Impedance spectroscopy of polymer electrolytes based on epoxidized natural rubber with 50 mol% epoxide content

2015 ◽  
Vol 55 (10) ◽  
pp. 2250-2255 ◽  
Author(s):  
Chin Han Chan ◽  
Hans-Werner Kammer
Keyword(s):  
Impedance Spectroscopy ◽  
Natural Rubber ◽  
Polymer Electrolytes ◽  
Epoxidized Natural Rubber

Thermal Degradation Study of Lithium and Potassium Iodide/Epoxidized Natural Rubber Polymer Electrolytes

2013 ◽  
Vol 652-654 ◽  
pp. 757-764
Author(s):  
Tan Wei Leng ◽  
Yuan Xiang Yeoh ◽  
Mohamad Abu Bakar
Keyword(s):  
Thermal Degradation ◽  
Natural Rubber ◽  
Potassium Iodide ◽  
Polymer Electrolytes ◽  
Epoxidized Natural Rubber ◽  
Heating Rates ◽  
Salt Loading ◽  
Higher Ed ◽  
Degradation Activation Energy ◽  
Early Degradation

Lithium iodide/epoxidized natural rubber (LiI/ENR-50) and potassium iodide/epoxized natural rubber (KI/ENR-50) polymer electrolytes (PEs) were prepared via solvent casting. The PEs were characterized using FTIR, DSC and SEM techniques. The observed IR bands shift and the increased in Tg value in both PEs suggest that some interactions may have occurred between the ENR-50 and the respective cations. The appearance of new C=O band at ~1720 cm-1 coupled with the intensification of the OH band in KI/ENR-50 was due to the early degradation of ENR-50 promoted by KI. The kinetic analyses of the thermal degradation of neat ENR-50 and the respective PEs were studied using TG at five different heating rates. Kissinger was employed to obtain the degradation activation energy (Ed). LiI/ENR-50 shows higher Ed as compared to pristine ENR-50 and the Ed increases with increasing LiI loading. The Ed of KI/ENR-50 was observed to be higher than that of pristine ENR-50 when KI is 30 wt %. Thus, LiI retards the degradation of ENR-50 regardless of the wt % LiI added. KI, however, can either retard or catalyzed the degradation of ENR-50 depending on the salt loading.

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 Influence of thermal treatment on the properties and intermolecular interactions of epoxidized natural rubber-salt systems

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nurul Fatahah Asyqin Zainal ◽  
Hairunnisa Ramli ◽  
Margarethe Fritz ◽  
Volker Abetz ◽  
Chin Han Chan
Keyword(s):  
Thermal Treatment ◽  
Natural Rubber ◽  
Intermolecular Interactions ◽  
Polymer Electrolytes ◽  
Salt Content ◽  
Ionic Conductivities ◽  
Solid Polymer Electrolytes ◽  
Epoxidized Natural Rubber ◽  
Solid Polymer ◽  
Salt Systems

Abstract The influence of thermal treatment on the thermal stability, thermal properties, dielectric properties and intermolecular interaction of binary epoxidized natural rubber (ENR)-salt systems, which may be a candidate for solid polymer electrolytes (SPEs) was investigated. Solubility of salt in ENR enhances, which may be due to the disruption of the lightly-crosslinked microgel under heat treatment. The increase in the ionic conductivities of the thermally treated ENR SPEs at constant salt content is correlated to the higher glass transition temperatures, development of percolation network and higher extent of intermolecular interactions between ENR and charged entities in this study.

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