Rosniza Hamzah
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Preferred name
Rosniza Hamzah
Official Name
Rosniza, Hamzah
Alternative Name
Rosniza, H.
Hamzah, Rosniza
Rosnizah, R.
Hamzah, R.
Main Affiliation
Scopus Author ID
55370656600
Researcher ID
AAD-3070-2019

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  • Publication
    Flexural properties of rice husk (Oryza sativa) reinforced low density polyethylene composites for industrial injection moulded parts
    ( 2020-03-25)
    Jaya H.
    ;
    Nik Noriman Zulkepli
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Mohd Firdaus Omar
    ;
    Rosniza Hamzah
    ;
    Dahham O.S.
    ;
    Umar M.U.
    Injection moulding had been one of the best choices in plastic manufacturing industry as it manage produced complex-shaped plastic parts in very short cycle times. This article is concerned with the flexural properties of low-density polyethylene (LDPE) reinforced with rice husk (RH) filler specifically for injection moulded parts. In this study, the RH/LDPE composites with different loadings of 5, 10, and 15 wt.% RH were feed into injection moulding machine and the moulded parts were tested using conventional universal testing machine. The results showed that the flexural properties of the RH/LDPE composites were strongly affected by the filler loadings. Furthermore, all the flexural properties of the RH/LDPE composites showed increasing trend as the filler loading increased, up to 15 wt.% of RH loading.
      1  9
  • Publication
    Mechanical properties of rice husk (Oryza sativa) reinforced low density polyethylene composites for industrial injection moulded parts
    ( 2020-03-25)
    Jaya H.
    ;
    Nik Noriman Zulkepli
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Mohd Firdaus Omar
    ;
    Rosniza Hamzah
    ;
    Dahham O.S.
    ;
    Umar M.U.
    Injection moulding is one of the most widely used processes in manufacturing plastic products, which has developed into a mature technology. Injection moulding is greatly preferred in manufacturing industry because it can produce complex-shaped plastic parts with good dimensional accuracy in very short cycle times. This article is concerned with the tensile properties of low-density polyethylene (LDPE) reinforced with alkaline treated rice husk (RH) specifically for injection moulded parts. In this study, the RH/LDPE composites with different loadings of 5, 10, and 15 wt.% treated RH were feed into injection moulding machine and the moulded parts were tested using conventional universal testing machine. The results showed that the tensile and flexural properties of the RH/LDPE composites were strongly affected by the filler loadings. Furthermore, all the tensile and flexural properties of the RH/LDPE composites showed increasing trend as the filler loading increased, up to 15 wt.% treated RH.
      1
  • Publication
    Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy
    ( 2020)
    Omar S. Dahham
    ;
    Rosniza Hamzah
    ;
    Mohamad Abu Bakar
    ;
    Nik Noriman Zulkepli
    ;
    Abdulkader M. Alakrach
    ;
    Sam Sung Ting
    ;
    Mohd Firdaus Omar
    ;
    Tijjani Adam
    ;
    Awad A. Al-rashdi
    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.
      4  12
  • Publication
    Impact strength of LDPE/RH composites for industrial injection moulded parts
    ( 2020-03-25)
    Jaya H.
    ;
    Nik Noriman Zulkepli
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Mohd Firdaus Omar
    ;
    Rosniza Hamzah
    ;
    Dahham O.S.
    ;
    Umar M.U.
    This article is concerned with the impact properties of rice husk (RH) reinforced low density polyethylene (LDPE) specifically for injection moulded parts. In this study, the RH/LDPE composites with different loadings of 5, 10, and 15 wt.% rice husks were feed into injection moulding machine and the moulded parts were tested using compact Charpy impact tester. The results showed that the impact strength properties of the RH/LDPE composites were strongly affected by the rice husk filler loadings. Furthermore, the impact properties of the tested RH/LDPE composite specimens showed increasing trend as the filler loading increased, up to 15 wt.% rice husk loading.
      1
  • Publication
    Insight on the structural aspect of ENR-50/TiO2 hybrid in KOH/C3H8O medium revealed by NMR spectroscopy
    ( 2020-01-01)
    Dahham O.S.
    ;
    Rosniza Hamzah
    ;
    Abu Bakar M.
    ;
    Nik Noriman Zulkepli
    ;
    Alakrach A.M.
    ;
    Sam Sung Ting
    ;
    Mohd Firdaus Omar
    ;
    Tijjani Adam
    ;
    Al-rashdi A.A.
    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.
      3  9