Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 49 for “"impact strength"”.
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Rotational Molding of Acrylonitrile-Butadiene-Styrene Polymers and Blends
… namely discoloration, bridging, and poor impact strength. It is believed that these effects are due to degradation of the carbon-carbon double bond in the butadiene, through attack by either oxygen or heat. Previous efforts have shown some success in addressing these issues. However, …
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Improving Impact Properties of Novatein through Polymer Blending and Reactive Extrusion
… thermoplastic made from protein and requires impact strength modification before it can be used in a wider variety of applications, such as in the agricultural, horticultural and meat processing industries. Polymer blending is often used for improving material properties cost effectively. This …
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Structure-property characterisation of ternary phase polypropylene composites
… While the mechanical tests included tensile and impact measurements at ambient temperature, and a fracture toughness test based on the J-integral method carried out at -20 oC. EPR and glass beads were found to influence the structure and properties of polypropylene in different ways. …
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Characterization and development of polycaprolactone (PCL)/montmorillonite (MMT)/hydroxapaptite (HA) nano-composites for fused deposition modelling (FDM) process
… were assessed by tensile, flexural and charpy impact tests while the thermal properties were studied via differential scanning calorimetry (DSC) and thermogravimetry analyzer (TGA). Simulated body fluid (SBF) test was used to assess the bioactivity properties of the composites. The filament …
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Mechanical Performance of Industrial Hemp Fibre Reinforced Polylactide and Unsaturated Polyester Composites
… fibre treatment and fibre/matrix interfacial strength on the mechanical properties of industrial hemp fibre reinforced polylactide (PLA) and unsaturated polyester (UPE) composites. Surface treatment of hemp fibres was investigated as a means of improving the fibre/matrix interfacial strength …
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Exploration of plastic pallets using various fillers on graphite nanoplatelets/polypropylene composites
… in a significant enhancement in the mechanical strength (tensile, impact, and flexural strength) and thermal decomposition temperature compared to the neat PP specimen. The CPC process clearly shows good exfoliation and better distribution on the PP matrix compared to the PMC method based on …
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Characterization of natural fibre reinforced biodegradable composities
… light weight, recyclability, and high specific strength of natural fibres make them a good replacement for synthetic fibre such as glass in fibre reinforced plastics (FRP). Green and ecofriendly source of these fibres offer less reliance on oil sources. However, their moisture uptake ability, …
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2 dimension woven kenaf reinforced unsaturated polyester composite
… and showed that satin 8/3 has highest tensile strength of 39MPa and Plain has highest tensile modulus of 2.63GPa, with flexural strength and impact strength of 48MPa and 29kJ/m2 respectively. The use of VIP and UPE show a good infusion of resin between intra yarns but need much lower viscosity …
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Characterization and processing of composite PP/UHMWPE filament for fused deposition modelling application
… to FDM to manufacture tensile, flexural, and impact samples. This was done under the default setting of process parameters in order to investigate the mechanical behaviour of the composite. Structural morphology of the fracture surfaces of impact samples were investigated to explore …
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Structure and Properties of Polymer Blends
… technique (Rheovibron), stress-strain and impact measurements in the solid phase at room temperature (20 +- 1°C). The results showed that tensile strength, elongation at break, impact strength and tan§ (20°C) decreased with increasing PVC, PP and PS content. It was concluded that …
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The effect of chemical treatment, fibre length, fibre content and injection moulding parameters to uv irradiation resistance of oil palm fibre reinforced composites
… regression models were generated for tensile strength, strain at maximum stress, break stress, break strain and Charpy Impact strength based on six different UV exposure time i.e.: 0, 96, 336, 504, 1008, and 1512 hours. The significance of the regression models were tested by Analysis Of …
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The production of a plastic form sulfate lignin
… not treated at all had the highest relative impact strength. Stannous lignin was condensed with ½ mol, 1 mol, and 2 mols of formaldehyde in the presence of NaOH> All molded samples made from formaldehyde condensed lignin had very poor flow in the mold and very poor water absorption …
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Compatibilisation of heterogeneous polymer blends by reactive processing
… The SPD1 caused general decreased in tensile strength, albeit increased in drop impact strength particularly in blend containing high PS content (80%). The SPD2 was particularly effective in enhancing impact strength in blends containing low weight ratio of PP (<70%). The SPD2 was also a good …
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Investigation of the fracture phenomena during the milling process of inorganic particulates and brittle fracture of polymer composites using fractal theory
… of milled particulates, and relating the Izod Impact Strength values of composites of polypropylene and Calcium carbonate particulates which are large un-milled, small milled, as well as small and produced by the simultaneous milling and coating with nano-silica to the Surface Fractal Dimension …
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Nano-filled Epoxy: Mechanical and Fire Behavior and Modeling of Nanocomposite Columns Under Fire
… Fracture tests performed include Izod impact and fracture toughness, for the determination of the net Izod impact strength, the stress intensity factor, and the critical energy release rate. With static mechanical tests the tensile and flexural properties of the nanocomposites are …
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Harakeke fibre as reinforcement in epoxy matrix composites and its hybridisation with hemp fibre
… treated with NaOH/Na2SO3 retained their tensile strength and Young’s modulus compared to the untreated, while harakeke fibre treated with NaOH/Na2SO3 was degraded. Fibre surfaces and fibre separation were evaluated revealing that fibres treated with NaOH/Na2SO3 had better separation and rougher …
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Green composites from castor oil and renewable reinforcing materials: maleated castor oil-polystyrene matrix reinforced with greige fibre
… Mechanical tests - tensile, flexural and impact strength - were performed on the neat and reinforced polymer. Comparison tests (to determine mechanical properties) were also conducted on commercial general purpose polystyrene (GPPS) and high impact polystyrene (HIPS). Scanning electron …
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Moisture diffusion through neat and glass-fiber reinforced vinyl ester resin containing nanoclay
… amount of nanoclay in polymer. Tensile tests and impact tests were carried out to quantify the influence of nanoparticles on mechanical properties of nanocomposite samples. Tensile modulus was found to increase with increasing amount of nanoclay at all clay-loading levels. However, impact strength …
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A feasibility study on using surface treated kaolin mineral in thermoplastic composites
… that high aspect ratio fillers increase the strength and stiffness of the composite. Conversely, low aspect ratio particles improve impact strength. Furthermore, particle size affects the dispersion of the mineral, with minerals predicted to have a smaller particle size showing less …
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Polyolefin plastomers in composites for flooring applications
… carbonate-filled POP, which include tensile strength, elongation and impact strength, are found to compare very favourably to those of PVC formulations at filler loadings of 200 phr. In addition, the filled POP formulations are able to incorporate a significant amount of post-consumer …
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