TY - JOUR
T1 - Segmented imidazolium ionenes
T2 - Solution rheology, thermomechanical properties, and electrospinning
AU - Schreiner, Christian
AU - Bridge, Alexander T.
AU - Hunley, Matthew T.
AU - Long, Timothy Edward
AU - Green, Matthew D.
PY - 2017/4/7
Y1 - 2017/4/7
N2 - Segmented imidazolium ionenes with poly (tetramethylene oxide) (PTMO) soft segments and ionic, bis-imidazolium hard segments formed nonwoven fibrous mats upon electrospinning. The segmented imidazolium ionenes exhibited high thermal stability, excellent mechanical properties, and two glass transition temperatures indicative of microphase separation. Tensile analysis revealed strain-induced crystallization for ionenes with a 2 kg/mol PTMO soft segment and increased stress at break with increasing soft segment molecular weight. Solution rheology enabled the determination of solvent quality, overlap and entanglement concentrations, and the influence of ion content on solution properties. Fiber diameters for polymeric fibers electrospun from acetonitrile suggested solution polyelectrolyte behavior that was independent of the PTMO molecular weight. This work reports the successful electrospinning of segmented imidazolium-containing ionenes and an in-depth analysis of their thermomechanical and solution properties.
AB - Segmented imidazolium ionenes with poly (tetramethylene oxide) (PTMO) soft segments and ionic, bis-imidazolium hard segments formed nonwoven fibrous mats upon electrospinning. The segmented imidazolium ionenes exhibited high thermal stability, excellent mechanical properties, and two glass transition temperatures indicative of microphase separation. Tensile analysis revealed strain-induced crystallization for ionenes with a 2 kg/mol PTMO soft segment and increased stress at break with increasing soft segment molecular weight. Solution rheology enabled the determination of solvent quality, overlap and entanglement concentrations, and the influence of ion content on solution properties. Fiber diameters for polymeric fibers electrospun from acetonitrile suggested solution polyelectrolyte behavior that was independent of the PTMO molecular weight. This work reports the successful electrospinning of segmented imidazolium-containing ionenes and an in-depth analysis of their thermomechanical and solution properties.
KW - Electrospinning
KW - Segmented ionenes
KW - Solution rheology
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U2 - 10.1016/j.polymer.2017.03.003
DO - 10.1016/j.polymer.2017.03.003
M3 - Article
AN - SCOPUS:85015037424
SN - 0032-3861
VL - 114
SP - 257
EP - 265
JO - Polymer (United Kingdom)
JF - Polymer (United Kingdom)
ER -