TY - DATA T1 - Influence of Cation Type on Structure and Dynamics in Sulfonated Polystyrene Ionomers PY - 2011/07/12 AU - Alicia M. Castagna AU - Wenqin Wang AU - Karen I. Winey AU - James Runt UR - https://acs.figshare.com/articles/journal_contribution/Influence_of_Cation_Type_on_Structure_and_Dynamics_in_Sulfonated_Polystyrene_Ionomers/2631801 DO - 10.1021/ma2009657.s001 L4 - https://ndownloader.figshare.com/files/4283052 KW - monovalent ions Cs KW - diameter KW - Na KW - dynamic KW - dielectric relaxation spectroscopy KW - relaxation time KW - Sulfonated Polystyrene IonomersThe structure KW - temperature relaxations KW - ionomer KW - SPS KW - number density KW - Cation Type KW - sphere model KW - scanning transmission electron microscopy KW - monovalent ion type KW - Additional information KW - dielectric loss spectra N2 - The structure and dynamics of Na-, Cs-, and Zn-neutralized sulfonated polystyrene (SPS) ionomers were investigated using scanning transmission electron microscopy (STEM), X-ray scattering, and dielectric relaxation spectroscopy. Aggregates ∼2 nm in diameter were revealed by STEM and X-ray scattering. Additional information on aggregate diameter, radius of closest approach, and number density were determined by fitting the scattering data with a modified hard sphere model. A single broad segmental relaxation was identified in dielectric loss spectra for the ionomers neutralized with monovalent ions Cs and Na. The relaxation time of the segmental process was found to slow down systematically with increasing degree of sulfonation but is not significantly affected by monovalent ion type. For Cs-neutralized SPS, two high temperature relaxations associated with Maxwell–Wagner–Sillars and ion association/disassociation dynamics were identified. ER -