Composites graphite fiber

J. Dehnonte, Technology of Carbon and Graphite Fiber Composites, Van Nostrand Reinhold Company, New York, 1981, p. 398. 

The water hberated during the cure has no apparent effect on the composite properties. Glass-filled composites prepared in this manner retain mechanical properties at elevated temperatures as well as solvent and flammabiUty resistance (88). PhenoHc-graphite-fiber composites that exhibit superior mechanical properties have also been prepared by this process. 

Drzal, L.T., Rich, M.J., Camping, J.D. and Park, W.J. (1980). Interfacial shear strength and failure mechanisms in graphite fiber composites. In 35th Annual Tech. Conf., Reinforced Plast. Compo.sites Inst., SPI, Paper 20C. 

Russell, A.J. and Street, K.N. (1987). The effect of matrix toughness on delamination static and fatigue fracture under mode I and II shear loading of graphite fiber composites. In Toughened Composites. ASTM STP 937 (N.J. Johnston ed.). ASTM, Philadelphia, PA, pp. 257-294. 

Asbestos fibers are found worldwide in many products as reinforcement in cement water pipes and the inert and durable mesh material used in filtration processes of chemicals and petroleum, for example. However, asbestos is not the only inorganic fiber in use today. Synthetic inorganic fibers abound. Glass fibers have replaced copper wire in some intercontinental telephone cables. Fiberglas (a trade name) has become the insulation material of choice in construction. Carbon and graphite fiber composites are favored materials for tennis racket frames and golf clubs. Fibrous inorganic materials have become commonplace in our everyday lives. 

The standard ASTM D2585 filament wound pressurized bottle test method utilizes a 0.15-m (5.75-in.)intemal diameter filament wound bottle as the test article. This standard test method (with variation in bottle sizes) has been used extensively by the rocket motor industry [47-50] to evaluate glass, aramid, and graphite fiber composite vessel performance. This test method has generally shown good results, but is a relatively expensive test method. Testing of one 0.5-m (20-in.) diameter bottle can cost up to 20K. Other disadvantages are ... 

If both substrates to be bonded are nonconducting, then the adhesive formulation must contain a susceptor material. Susceptors can have a small percentage of magnetic iron oxide, iron filings, or carbon additives. A susceptor can also be a steel screen or perforated steel foil that is embedded in the adhesive bond line. It has been found that graphite fiber composites used in the automotive and aerospace industries are sufficiently conductive that they can be successfully heated with induction. Design considerations must be taken into account in placement of the graphite reinforcement, so that the material heats uniformly. 

A Review of the Interfacial Phenomena in Graphite Fiber Composites, K. Wolf, R. E. Fornes, J. D. Memory, and R. D. Gilbert A Palladium-Catalyzed Conversion of Amorphous to Graphitic Carbon, W. L Holstein, R. D. Moorhead, H. Poppa, and M. Boudart... 

Finally, the basic Adhesive B formulation was toughened using the MEAc core-shell polymer and used as the matrix for an epoxy-graphite fiber composite. The mode II interlaminar fracture toughness, GIIc, was increased from 500 J/m2 to 890 J/m2 by the presence of the acrylic core-shell toughener. 

Aromatic nitriles may be trimerized at moderate temperature and pressure with p-toluenesulfonic acid as catalyst. Studies were conducted to establish the effect of the reaction temperature, pressure, time, and catalyst concentration on yield of the trimerized product. Trimerization studies were also conducted to establish the effect of substituting electron donating or withdrawing groups on benzonitrile. Preliminary results of using the catalytic trimerization approach to prepare s-triazine cross-linked polyimide/graphite fiber composites are presented. 

Figure 12.14. Fracture toughness of PPO composites, (a) PPO resin (b) 20% A-1100 glass-fiber composite (c) 20% glass-fiber composite (d) 20 % graphite-fiber composite (e) 20 % glass-bead composite (f) 20 % A-llOO glass-bead composite. The term A-llOO refers to the silane used as a coupling agent. (Trachte and DiBenedetto, 1971.)...

Some methods have been attempted to improve the capacitance and conductivity of carbon-based supercapacitors. For example, fabrication of a CP/graphite fiber composite with PPy has been done by using electrochemical polymerization of Py on the surface of graphite fiber and shows higher capacitance and conductivity. ... 

Figure 7.10 Capacitance of PPy/graphite fiber composite electrode in 1 M KCl at a 10 mV/s sweep rate. Reprinted with permission from Ref. 200. Copyright 2002 Elsevier Science B.V.

How would you rate the thermooxidative stability of the high temperature polymers Recent work showed PMR-15/graphite fiber composites to have good thermal stability but poor thermooxidative stability. The composite is protected by the graphite fiber. 

Lo J, Finello D, Schmerling M, Marcus HL, Interface structure of heat treated aluminum-graphite fiber composites, JE Hack, Amateau MF eds.. Mechanical Behaviour of Metal-Matrix Composites, The Metallurgical Society of AIME, Warrendale, 77, 1983. 

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