Electrical and mechanical properties of carbon black reinforced high density polyethylene/low density polyethylene composites

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2004

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Altıntaş, Bekir

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In this study, the High Density Polyethylene (HDPE) and Low Density Polyethylene (LDPE) blends prepared by Plasticorder Brabender were strengthened by adding Carbon Black (CB). Blends were prepared at 190 °C. Amounts of LDPE were changed to 30, 40, 50 and 60 percent by the volume and the percent amounts of CB were changed to 5, 10,15, 20 and 30 according to the total volume. Thermal and morphological properties were investigated by using Differential Scanning Calorimeter (DSC), Scanning Electron Microscope (SEM). Mechanical properties were investigated by tensile test and hardness measurements. Melt flow properties were studied by Melt Flow Index (MFI) measurements. Electrical conductivities were measured by four probe and two probe techniques. Temperature dependence of electrical conductivity was also studied. In general, it is observed that stress at break and MFI values decrease by the addition of CB; however, modulus and hardness increase. DSC results indicated that the crystallization of the polymer blend was decreased by the addition of CB. SEM results showed that the components were mixed homogenously. Increasing CB content increased electrical conductivity. Furthermore, by increasing the temperature, positive temperature coefficient behavior was observed which increases when CB content decreased.

Subject Keywords

Polymers.

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http://etd.lib.metu.edu.tr/upload/2/12604976/index.pdf
https://hdl.handle.net/11511/14196

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

B. Altıntaş, “Electrical and mechanical properties of carbon black reinforced high density polyethylene/low density polyethylene composites,” M.S. - Master of Science, Middle East Technical University, 2004.