Browsing Hakimah Osman, Associate Prof. Dr. by Author "hakimah@unimap.edu.my"
Now showing items 1-14 of 14
-
A comparative study on curing characteristics, mechanical properties, swelling behavior, thermal stability, and Morphology of feldspar and silica in SMR L vulcanizates
Hakimah, Osman, Dr.; Azlan, Ariffin; Hanafi, Ismail, Prof. Dr. (Taylor Francis Inc, 2005)Comparison studies on effects of feldspar and silica (Vulcasil C) as a filler in (SMR L grade natural rubber) vulcanizates on curing characteristics, mechanical properties, swelling behavior, thermal analysis, and morphology ... -
Curing characteristics, fatigue and hysteresis behaviour of feldspar filled natural rubber vulcanizates
Hakimah, Osman, Dr.; Hanafi, Ismail, Prof. Dr.; Azlan, Ariffin (Taylor and Francis Inc., 2007)Curing characteristics, fatigue, and hysteresis behaviour of feldspar filled SMR L vulcanizates and feldspar filled ENR 50 vulcanizates were studied. Two different types of natural rubber, SMR L and ENR 50 having 0 and 50 ... -
The effect of feldspar loading on curing characteristics, mechanical properties, swelling behaviour and morphology of natural rubber vulcanizates
Hakimah, Osman, Dr.; Azlan, Ariffin; Hanafi, Ismail, Prof. Dr. (Taylor and Francis Inc., 2005)Feldspar is being used herein as a filler in natural rubber vulcanizates. Two different types of natural rubber, SMR L and ENR 50 having 0 and 50 mol% of epoxide groups and semi-efficient vulcanization were used. The scorch ... -
Effects of Durian seed flour on processing torque, tensile, thermal and biodegradation properties of polypropylene and high density polyethylene composites
Hakimah, Osman, Dr.; Muhammad Haniff, Zakaria (Taylor and Francis Inc., 2012)Composites containing various percentage of durian seed flour (DSF) in the polypropylene (PP) and high density polyethylene (HDPE) have been compounded using an internal mixer. The processing torque, tensile, thermal and ... -
Effects of maleic anhydride polypropylene on tensile, water absorption, and morphological properties of recycled newspaper filled polypropylene/natural rubber composites
Hakimah, Osman, Dr.; Hanafi, Ismail; Mariatti, Mustapha, Prof. Ir. (SAGE Publications, 2010)This study focused on the effects of maleic anhydride-grafted polypropylene (MAPP) on tensile, water absorption, and morphological properties of recycled newspaper (RNP) filled polypropylene (PP)/natural rubber (NR) ... -
Effects of natural weathering on properties of recycled newspaper-filled polypropylene (PP)/natural rubber (NR) composites
Hakimah, Osman, Dr.; Mariatti, Jaafar, Assoc. Prof. Dr.; Hanafi, Ismail. Prof. (Taylor & Francis, 2008)Natural weathering has been applied to investigate the properties of recycled newspaper (RNP)-filled polypropylene (PP)/natural rubber (NR) composites. Three sizes of RNP (11 mm, 23 mm, and 53 mm) were used in this study. ... -
Hybrid-filler filled polypropylene/ (natural rubber) composites: effects of natural weathering on mechanical and thermal properties and morphology
Hakimah, Osman, Dr.; Mariatti, Jaafar, Assoc. Prof. Dr.; Hanafi, Ismail. Prof. (Wiley, 2008)Comparison was made between the properties of recycled newspaper (RNP)/carbon black (CB) and recycled newspaper (RNP)/silica hybrid filled polypropylene (PP)/natural rubber (NR) composites. The properties studied were ... -
Mechanical and thermal properties of coconut shell powder filled polylactic acid biocomposites: effects of the filler content and silane coupling agent
Hakimah, Osman, Dr.; Chun, Koayseong; Salmah, Husseinsyah Ismail (Springer Netherlands, 2012)The effects of the filler content and the coupling agent 3-aminopropyltriethoxysilane (3-APE) on the mechanical properties, thermal properties, and morphologies of polylactic acid (PLA)/coconut shell powder (CSP) biocomposites ... -
Modified cocoa pod husk-filled polypropylene composites by using methacrylic acid
Koay, Seong Chun; Salmah, Husseinsyah, Prof. Madya Ir. Dr.; Hakimah, Osman, Dr. (North Carolina State University, 2013-08)The effect of filler modification using methacrylic acid (MAA) on polypropylene (PP)/cocoa pod husk (CPH) composites was studied. The performances of unmodified and modified PP/CPH composites were analyzed for torque ... -
Polypropylene/natural rubber composites filled with recycled newspaper: Effect of chemical treatment using maleic anhydride-grafted polypropylene and 3-aminopropyltriethoxysilane
Hakimah, Osman, Dr.; Hanafi, Ismail, Prof.; Mariatti, Mustapha, Prof. Ir. (Society of Plastics Engineers, 2012-04)A study on effect of chemical treatment using maleic anhydride-grafted polypropylene (MAPP) and 3-aminopropyltiethoxysilane (3-APE) was investigated. The performance of the MAPP and 3-APE were investigated by means of ... -
Properties of coconut shell powder-filled polylactic acid ecocomposites: Effect of maleic acid
Koay, Seong Chun; Salmah, Husseinsyah, Prof. Madya Ir. Dr.; Hakimah, Osman, Dr. (Society of Plastics Engineers, 2013-05)Ecocomposites were produced by incorporating coconut shell powder (CSP) into polylactic acid (PLA) resin. The effect of filler content and chemical modification on the mechanical properties, thermal properties, and morphology ... -
A Simple Method for the Production of Pure Crystalline Silica from Lemon Grass
Mohamed Yusof, Nur Firdaus; Hakimah, Osman; Metselaar, Hank S. C.; Rozyanty, A. Rahman (North Carolina State University, 2016)Lemon grass is an inexpensive raw material that can be used to produce natural silica. A method using hydrochloric acid (HCl) leaching followed by thermal combustion at 600 °C was developed to produce purified silica from ... -
Surface modification of coconut shell powder filled polylactic acid biocomposites
Salmah, Husseinsyah Ismail; Chun, Koayseong; Hakimah, Osman, Dr. (SAGE Publications Ltd, 2013)The acrylic acid was used as chemical modifier to improve the properties of coconut shell powder (CSP) filled polylactic acid (PLA) biocomposites. The effects of filler content and acrylic acid on tensile properties, thermal ... -
Tensile properties of polypropylene/cocoa pod husk biocomposites: Effect of maleated polypropylene
Koay, Seong Chun; Salmah, Husseinsyah, Prof. Madya Ir. Dr.; Hakimah, Osman, Dr. (Trans Tech Publications, 2013)Polypropylene/Cocoa Pod Husk (PP/CPH) biocomposites with different maleated polypropylene (MAPP) content were prepared via melt blending process using Brabender Plastrograph mixer. The tensile strength and tensile modulus ...