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- Title
Comparing Ammonium and Phosphonium Polymerized Ionic Liquids: Thermal Analysis, Conductivity, and Morphology.
- Authors
Hemp, Sean T.; Zhang, Mingqiang; Allen, Michael H.; Cheng, Shijing; Moore, Robert B.; Long, Timothy E.
- Abstract
Conventional free radical polymerization and anion metathesis of ammonium and phosphonium styrenics successfully generates high-molecular-weight polymerized ionic liquids (PILs). Phosphonium polyelectrolytes containing Cl- counterions display significantly higher thermal stabilities (>370 °C) compared with ammonium analogs (<220 °C). Anion exchange to BF4-, TfO-, and Tf2N- improves the thermal stability of all the PILs and depresses their Tg. Impedance-spectroscopy-probed ionic conductivities of PILs containing Tf2N-, and phosphonium PILs exhibit higher values than ammonium analogs. Phosphonium PILs displayed many advantages over ammonium PILs for emerging applications that demand higher thermal stabilities and ionic conductivities.
- Subjects
AMMONIUM; IONIC liquids; POLYWATER; THERMAL analysis; CHEMICAL reactions
- Publication
Macromolecular Chemistry & Physics, 2013, Vol 214, Issue 18, p2099
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201300322