Düşük sıcaklıkta yüksek darbe dayanımına sahip cam ve karbon elyaf takviyeli iletken poliamid 6 ve poliamid 66 karışımlarının hazırlanması

Synthetic polyamides, among the engineering plastics, are used in many applications. The main characteristics of polyamides are high abrasion resistance, good mechanical properties even at high temperatures, low gas permeability and chemical stability. In some applications, nylon composites reinforced with glass particles or fibers and show higher structural resistance, impact resistance and hardness. Although the most used polyamides, polyamide 6 and polyamide 6,6 exhibit similar properties, they have different melting points (polyamide 6- 223°C, polyamide 6,6′-255°C). In general, polyamides are completely insulators. The present work aims at conducting polymer composites technology based on fiber-reinforced polyamides, which are used from automotive industry to electronics. While conducting polymers are used widely recently, it becomes more widespread with new and unique works. In this work, our purpose was to develop a material, which can show high impact resistance and conductivity even at very hard conditions for polymeric materials, such as gear and mile application instead of standard type conductors, semiconductors and antistatic materials. In this scope, polyamide (PA) was used as a high strength polymer material. Carbon black, graphite, carbon fiber, and recycled carbon fibers were used to provide electrical conductivity. Composites obtained differently from standard type applications showed high impact resistance at low temperatures (-40oC). The required mixture was prepared with double screw extruder and the required test plates were molded by injection. Mechanical properties of materials have been studied by tensile test and impact test. In the study, the highest elasticity module and the tensile strength at break values were obtained with 30% carbon fiber addition. The best result was measured in the mixture prepared with a combination of 30% glass fiber and 10% graphite at -40oC. For electrical conductivity, surface resistance of the mixtures is measured by the Kethyle brand device. The lowest surface resistance required for conductivity was seen in the addition of 30% carbon fiber as 10² ohms.