Structure changes and tensile properties of poly(4,4 ’ -diphenyl- sulphone terephthalamide- co-3,3 ’ -diphenyl-sulphone terephthalamide) fiber during drawing process
The tensile properties of the high-temperature resistant Poly(4,4’ -diphenylsulphone terephthalamide-co-3,3’ -diphenylsulphone terephthalamide) (PSA) filaments were investigated by the temperature-controlled Stress-strain Tester. The effects of drawing rate, drawing ratio and drawing temperature on the tensile property were investigated by analyzing the characteristics of the tensile curves obtained at different drawing conditions. Development of structure and morphology for PSA as-spun filament during drawing process was studied by synchrotron wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) techniques. It is shown that the strength increased with the increase of drawing ratio until 2.2 while the corresponding elongation decreased. The tenacity of PSA filament enhanced when drawn at higher tensile rate until 30mm/min and reduced dramatically at tensile rate of 40mm/min. The effect of increasing the drawing temperature on tensile property equals to that of decreasing the drawing rate in the cold-drawing process. Analyzing the WAXD patterns shows that crystalline orientation of PSA as-spun filament improved significantly when drawn up to strain of 220% and it correlates very well with the morphology change suggested by SAXS results.
WU Wantao XIE Chao ZHANG Li ZHANG Yumei WANG Huaping
State Key Laboratory of Modification for Polymer and Fiber Materials, Donghua University, Shanghai, 201620, China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
504-506
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）