Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun

In this study, immiscible blends of poly(ethylene oxide) (PEO) and epoxidized natural rubber with 50 mol% epoxide content (ENR-50) added with lithium perchlorate (LiC104) and nano-sized titanium dioxide (Ti02) were studied. To have a systematic comparison, a series of systems of PEO/LiC104, PEO/Ti02...

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Main Author:	Harun, Fatin
Format:	Thesis
Language:	English
Published:	2018
Subjects:	Analytical chemistry
Online Access:	https://ir.uitm.edu.my/id/eprint/39299/1/39299.pdf
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spelling	my-uitm-ir.392992021-08-30T03:48:24Z Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun 2018-02 Harun, Fatin Analytical chemistry In this study, immiscible blends of poly(ethylene oxide) (PEO) and epoxidized natural rubber with 50 mol% epoxide content (ENR-50) added with lithium perchlorate (LiC104) and nano-sized titanium dioxide (Ti02) were studied. To have a systematic comparison, a series of systems of PEO/LiC104, PEO/Ti02, PEO/LiC104/Ti02, ENR50/LiClO4, ENR-50/TiO2, ENR-50/LiClO4/TiO2, PEO/ENR-50, PEO/ENR-50/LiClO4 and PEO/ENR-50/LiClO4/TiO2 were prepared via solution casting method. The thermal properties, conductivity, intermolecular interaction, morphologies, crystalline structures and rheological behavior were studied accordingly with greater emphasis on the relationship between thermal properties and conductivity behaviour. From impedance spectroscopy analysis, the ionic conductivity at room temperature was found in the order of PEO/LiC104 > PEO/ENR-50/LiClO4/TiO2 « PEO/ENR50/LiClO4 > PEO/LiC104/Ti02 > ENR-50/LiClO4 > ENR-50/LiClO4/TiO2 at constant salt concentration. The highest conductivity achieved is ~10-7 S cm-1 for PEO/LiC104 system. From differential scanning calorimetry (DSC) analysis, the trend of glass transition temperature(s) which represents the segmental motion of polymer(s) is different for each particular system. The glass transition temperature shows that most of the LiC104 salt dissolves in the amorphous phase of PEO rather than ENR-50 in the blend. The role of Ti02 filler contributing to the ionic conductivity of PEO-blend CPEs is still ambiguous. This underlines the importance of polymer(s)-salt-filler interaction, polymer(s) segmental motion, morphologies, location of salt, location of filler etc in understanding conductivity percolation path of immiscible PEO/ENR-50 blend-composite polymer electrolytes. 2018-02 Thesis https://ir.uitm.edu.my/id/eprint/39299/ https://ir.uitm.edu.my/id/eprint/39299/1/39299.pdf text en public phd doctoral Universiti Teknologi MARA Faculty of Applied Sciences Han, Chan Chin (Assoc. Prof. Dr. )
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Han, Chan Chin (Assoc. Prof. Dr. )
topic	Analytical chemistry
spellingShingle	Analytical chemistry Harun, Fatin Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun
description	In this study, immiscible blends of poly(ethylene oxide) (PEO) and epoxidized natural rubber with 50 mol% epoxide content (ENR-50) added with lithium perchlorate (LiC104) and nano-sized titanium dioxide (Ti02) were studied. To have a systematic comparison, a series of systems of PEO/LiC104, PEO/Ti02, PEO/LiC104/Ti02, ENR50/LiClO4, ENR-50/TiO2, ENR-50/LiClO4/TiO2, PEO/ENR-50, PEO/ENR-50/LiClO4 and PEO/ENR-50/LiClO4/TiO2 were prepared via solution casting method. The thermal properties, conductivity, intermolecular interaction, morphologies, crystalline structures and rheological behavior were studied accordingly with greater emphasis on the relationship between thermal properties and conductivity behaviour. From impedance spectroscopy analysis, the ionic conductivity at room temperature was found in the order of PEO/LiC104 > PEO/ENR-50/LiClO4/TiO2 « PEO/ENR50/LiClO4 > PEO/LiC104/Ti02 > ENR-50/LiClO4 > ENR-50/LiClO4/TiO2 at constant salt concentration. The highest conductivity achieved is ~10-7 S cm-1 for PEO/LiC104 system. From differential scanning calorimetry (DSC) analysis, the trend of glass transition temperature(s) which represents the segmental motion of polymer(s) is different for each particular system. The glass transition temperature shows that most of the LiC104 salt dissolves in the amorphous phase of PEO rather than ENR-50 in the blend. The role of Ti02 filler contributing to the ionic conductivity of PEO-blend CPEs is still ambiguous. This underlines the importance of polymer(s)-salt-filler interaction, polymer(s) segmental motion, morphologies, location of salt, location of filler etc in understanding conductivity percolation path of immiscible PEO/ENR-50 blend-composite polymer electrolytes.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Harun, Fatin
author_facet	Harun, Fatin
author_sort	Harun, Fatin
title	Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun
title_short	Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun
title_full	Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun
title_fullStr	Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun
title_full_unstemmed	Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun
title_sort	thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / fatin harun
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Applied Sciences
publishDate	2018
url	https://ir.uitm.edu.my/id/eprint/39299/1/39299.pdf
_version_	1783734502319718400

Thermal and conductivity studies of composite polymer blend electrolytes based on poly(ethylene oxide) and epoxidized natural rubber / Fatin Harun

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