Microwave Dielectric Relaxation, Electrical Conductance, and Ultrasonic Relaxation of LiPF6in Poly(ethylene oxide) Dimethyl Ether-500

2002 ◽  
Vol 106 (9) ◽  
pp. 2140-2145 ◽  
Author(s):  
Oleg Borodin ◽  
Richard Douglas ◽  
Grant Smith ◽  
Edward M. Eyring ◽  
Sergio Petrucci
Keyword(s):  
Ethylene Oxide ◽  
Dielectric Relaxation ◽  
Dimethyl Ether ◽  
Electrical Conductance ◽  
Microwave Dielectric ◽  
Poly Ethylene Oxide ◽  
Ultrasonic Relaxation ◽  
Poly Ethylene

scholarly journals Effect of soft segment molecular weight on the glass transition, crystallinity, molecular mobility and segmental dynamics of poly(ethylene oxide) based poly(urethane–urea) copolymers

RSC Advances ◽  
2017 ◽  
Vol 7 (65) ◽  
pp. 40745-40754 ◽  
Author(s):  
Oguzhan Oguz ◽  
Stefanos A. Koutsoumpis ◽  
Eren Simsek ◽  
Emel Yilgor ◽  
Iskender Yilgor ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Ethylene Oxide ◽  
Dielectric Relaxation ◽  
Molecular Mobility ◽  
Soft Segment ◽  
Dielectric Relaxation Spectroscopy ◽  
Segmental Dynamics ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

The effect of poly(ethylene oxide) (PEO) soft segment molecular weight (Mn= 2000, 4600, 8000 g mol−1) molecular mobility and segmental dynamics of a series of polyurethane–urea copolymers (PU) was investigated by dielectric relaxation spectroscopy.

Conductivity and dielectric relaxation of Li salt in poly(ethylene oxide) and epoxidized natural rubber polymer electrolytes

Ionics ◽  
2013 ◽  
Vol 20 (2) ◽  
pp. 189-199 ◽  
Author(s):  
Chin Han Chan ◽  
Hans-Werner Kammer ◽  
Lai Har Sim ◽  
Siti Nor Hafiza Mohd Yusoff ◽  
Amirah Hashifudin ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Natural Rubber ◽  
Dielectric Relaxation ◽  
Polymer Electrolytes ◽  
Epoxidized Natural Rubber ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Ion-Conducting Flexible Thin Films of Composites from Poly(ethylene oxide) and Nematic Liquid Crystals E8—Characterization by Impedance and Dielectric Relaxation Spectroscopy

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4465
Author(s):  
Georgi B. Hadjichristov ◽  
Todor E. Vlakhov ◽  
Yordan G. Marinov ◽  
Nicola Scaramuzza
Keyword(s):  
Thin Films ◽  
Liquid Crystals ◽  
Ethylene Oxide ◽  
Dielectric Relaxation ◽  
Electrical Impedance ◽  
Nematic Liquid Crystals ◽  
Molecular Organization ◽  
Poly Ethylene Oxide ◽  
Ion Conducting ◽  
Poly Ethylene

Complex electrical impedance and dielectric spectroscopy were applied to study the dielectric relaxations and their thermal behavior in ion-conducting composites/complexes from polymer poly(ethylene oxide) (PEO) and E8 nematic liquid crystals (LCs), at the compositional ratio PEO:E8 = 70:30 wt%. Flexible thin films of PEO/E8 with a thickness of 150 μm were inspected, as well as such films from Na+ ion-conducting electrolyte PEO/E8/NaIO4 with the same PEO:E8 compositional ratio, but additionally containing 10 wt.% from the salt sodium metaperiodate (NaIO4) as a dopant of Na+ ions. The molecular dynamics, namely the dielectric relaxation of PEO/E8 and PEO/E8/NaIO4, were characterized through analyses of complex impedance and dielectric spectra measured in the frequency range of 1 Hz–1 MHz, under variation of temperature from below to above the glass-transition temperature of these composites. The relaxation and polarization of dipole formations in PEO/E8 and PEO/E8/NaIO4 were evidenced and compared in terms of both electrical impedance and dielectric response depending on temperature. The results obtained for molecular organization, molecular relaxation dynamics, and electric polarization in the studied ion-conducting polymer/LC composites/complexes can be helpful in the optimization of their structure and performance, and are attractive for applications in flexible organic electronics, energy storage devices, and mechatronics.

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