Physicochemical properties of kevlar 49 fiber

✍ Scribed by Lynn Penn; Fred Larsen

• Publisher: John Wiley and Sons
• Year: 1979
• Tongue: English
• Weight: 928 KB
• Volume: 23
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1979.070230106

✦ Synopsis

The high-strength, high-modulus Kevlar 49 fiber is widely used today because of its superior properties. In this paper, we discuss the fundamental physicochemical nature of the commercial fiber. I t is an extended chain polymer, poly(p-phenylene terephthalamide), which is highly crystalline. Extensive analysis shows that the material composition is quite consistent from lot to lot and is low in impurities. The fiber absorbs water reversibly; the extent of absorption is related to the ash content. The well-known interaction of the fiber with ultraviolet light is illustrated with spectra, and the thermal stability of the fiber is demonstrated with various thermal analysis techniques.