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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| Format: | Student Project |
| Language: | English |
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Faculty of Applied Sciences
2009
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| Online Access: | http://ir.uitm.edu.my/id/eprint/765/ http://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf |
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uitm-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 8.810-8 and 9.510-8 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 [Student Project] (Unpublished) |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Teknologi MARA |
| building |
UiTM Institutional Repository |
| collection |
Online Access |
| 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 8.810-8 and 9.510-8 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/ http://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf |
| first_indexed |
2023-09-18T22:45:00Z |
| last_indexed |
2023-09-18T22:45:00Z |
| _version_ |
1777417165902708736 |