In this study, mechanical properties of multiwalled carbon nanotubes / high density polyethylene (MWCNT/HDPE) nanocomposite materials produced by method of injection molding have been investigated experimentally. Multi-walled carbon nanotubes (MWCNTs) have been incorporated into a high-density polyethylene (HDPE) matrix using twin screw extrusion and injection technique. High density polyethylene, which was reinforced with different percentages (1%, 3% and 5%) of carbon nanotubes, was produced in the form of tensile test bars and then tested. The tensile tests were performed according to ASTM D 638 test standards. The increase in tensile strength as a result of the added carbon nanotube was studied. After the experiments, changes of mechanism at fracture surfaces were examined. Experiments were repeated three times. As a result, it could be inferred that minimum percentage of carbon nanotubes reinforcement should be between 1% 3%.
In this paper response surface methodology (RSM) was used to study the transesterification reaction of safflower for biodiesel production.Biodiesel is alternative fuel, with catalyst and alcohols reaction production, from vegetable oils, animal oils and waste fried oils.But there are fuel problems to be solved before biodiesel.These are storage time, storage conditions and cloudy and flow points which have flow peculiarity in the low heats.In this research, physical and chemical properties as a fuel of Safflower Methyl Ester (SME) which are biodiesel fuels are determined.In this research, method of transesterification is employed.Attitudes in storage time and storage conditions of SME are investigated.As a result, SME viscosity figures, according to measured dates, are below 40 Redwood min.at 40°C.Also the effects of outer temperature and fuel temperature on viscosity were found significant (P<0.01) by the performed variance analysis.
In this study, Multiwall Carbon Nanotubes (MWCNT) reinforced High Density Polyethylene (HDPE) materials were used. Mechanical properties of the samples reinforced with Carbon Nanotubes at weight ratios of 1%, 3% and 5% were investigated. Reinforced samples were compared to samples produced with pure High density Polyethylene. Samples were produced by plastic injection method. The samples were then subjected to experiments and impact resistance values were measured in accordance with ASTM D6110 standards. Also Thermogravimetric Analyses (TGA) was performed for and Multi-Wall Carbon Nanotubes within the High Density Polyethylene. At the end of the study, it was observed that impact resistance decreased with increasing carbon nanotube reinforcement amount. Impact resistance of samples produced by means of plastic injection was decreased by 35% comparing with samples produced from pure HDPE. These results were explained with the fact that structures of composite materials were transformed to a tougher and fragile phase. In the TGA investigations, it was seen that mass loss breakdown temperature and melting point temperature increased by MCWNT ratio in the composite samples.
Tires are important parts of every vehicle including tractors and other off-road vehicles.Thus, structural and operational characteristics determination of the tires is too important.Tire deflection and tire contact area are functions of tractive performance.In this study an electronic system was designed in order to determine deflection of the tire.Deflection and contact area experiments were conducted by means of single wheel tester.As a result; the effects on deflection of dynamic axle load and inflation pressure were found significant (P<0.01) by utilizing variance analysis.There was a linear relationship between deflection and contact area of tire.The deflection of the tire increased with dynamic axle load for all inflation pressures tested.The deflection decreased with increasing inflation pressure.Additionally, increase in the tire load and decrease in the tire inflation pressure lead to bigger the tire contact area.
In this study, mechanical properties of multiwalled carbon nanotubes / high density polyethylene (MWCNT/HDPE) nanocomposite materials produced by method of injection molding have been investigated experimentally. Multi-walled carbon nanotubes (MWCNTs) have been incorporated into a high-density polyethylene (HDPE) matrix using twin screw extrusion and injection technique. High density polyethylene, which was reinforced with different percentages (1%, 3% and 5%) of carbon nanotubes, was produced in the form of tensile test bars and then tested. The tensile tests were performed according to ASTM D 638 test standards. The increase in tensile strength as a result of the added carbon nanotube was studied. After the experiments, changes of mechanism at fracture surfaces were examined. Experiments were repeated three times. As a result, it could be inferred that minimum percentage of carbon nanotubes reinforcement should be between 1% 3%.
