Properties Of Polyetheretherketone Composites Research Articles

Polyetheretherketone Composites with Appreted Carbon Fibers

The paper investigates the processes of carbon fiber surface treatment and their influence on the properties of polyetheretherketone composites. It has been shown that preliminary thermal activation of carbon fiber followed by treatment with a dressing agent - polyhydroxyether makes it possible to create polyetheretherketone composite carbon-filled materials with an increased level of physical and mechanical properties.

Study on Mechanical Properties of PEEK Composites

The tensile properties of polyetheretherketone (PEEK) composites, which were reinforced with short fibers, such as short carbon fiber (SCF), short glass fiber (SGF), or filled with polytetrafluoroethylene (PTEF), expanded graphite and nano material TiO2 were examined and studied. The weight content of short fibers, PTFE and expanded graphite was varied from 0-15%, and of TiO2 was varied from 0-8%. The results showed, with increasing of the weight content of short fibers, the tensile performance (tensile strength and modulus) of PEEK composites was increased rapidly. If the weight percent of short fibers was more than 10%, this increasing tendency became slowly. With the increasing of PTFE content, the tensile strength was increased at first and then decreased rapidly. However, the tensile modulus kept constant during the change of PTFE content. The influence of expanded graphite and nano particles TiO2 on mechanical properties of PEEK composites was also be studied here. Meanwhile, the reasons of different influence of these fillers were analyzed during microstructure changes of PEEK composites with SEM photographs.

Study on Properties of PEEK Composites Reinforced by SCF

Because of the excellent performance of Polyetheretherketone (PEEK), it is widely used in aerospace, mechanic, electronic and auto industry. Here the properties of injected molded PEEK composites reinforced by short carbon fiber (SCF), and the influence of SCF on the mechanical performance and thermal expansion performance were studied. It was indicated how the mechanical and thermal performance were changed with SCF content. Also the microstructure of PEEK composites was studied by taking SEM photographs. The results showed, in the here studied range of SCF content, the mechanical performance of PEEK composites rapidly increased with the increasing of SCF content. While the weight percent of short fibers was more than 10%, this increasing tendency became slow. SEM photographs showed, the interaction between base material PEEK and SCF was good, that because SCF could be good connected with PEEK base material, and the filling with SCF could also decrease the thermal expansion coefficient of PEEK composites.

Effect of Coupling Agent on the Mechanical, Thermal, Electrical, Rheological and Morphological Properties of Polyetheretherketone Composites Reinforced with Surface-Modified Mica

The mica fillers reinforced Polyetheretherketone (PEEK) composites were fabricated using compression molding technique. The mica surface was chemically modified using vinyltrimethoxy silane and 3–Aminopropyltriethoxy silane. The properties of treated mica PEEK composites were examined in terms of scanning electron microscopy, dynamic mechanical thermal analysis, differential scanning calorimetry and rheological behavior. The modified mica was observed to disperse more uniformly than the unmodified counterpart. The tensile strength and modulus also improved with treated mica filled PEEK composites. The increment of the dynamic modulus for the PEEK/treated mica composites is 82% at 250°C, indicating apparent improvement of high temperature mechanical properties.