|
Polyaryletherketone
Polyaryletherketone (PAEK) is a family of semi-crystalline thermoplastics with high-temperature stability and high mechanical strength whose molecular backbone contains alternately ketone (R-CO-R) and ether groups (R-O-R). The linking group R between the functional groups consists of a 1,4-substituted aryl group.. Properties PAEK has a continuous operating temperature of and under short-term loads can function up to . When burned it has the least toxic and corrosive fumes. It also has a low heat output when burned, so it qualifies for use in interior aviation applications. It also has good overall chemical resistance.. It has a tensile strength of and a Young's modulus of . Its yield strength is at and at . It does not break in an un-notched Izod impact test.. Chemistry PAEK plastics are characterized by phenylene rings that are linked via oxygen bridges (ether and carbonyl groups (ketone)). The ratio and sequence of ether to ketones mainly affects the glass transition temp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PEKK
Polyetherketoneketone (PEKK) is a semi-crystalline thermoplastic in the polyaryletherketone (PAEK) family of polymers. It possesses high heat, chemical, and mechanical load resistance. PEKK has a glass transition temperature (Tg) of 162 °C. Applications Hexcel, Hexcel Corporation (Formerly Oxford Performance Materials) manufactures PEKK-based parts for Boeing for use in its CST-100 Starliner, Starliner space taxis, using 3D printing-based additive manufacturing. It has wide dental and medical applications. The parts are claimed to be as strong as Aluminium, aluminum while being 40 percent of the weight. In addition, PEKK manufactured components have shown fire and radiation resistant properties. References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
