Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy
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my.unimap-687302020-11-16T04:31:02Z Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy Omar S., Dahham Rosniza, Hamzah Mohamad, Abu Bakar Nik Noriman, Zulkepli Abdulkader M., Alakrach Sam, Sung Ting Mohd Firdaus, Omar Tijjani, Adam Al-rashdi, Awad A. rosnizahamzah@unimap.edu.my Organic/inorganic hybrid Epoxidized natural rubber Titania NMR Thermal properties Link to publisher's homepage at https://elsevier.com/ The ring-opening reactions (ROR) of epoxide groups in epoxidized natural rubber/titania (ENR-50/TiO2) hybrid in potassium hydroxide/isopropanol medium were examined using NMR spectroscopy and supported by the FTIR technique. The thermal behaviour of the hybrid was also studied using TG/DTG and DSC analyses. The 1H NMR results suggested that 16.82% of ROR occurred in the hybrid, while the 13C NMR results exhibited five new peaks at δ 19.5, 71.0, 73.7, 91.7 and 94.4 ppm in the hybrid. 2D NMR, such as HMQC, HMBC and COSY techniques, further scrutinized these assignments. The FTIR spectrum exhibited Ti-O-C characteristics via the peak at 1028 cm−1. The TG/DTG results showed four steps of thermal degradation at 44–148, 219–309, 331–489 and 629–810 °C due to the existence of Ti moieties along with a polymer chain mixture (intact and ring-opened epoxide groups) of ENR-50, which in turn led to an increase in the Tg value of the hybrid to 27 °C compared to that of purified ENR-50 at −17.72 °C. 2020-11-16T04:31:02Z 2020-11-16T04:31:02Z 2020 Article Arabian Journal of Chemistry, vol.13(1), 2020, pages 2400-2413 1878-5352 (print) http://dspace.unimap.edu.my:80/xmlui/handle/123456789/68730 https://doi.org/10.1016/j.arabjc.2018.05.003 en Elsevier |
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Organic/inorganic hybrid Epoxidized natural rubber Titania NMR Thermal properties |
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Organic/inorganic hybrid Epoxidized natural rubber Titania NMR Thermal properties Omar S., Dahham Rosniza, Hamzah Mohamad, Abu Bakar Nik Noriman, Zulkepli Abdulkader M., Alakrach Sam, Sung Ting Mohd Firdaus, Omar Tijjani, Adam Al-rashdi, Awad A. Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy |
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Link to publisher's homepage at https://elsevier.com/ |
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rosnizahamzah@unimap.edu.my |
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rosnizahamzah@unimap.edu.my Omar S., Dahham Rosniza, Hamzah Mohamad, Abu Bakar Nik Noriman, Zulkepli Abdulkader M., Alakrach Sam, Sung Ting Mohd Firdaus, Omar Tijjani, Adam Al-rashdi, Awad A. |
| format |
Article |
| author |
Omar S., Dahham Rosniza, Hamzah Mohamad, Abu Bakar Nik Noriman, Zulkepli Abdulkader M., Alakrach Sam, Sung Ting Mohd Firdaus, Omar Tijjani, Adam Al-rashdi, Awad A. |
| author_sort |
Omar S., Dahham |
| title |
Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy |
| title_short |
Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy |
| title_full |
Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy |
| title_fullStr |
Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy |
| title_full_unstemmed |
Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy |
| title_sort |
insight on the structural aspect of enr-50/tio2 hybrid in koh/c3h8o medium revealed by nmr spectroscopy |
| publisher |
Elsevier |
| publishDate |
2020 |
| url |
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/68730 |
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1698698502596460544 |
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13.214268 |