Some Components Used in Polymer Composites

To Improve Mechanical Properties To Improve Thermal Properties and Electrical Conductivity To Reduce Friction [Pg.213]

Textile fibres Silver powder PTFE powder [Pg.213]

Metal powders Metal oxides Sintered metal reinforcement Mica Asbestos (obsolete) Sintered bronze matrix PTFE fibres [Pg.213]

The fibres generally used for polymer reinforcement are glass, carbon and less often PTFE or metals. For use in thermosets, glass or carbon fibre may be used in the form of a pressed mat, or bundles of fibres may be laid in a preferred orientation. This enables anisotropic properties to be obtained where this is beneficial. The alternative is to disperse chopped fibres randomly in the polymer matrix. This gives [Pg.213]

Like other composite properties, the wear resistance is influenced by the orientation of reinforcing fibres. Sung and Suh found that with biaxially-oriented glass fibre and molybdenum disulphide in a PTFE matrix (Duroid 5813), the wear resistance was greatest when the highest proportion of fibre was normal to the sliding surface. The same effect was found with a graphite fibre/epoxy composite and a Kevlar fibre/epoxy composite. [Pg.214]

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