Firuz Zainuddin, Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34345
2024-03-29T05:00:52ZAluminium/floral foam laminated composites under flexural and compression test
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35576
Aluminium/floral foam laminated composites under flexural and compression test
Sinar Arzuria, Adnan; Nurfarahain, Dzainal; Firuz, Zainuddin, Dr.; Nur Azni, M. A.
This study is concerned on evaluation of laminated composites of aluminium (Al) sheet and floral foam (FF) under flexural and compression test. Effect of different layers of Al/FF laminated composites was evaluated. Epoxy and hardener was used as the adhesive to bind the surface between the Al sheet and FF. The information on the functional group that exists in FF during the formation of the foam was verified by Fourier Transform Infrared Spectroscopy (FTIR) analysis. From flexural and compression test, the mechanical properties decreased with the increasing number of layers of Al/FF laminated composites. The load cannot be distributed uniformly across the composite layer thus results in failure. Optical Microscope (OM) was used to see the adhesion between the layers of Al/FF laminated composites. One layer (1L) of Al/FF shows good adhesion while for four layer (4L) of the composites show phase separation and the excess adhesive around the interface. This shows that the adhesion between the layers also contribute to the failure of the laminated composite. FTIR analysis shows that the FF consists of amine group (at 3587.95 cm-1), alcohol group (at 3305.35 cm-1) and alkyl group (>900 cm-1) which is the main functional group found in polyurethane foam.
Link to publisher's homepage at http://www.ttp.net/
2014-04-01T00:00:00ZPreparation and characterizations of palm oil based rigid nanocomposite polyurethane foam
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/35572
Preparation and characterizations of palm oil based rigid nanocomposite polyurethane foam
Firuz, Zainuddin, Dr.; Sahrim, Ahmad; Rozaidi, Rasid; Syed Nuzul Fadzli, Syed Adam
The objective of this research is to study and analyze the basic and mechanical properties of polyurethane (PU) foam. PU foams were initially synthesized with reaction of natural oil polyol and isocyanate with ratio of 1:1.1 by weight. Water was used as the blowing agent and appropriate surfactant and catalyst were added to ensure better performance of final product. Cloisite 30B was added as filler and the percentages were varied from 1 to 5 wt%. The basic properties of polyurethane foams were determine, such as free rise density (FRD), foaming time and rheological index. Clay dispersion in polyurethane nanocomposites was investigated by X-ray diffraction method. Mechanical properties of foams were evaluated using uniaxial compression test where the energy absorption values were determined. Aluminium-polyurethane foam (Al-PU) sandwich composite was prepared and flexural test was carried out to examine the effect of skin attachment to PU foam. The results showed that with increasing nanoclay content resulted an increment in FRD to 74.6 kgm -3 , rheological index to 1.07gcm -1 and foaming by almost 133% for the addition of 5wt% nanoclay, respectively. Increasing in percentages of nanoclay filler in PU foam nanocomposite is also found to improve the absorption energy from 89J for pure PU foam to 118J for PU foam with 5wt% nanoclay. It was found that PU foam nanocomposite has better failure deformation as compared to sandwich composite with flexural extension that increase up to 9.4mm. However, flexural stress for sandwich composite are higher up to 3.6MPa. Furthermore, Al sheet acts as ductile skin to PU foam and prevent samples from rupture rapidly or prevent the formation of brittle fracture.
Link to publisher's homepage at http://my.masshp.net/
2010-01-01T00:00:00ZCharacterization and mechanical properties of biomass polyurethane
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34415
Characterization and mechanical properties of biomass polyurethane
Nur Azni, M. A.; Sinar Arzuria, Adnan; Firuz, Zainuddin, Dr.
In this work, turmeric (Curcuma Longa) and henna (Lawsonia inermis) has been used as filler to rigid polyurethane (PU) foam. Characterization and mechanical properties of biomass polyurethane has been investigated using free rise density and compression test. The percentages of fillers were varied from 2 to 10% by weight. PU foam was prepared by reaction of natural oil polyol and isocyanate with a ratio of 1 to 1.1 by weight. The mixture was stirred with 2000 rpm and was poured into the mould when mixture starting to expand. Free rise density (FRD) by stirring polyol and isocyanate in paper cup according to ASTM standard. FRD of foam will be increase when increasing filler loading. Mechanical properties of foams were evaluated using uniaxial compression test to determine compression strength of composites. Compression strength of PU/henna(H) shows the highest strength while PU/turmeric(T) is the lowest. PU/H have highest compression when filler loading increase to 6 percent and decrease with next formulation which is 8 and 10 percent due to agglomeration. Eventhough PU/T have low compression strength, the trend of compression strength is vary from PU/T which showing the optimum strength at 2 percent of filler loading.
Link to publisher's homepage at http://www.aensiweb.com
2013-10-01T00:00:00ZProperties of recycled high density polyethylene/recycled polypropylene blends : Effect of maleic anhydride polypropylene
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34383
Properties of recycled high density polyethylene/recycled polypropylene blends : Effect of maleic anhydride polypropylene
Maryam Atiqah, A.A.S.; Salmah Husseinsyah, Prof. Madya Ir. Dr.; Firuz, Zainuddin; Du Ngoc, Uy Lan
Polymer blending provides an efficient way to develop new materials with improved properties while preserve the primary properties of the materials at lower cost. The blends recycled high density polyethylene (rHDPE) and recycled polypropylene (rPP) with and without maleic anhydride polypropylene (MAPP) have been investigated. The effect of different blend ratios on tensile properties, morphology and melt flow index were studied. The tensile strength and modulus of elasticity of both blends increased with increased of rPP in the blend ratios but the elongation at break decreased. It was found that the tensile strength and modulus of elasticity of compatibilized rHDPE/rPP blends higher than uncompatibilized blends. The SEM micrograph of tensile fractured surface of compatibilized blends showed better interfacial adhesion and interaction between rHDPE and rPP. The melt flow index of compatibilized blends showed better flowablity than uncompatibilized blends.
Link to publisher's homepage at http://www.ttp.net/
2014-01-01T00:00:00Z