TY - JOUR
T1 - Alkyl-substituted N-vinylimidazolium polymerized ionic liquids
T2 - Thermal properties and ionic conductivities
AU - Green, Matthew D.
AU - Salas-De La Cruz, David
AU - Ye, Yuesheng
AU - Layman, John M.
AU - Elabd, Yossef A.
AU - Winey, Karen I.
AU - Long, Timothy Edward
PY - 2011/12/1
Y1 - 2011/12/1
N2 - Structure-property relationships for polymerized ionic liquids (PILs) relate chemical structure to ionic conductivity and reveal the importance of glass transition temperature (Tg) and the energy associated with an ion-hopping mechanism for ion conduction for a series of alkyl-substituted vinylimidazolium PILs. The alkyl-substituted vinylimidazolium-based PILs with varying lengths of n-alkyl substituents provide diverse precursors with exchangeable anions to further enhance thermal stability and ionic conductivity. As the anion size increases, regardless of alkyl substituent length, T g decreases and the onset of weight loss, TD, increases. As the length of the alkyl substituent increases, Tg decreases for PILs with Br- and BF4- counteranions. Ionic conductivity increases over an order of magnitude upon exchange of the counteranion from TfO- < Tf2N-.
AB - Structure-property relationships for polymerized ionic liquids (PILs) relate chemical structure to ionic conductivity and reveal the importance of glass transition temperature (Tg) and the energy associated with an ion-hopping mechanism for ion conduction for a series of alkyl-substituted vinylimidazolium PILs. The alkyl-substituted vinylimidazolium-based PILs with varying lengths of n-alkyl substituents provide diverse precursors with exchangeable anions to further enhance thermal stability and ionic conductivity. As the anion size increases, regardless of alkyl substituent length, T g decreases and the onset of weight loss, TD, increases. As the length of the alkyl substituent increases, Tg decreases for PILs with Br- and BF4- counteranions. Ionic conductivity increases over an order of magnitude upon exchange of the counteranion from TfO- < Tf2N-.
KW - anion exchange
KW - imidazolium
KW - ionic conductivity
KW - polymerizable ionic liquid
KW - VFT-dependent conductivity
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U2 - 10.1002/macp.201100389
DO - 10.1002/macp.201100389
M3 - Article
AN - SCOPUS:82555194233
SN - 1022-1352
VL - 212
SP - 2522
EP - 2528
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
IS - 23
ER -