A COMPARATIVE EXPERIMENTAL STUDY ON TENSILE PROPERTIES OF THREE TYPES OF HIGH-PERFORMANCE POLYMER FIBERS

摘要

A comparative experimental study on tensile properties of three types of high-performance polymeric fiber yarns -AuTx™, Kevlar~® KM2 600 denier and Twaron~® 500 denier - is conducted. Tensile tests are performed on samples of the three kinds of fiber yarns at five testing temperatures (24, 50, 60, 70 and 80 °C) and three loading rates (100, 200 and 300 mm/min). The elastic modulus, breaking stress, and breaking strain are obtained for each type of fiber yarns under specified testing conditions as averages of measured values from 15 specimens. The experimental data reveal that the tensile properties of all three types of fiber yarns under investigation exhibit strong temperature dependence, with the elastic modulus and breaking stress decreasing with the temperature increase. However, the dependency of the properties on the loading rate is insignificant for the range considered. The measured tensile properties of the Kevlar~® and Twaron~® yarns are seen to be close, while the elastic modulus and breaking stress of the AuTx™ yarn are ound to be, respectively, about 12% and 40% higher than those of the Kevlar~® and Twaron~® fiber yarns. It is also observed that the AuTx™ yarn degrades about two times faster than the other two yarns as temperature increases.