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dc.contributor.authorOmar S., Dahham
dc.contributor.authorRosniza, Hamzah
dc.contributor.authorMohamad, Abu Bakar
dc.contributor.authorNik Noriman, Zulkepli
dc.contributor.authorAbdulkader M., Alakrach
dc.contributor.authorSam, Sung Ting
dc.contributor.authorMohd Firdaus, Omar
dc.contributor.authorTijjani, Adam
dc.contributor.authorAl-rashdi, Awad A.
dc.date.accessioned2020-11-16T04:31:02Z
dc.date.available2020-11-16T04:31:02Z
dc.date.issued2020
dc.identifier.citationArabian Journal of Chemistry, vol.13(1), 2020, pages 2400-2413en_US
dc.identifier.issn1878-5352 (print)
dc.identifier.urihttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/68730
dc.descriptionLink to publisher's homepage at https://elsevier.com/en_US
dc.description.abstractThe 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.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectOrganic/inorganic hybriden_US
dc.subjectEpoxidized natural rubberen_US
dc.subjectTitaniaen_US
dc.subjectNMRen_US
dc.subjectThermal propertiesen_US
dc.titleInsight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopyen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1016/j.arabjc.2018.05.003
dc.contributor.urlrosnizahamzah@unimap.edu.myen_US


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