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: | https://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf |
| _version_ | 1825733496744706048 |
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| author | Hamidun, Nur Atiqah |
| author_facet | Hamidun, Nur Atiqah |
| author_sort | Hamidun, Nur Atiqah |
| collection | UITM |
| 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. |
| first_indexed | 2024-03-06T01:18:02Z |
| format | Student Project |
| id | oai:ir.uitm.edu.my:765 |
| institution | Universiti Teknologi MARA |
| language | English |
| last_indexed | 2024-03-06T01:18:02Z |
| publishDate | 2009 |
| publisher | Faculty of Applied Sciences |
| record_format | dspace |
| spelling | oai:ir.uitm.edu.my:7652018-10-24T00:45:38Z https://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 https://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun. (2009) [Student Project] <http://terminalib.uitm.edu.my/765.pdf> (Unpublished) |
| spellingShingle | QD Chemistry Hamidun, Nur Atiqah Conductivity, thermal behaviour and ftir studies on different modified natural rubbers / Nur Atiqah Hamidun |
| title | 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_short | 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 |
| topic | QD Chemistry |
| url | https://ir.uitm.edu.my/id/eprint/765/1/PPb_NUR%20ATIQAH%20HAMIDUN%20AS%2009_5.pdf |
| work_keys_str_mv | AT hamidunnuratiqah conductivitythermalbehaviourandftirstudiesondifferentmodifiednaturalrubbersnuratiqahhamidun |