The local free volume, glass transition, and ionic conductivity in a polymer electrolyte: A positron lifetime study

2001 ◽  
Vol 115 (15) ◽  
pp. 7260-7270 ◽  
Author(s):  
D. Bamford ◽  
G. Dlubek ◽  
A. Reiche ◽  
M. A. Alam ◽  
W. Meyer ◽  
...  
Keyword(s):  
Glass Transition ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Free Volume ◽  
Positron Lifetime

Glass transition and free volume in the mobile (MAF) and rigid (RAF) amorphous fractions of semicrystalline PTFE: a positron lifetime and PVT study

Polymer ◽  
2005 ◽  
Vol 46 (16) ◽  
pp. 6075-6089 ◽  
Author(s):  
G. Dlubek ◽  
A. Sen Gupta ◽  
J. Pionteck ◽  
R. Häßler ◽  
R. Krause-Rehberg ◽  
...  
Keyword(s):  
Glass Transition ◽  
Free Volume ◽  
Positron Lifetime

Free volume and glass transition in ethylene/1-octene copolymers: positron lifetime studies and dynamic mechanical analysis

Polymer ◽  
2002 ◽  
Vol 43 (25) ◽  
pp. 6973-6983 ◽  
Author(s):  
D. Kilburn ◽  
D. Bamford ◽  
T. Lüpke ◽  
G. Dlubek ◽  
T.J. Menke ◽  
...  
Keyword(s):  
Glass Transition ◽  
Dynamic Mechanical Analysis ◽  
Free Volume ◽  
Positron Lifetime ◽  
Mechanical Analysis ◽  
Dynamic Mechanical ◽  
Lifetime Studies

scholarly journals STUDI KONDUKTIVITAS ELEKTROLIT POLIMER KITOSAN/PVA+KOH

2011 ◽  
Vol 1 (2) ◽  
pp. 13-17
Author(s):  
R.Putri ◽  
A.Maddu ◽  
Irzaman
Keyword(s):  
Thermal Analysis ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Ionic Conductivity ◽  
Polyvinyl Alcohol ◽  
Polymer Electrolyte ◽  
Potassium Hydroxide ◽  
Room Temperature ◽  
Casting Technique

The blend-based polymer electrolyte consisting of chitosan and polyvinyl alcohol (PVA) as host polymers and potassium hydroxide (KOH) as the complexing salt was studied. Polymerelectrolyte were obtained by the casting technique. An attempt was also made to investigate the effect of TiO2 concentration in the chitosan/PVA+KOH polymer electrolyte. The best ionic conductivity values of 1,105 x 10-2 S cm-1 at room temperature were obtained for the sample containing 35%wt of KOH and 1,210 x 10-2 S cm-1 for the sample containing 50% wt TiO2. The polymer electrolyte with good ionic conductivity properties were characterized by thermal analysis (DSC). The glass transition temperature about 75.30 °C for the optimum Chitosan/PVA+KOH

Ionic conductivity, glass transition, and local free volume in poly(ethylene oxide) electrolytes: Single and mixed ion conductors

2003 ◽  
Vol 118 (20) ◽  
pp. 9420-9432 ◽  
Author(s):  
D. Bamford ◽  
A. Reiche ◽  
G. Dlubek ◽  
F. Alloin ◽  
J.-Y. Sanchez ◽  
...  
Keyword(s):  
Glass Transition ◽  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Free Volume ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Ion Conductors

scholarly journals Morphological effect of side chain on H3O+ transfer inside polymer electrolyte membranes across polymeric chain via molecular dynamics simulation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
JinHyeok Cha
Keyword(s):  
Fuel Cell ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Dynamics Simulation ◽  
Polymeric Chain ◽  
Side Chains ◽  
Dynamic Simulations ◽  
Morphological Effect ◽  
Electrolyte Membrane

AbstractPerformance and durability of polymer electrolyte membrane are critical to fuel cell quality. As fuel cell vehicles become increasingly popular, membrane fundamentals must be understood in detail. Here, this study used molecular dynamic simulations to explore the morphological effects of perfluorosulfonic acid (PFSA)-based membranes on ionic conductivity. In particular, I developed an intuitive quantitative approach focusing principally on hydronium adsorbing to, and desorbing from, negatively charged sulfonate groups, while conventional ionic conductivity calculations featured the use of mean square displacements that included natural atomic vibrations. The results revealed that shorter side-chains caused more hydroniums to enter the conductive state, associated with higher ion conductivity. In addition, the hydronium path tracking showed that shorter side-chains allowed hydroniums to move among host groups, facilitating chain adsorption, in agreement with a mechanism suggested in earlier studies.

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