume fraction of the charged block, from ∼0.5 to ∼0.8, has very minimal effect on the dc ionic conductivity, indicating that the choice of counterion is the key factor influencing charge transport in these systems.
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U2 - 10.1021/acs.macromol.8b02143
DO - 10.1021/acs.macromol.8b02143
M3 - Article
VL - 52
SP - 620
EP - 628
JO - Macromolecules
T2 - Macromolecules
JF - Macromolecules
SN - 0024-9297
IS - 2
ER -