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Fibers and composites
Fibers and composites
Date: 13 April 2011, 17:32

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Mesophase carbon fiber was invented in the 1970s, independently and simultaneously, from our viewpoint today, by Leonard Singer in the US (Singer, 1978) and by Sugio Otani in Japan (Otani, 1981). Both based their concepts on the role of the liquid-crystalline carbonaceous mesophase described by Brooks and Taylor in 1965. Both recognized two key steps: flow of the anisotropic liquid in the shear-stress field of the spinneret to align the disklike molecules, and oxidation thermosetting to stabilize the shape and microstructure of the fiber prior to carbonization. These inventions led to high expectations in the carbon materials community for the rapid attainment of fiber with superior properties at the low costs anticipated for a pitch product. Vigorous research activities ensued, many under conditions of proprietary secrecy.

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