Hamizah Md Rasid

Universiti Teknologi MARA | UiTM · School of Chemistry

Hydrogenation of liquid natural rubber (LNR) using 2,4,6-trimethyIbenzenesulfonylhydrazide (MSH) in toluene was studied. HLNR structure was characterized by nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FT1R). Response surface methodology (RSM) based on 5-level-2-factor central composite rotatable design (CCRD) was u...

A low-molecular-weight liquid epoxidized natural rubber (LENR) was prepared through photosensitized degradation of epoxidized natural rubber with 50 mol percent of epoxy content (ENR-50). LENR was modified into hydrogenated liquid epoxidized natural rubber (HLENR) via in situ thermal degradation of arylsulfonyl hydrazide as a hydrogenating agent. T...

The modification of liquid natural rubber (LNR) has attracted interests among chemists as it brings improvements to several of its properties and widens its application to various fields. LNR can be modified into fluorinated LNR (F-LNR) which is of interest to industries due to its remarkable properties, including low surface energies, high thermal...

Liquid natural rubber (LNR) was functionalized into liquid epoxidized natural rubber (LENR) and hydroxylated LNR (LNR-OH) via oxidation using a Na2WO4/CH3COOH/H2O2 catalytic system. Microstructures of LNR and functionalized LNRs were characterized using Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopies. The effec...

Liquid natural rubber (LNR) was synthesized via photosentisized degradation of natural rubber (NR). LNR was modified into epoxidized liquid natural rubber (LENR) and hydroxylated liquid natural rubber (LNR-OH) using Na 2WO4/CH3COOH/H2O2 catalytic system. Chemical structures of LNR and modified LNRs were characterized using Attenuated Total Reflecta...

Silica was extracted from power plant bottom ash by alkali fusion method and used to synthesize MCM-41 and SBA-15. As comparison, MCM-41 and SBA-15 were synthesized by using tetraethylorthosilicate (TEOS) as pure silica source. All synthesized MCM-41 and SBA-15 were characterized using X-ray Diffraction (XRD) and nitrogen adsorption to determine th...

This article reports an efficient, mild-temperature method for the hydrogenation of liquid natural rubber (LNR). The hydrogenation of LNR was studied using diimide generated in situ from the thermolysis of 2,4,6-trimethylbenzenesulfonyl hydrazide (MSH) in o-xylene at 100°C. The effects of reaction temperature, reaction time, solvent, and MSH/LNR we...

Liquid natural rubber (LNR) is a depolymerized natural rubber (NR) which consists of shorter polymeric chains and lower molecular weight ( M w < 10 5 ). Hydrogenated LNR (HLNR) was synthesized via the thermal decomposition of p -toluenesulfonyl hydrazide (TSH) or 2,4,6-trimethylbenzenesulfonyl hydrazide (MSH). The LNR and HLNR structures were...

A new material is prepared by encapsulating functionalized-MCM41 with 2-hydroxy-2-mercaptopyrimidine (2-thiouracil) and copper acetate monohydrate. The functionalized-MCM41 was first synthesized by using Ludox as silica source and cetyltrimethylammonium bromide (CTABr) as template and was modified via co-condensation method using 3-aminopropyltriet...

Thiourea complex encapsulated into functionalized-MCM41 was carried out in four stages. First stage is synthesized the MCM41 framework by using Ludox as silica source and Cetyltrimethylammonium bromide as surfactant. Second stage is modification of surface MCM-41 with organic group which is 3-aminoprophyltriethoxysilane. Next stage is encapsulation...

Mesoporous material MCM-41 with uniform hexagonally ordered pores in range of 2-10 nm was synthesized through hydrothermal method. The synthesis started from highly pure silica source known as Ludox which act as an active source of silica in the presence of organic surfactant (CTABr) as structure-directing agent. MCM-41 has been functionalized with...

MCM41 encapsulated with thiourea ligand and copper(II) acetate as catalyst for oxidation reaction is reported. First, MCM41 was modified using 3-aminopropyltriethoxysilane (APTES) and then was encapsulated with thiouracil and copper(II) acetate. The catalyst was characterized using X-Ray Diffraction (XRD), N 2 adsorption, single point BET, Fourier...