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Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun

Epoxidized natural rubbers (ENR-25 and ENR-50), methylated grafted natural rubbers (MG-30 and MG-49) and deproteinized natural rubber (DPNR) doped with 0 - 30 wt % of LiClO4 were prepared by solution casting technique. Thermal stability ( d T ) and glass transition temperature ( g T ) of all the...

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Main Author: Hamidun, Nur Atiqah
Format: Student Project
Language:English
Published: Faculty of Applied Sciences 2009
Subjects:
QD Chemistry
Online Access:http://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf
http://ir.uitm.edu.my/id/eprint/765/
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spelling my.uitm.ir.7652018-10-24T00:45:38Z http://ir.uitm.edu.my/id/eprint/765/ Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun Hamidun, Nur Atiqah QD Chemistry Epoxidized natural rubbers (ENR-25 and ENR-50), methylated grafted natural rubbers (MG-30 and MG-49) and deproteinized natural rubber (DPNR) doped with 0 - 30 wt % of LiClO4 were prepared by solution casting technique. Thermal stability ( d T ) and glass transition temperature ( g T ) of all the rubber samples were investigated by Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC), respectively. Quantities d T show that ENR-25 and ENR-50 are thermally more stable than that of DPNR, MG-30 and MG-49. The Tg values of all the rubber samples show no significant variation with ascending salt content after 5 wt % of LiClO4 added. Ionic conductivity ( studied by impedance spectroscopy show that MG-49 and ENR-25 exhibit higher  values of 8.810-8 and 9.510-8 S cm-1 than MG-30 and ENR-50, respectively. ATR-FTIR was applied to examine the ion-dipole interactions between the LiClO4 salt and the rubber samples. It is observed that the Li+ ions preferentially coordinated to the epoxy oxygen of the ENR. For MG-30 and MG-49, the Li+ ions are mainly coordinated to the C-O and the C=O of the ester groups. Faculty of Applied Sciences 2009 Student Project NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf Hamidun, Nur Atiqah (2009) Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun. [Student Project] (Unpublished)
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Hamidun, Nur Atiqah
Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun
description Epoxidized natural rubbers (ENR-25 and ENR-50), methylated grafted natural rubbers (MG-30 and MG-49) and deproteinized natural rubber (DPNR) doped with 0 - 30 wt % of LiClO4 were prepared by solution casting technique. Thermal stability ( d T ) and glass transition temperature ( g T ) of all the rubber samples were investigated by Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC), respectively. Quantities d T show that ENR-25 and ENR-50 are thermally more stable than that of DPNR, MG-30 and MG-49. The Tg values of all the rubber samples show no significant variation with ascending salt content after 5 wt % of LiClO4 added. Ionic conductivity ( studied by impedance spectroscopy show that MG-49 and ENR-25 exhibit higher  values of 8.810-8 and 9.510-8 S cm-1 than MG-30 and ENR-50, respectively. ATR-FTIR was applied to examine the ion-dipole interactions between the LiClO4 salt and the rubber samples. It is observed that the Li+ ions preferentially coordinated to the epoxy oxygen of the ENR. For MG-30 and MG-49, the Li+ ions are mainly coordinated to the C-O and the C=O of the ester groups.
format Student Project
author Hamidun, Nur Atiqah
author_facet Hamidun, Nur Atiqah
author_sort Hamidun, Nur Atiqah
title Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun
title_short Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun
title_full Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun
title_fullStr Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun
title_full_unstemmed Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun
title_sort conductivity, thermal behaviour and ftir studies on different modified natural rubbers / nur atiqah hamidun
publisher Faculty of Applied Sciences
publishDate 2009
url http://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf
http://ir.uitm.edu.my/id/eprint/765/
_version_ 1685648089220644864
score 13.211869

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