Abstract
While glassy dynamics and (ionic) charge transport coincide in low-molecular weight ionic liquids (ILs), they are widely decoupled in corresponding polymeric systems. This is studied by means of broadband dielectric spectroscopy (BDS) for monovalent and bivalent telechelic polyisobutylene (PIB) carrying the Ionic Liquid (IL)-like cationic headgroup (N,N,N-triethylammonium or 1-methylpyrrolidinium) with Br, NTf2, OTf or pTOS as anions, as well as for neat and polymerized 1-vinyl-3-pentylimidazolium bis-(trifluoromethylsulfonyl) imide (PVIM NTf2). The former shows a wealth of dielectrically active fluctuations in contrast to the latter, where only the dynamic glass transition is observed. Additionally a conductivity relaxation originating from charge transport in the IL-like moieties and a weak electrode polarization caused by the accumulation of mobile charge carriers at the metal interfaces is found. In both systems molecular fluctuations and charge transport are well separated from each other thereby enabling accurate description of the net conductivity within the framework of the effective medium approximation for the PIB-based systems.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
