Nylon carbon fiber composites

Future demand growth is tied to nylon growth. It is projected to be about 2% per year. However, cyclohexane s demand may increase greatly if nylon carbon fiber composites see accelerated use in the energy-efficient motor vehicles of the next... 

Akangah P, Lingaiah S and Shivakumar K (2010) Effect of Nylon-66 nano-fiber interleaving on impact damage resistance of epoxa/carbon fiber composite laminates. Compos Struct 92 1432-1439. 

Fig, 7.16, Impact fracture toughness (O) and interlaminar shear strength (ILSS, ) of carbon fiber-epoxy matrix composites with varying number of nylon sheets as delamination promoters. After Havre (1977). 

About 98% of the fibers employed in composites are glass (Sections 12.5 and 12.6), carbon (graphite, carbon fibers, etc. Section 12.16), and aromatic nylons (often referred to as aramids Section 4.8). New composites are emerging that employ carbon nanotubes and the fibers (Section 12.17). Asbestos (Section 12.13), a major fiber choice years ago, holds less than l%i of the market today because of medical concerns linked to it. 

While carbon fiber (thickness on the order of 1000 nm) composites offer very strong materials, carbon nanotubes make even stronger composites. These carbon nanotubes have aspect ratios of over 1000 (ratio of length to diameter). Further, because some carbon nanotubes are electrically conductive, composites containing them can be made to be conductive. A number of carbon nanotube matrixes have been made including using a number of engineering resins, such as polyesters, nylons, polycarbonates, and PPE. 

Next came acquisitions, funded in part by the divestitures, that reinforced the learning base in the paths that the firm had long followed. In films and fibers it purchased Exxon s carbon fiber business in 1984, Exxon s film composites activities in 1985, and Hercules s olefin fiber carpets in 1989. Later, in 1992, it traded its acrylic assets to ICI for the latter s nylon business, plus 41 million. In paints and finishes Du Pont obtained Ford s North American automotive paint division in 1986, followed by a joint venture with ICI to expand the same market in Europe, and one with Kami Paint to do so in Japan and East Asia. In agricultural chemicals it acquired Shell s agricultural chemicals division in 1986, and later in 1992 collaborated with Shell to develop specialized insecticides. For Du Pont, sustaining its technical and functional capabilities in long-established paths in which it was a competitive leader remained a basic strategy. ... 

Table 1 shows some examples of our basic research and new businesses. Toray commercialized nylon 6 fiber In 1950. The raw material, -caploractam, was produced by a conventional multi step proress at that time, but it has been today completely replaced by my invention. The business of carbon fiber and advanced composite materials was the outcome of basic research on oi anic synthesis using phosphorous compounds in our Basic Research Laboratories. Investigation in holography provided a researcher with the idea to use a holograph as a memoi, and the world-first Kanji-Printer was introduced in 1974, even though the memory was later replaced by a semiconductor. Our pharmaceutical business was initiated from basic research on interferon and biotechnologies. In 1985 we... 

An example of a typical material composition is the combination of a polymer and a filler. Because compounding is a techiuque that can complement the drawbacks of conventional polymers, it has been studied over a long period and its practical apphcations are well known. Reinforcing materials such as short-fiber are often used for compounding with thermoplastic polymers in order to improve their mechaiucal or thermal properties. Polypropylene and polyamide (nylon) are used for the thermoplastic polymers, while glass fiber and carbon fiber are mainly used as reinforcing materials. A few ttm... 

A. Baji, Y.-W. Mai, S.-C. Wong, M. Abtahi, and X. Du, Mechanical behavior of self-assembled carbon nanotube reinforced nylon 6,6 fibers. Composites Science and Technoly, 70 (9), 1401-1409,2010. 

Applied Composite Technology (ACT), Fayette, Utah, USA—manufacture composite products, a leading producer of prosthetic limbs. Also produce rifle and pistol barrels. AppUed Fiber Systems, Clearwater, Florida, USA— manufacture Towflex, which includes continuous carbon fiber powder coated with a variety of thermoplastics, such as Nylon-6, PP, PET, PES, PEI, PPS and PEEK, avaUable as a flexible towpreg suitable for hot filament winding. Acquired by Hexcel in April 2001. 

Janda, N. B. Keith, J. M. King, J. A. Perger, W. R Oxby, T. J. Shielding-Effeetiveness Modeling of Carbon-Fiber/Nylon-6,6 composites. J. Appl. Polym. Sci. 2005, 96, 62-69. 

Thermoplastic Polymers. Thermoplastic polymers do not require a cure cycle but need only to be melted during processing (usually injection molding). The most common are nylon, polypropylene, and polyethylene which are usually molded with 10-25 vol.% discrete (chopped) carbon fibers. The addition of fibers substantially increases the modulus and, to a lesser degree, the strength. Electrical conductivity is also considerably increased and many applications of these composites are found in electromagnetic-interference (EMI) shielding. 

Lin C-W (1993) Effect of moisture absorption on the impact behavior of unidirectional carbon fiber reinforced nylon 6 composite. In Chandra T, Dhingra AK (eds) Proceedings of the international conference on advanced composite materials (ICACM), Advanced composites 93, Wollongong, Australia, 15-19 February 1993, pp 597-602... 

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