کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5186402 | 1381103 | 2007 | 18 صفحه PDF | دانلود رایگان |
The mechanical properties of PEEK 450G have been extensively investigated. The compressive properties were measured at strain rates between 1 Ã 10â4 and 3000 sâ1 and temperatures between â85 and 200 °C. The tensile properties were measured between the strain rates of 2.7 Ã 10â5 and 1.9 Ã 10â2 sâ1 and at temperatures between â50 and 150 °C. The Taylor impact properties were investigated as a function of velocity and various large-strain compression tests were undertaken to explain the results. The fracture toughness was investigated as a function of temperature and compared with previous literature. Additionally, the fracture surfaces were studied by microscopy. As with all semi-crystalline polymers the mechanical response is a strong function of the strain rate and testing temperature. A previously reported phenomenon of darkening observed in Taylor impacted samples is shown to be due to reduced crystallinity brought about by large compressive strain. For samples deformed to large compressive strains using a variety of techniques and strain-rates the measured Vickers hardness was found to decrease in accordance with reduced crystallinity measured by other techniques.
Journal: Polymer - Volume 48, Issue 2, 12 January 2007, Pages 598-615