Melt Processing of Polyacrylonitrile (PAN) Polymers (original) (raw)

Abstract

Carbon fibers are finding a wide variety of applications in the industrial sector, which encompasses the high-tech aerospace and defence areas, increasingly the shipping, sporting and medical fields as well. One of the major shortcomings that limit the potential widespread use of carbon fibers in commercial applications is their prohibitive cost in comparison with other structural materials like glass fibres and steel. Polyacrylonitrile (PAN) polymer degrades before melting and thus melt spinning is not preferred. Current carbon fiber productions from acrylic fibers employ wet or dry spun PAN-based precursors that require expensive solvents and costly solvent recovery methods causing environmental pollution. Melting point of PAN can be reduced by disturbing intra and interchain interaction between nitrile groups. This can be achieved by incorporating suitable comonomers or by using plasticizers like water or organic solvents. Thus melt spinning becomes feasible and production cost c...

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