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- W2027431488 abstract "Fibers were spun from five different wholly aromatic ordered copolyamides. Each polymer contained units derived from aminobenzoic acids, arylene diamines, and arylene diacids. Structural differences in the ordered copolyamides were made by variations in combinations of para- and meta-phenylene units, 2,6-naphthalene units, and 4,4′-bi-phenylene units. Tensile properties of the fibers were obtained at standard conditions, at elevated temperatures, and after heating at 300°C. in air. All of the fibers had tenacities of about 6 g./den. and all were crystalline after drawing. Easy of crystallization, initial modulus, elongation, and retention of tensile properties at elevated temperatures in air were, in general, consistent with variations in the structure of the polymers. Fiber properties were retained to a high degree at temperatures up to 400°C., and fibers heat aged at 300°C. showed remarkable retention of tensile properties. Radiation resistance (γ source, 2.92 × 105 rads/hr.) of these fibers was good and resistance to ultraviolet light appeared to be better than that of unstabilized nylon 66." @default.
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- W2027431488 date "2007-03-07" @default.
- W2027431488 modified "2023-09-25" @default.
- W2027431488 title "Aromatic ordered copolyamides for temperature-resistant fibers" @default.
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- W2027431488 doi "https://doi.org/10.1002/polc.5070190104" @default.
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