We have studied the effect of intrinsic viscosity of acrylonitrile-methyl methacrylate copolymer on the structure and mechanical characteristics of polyacrylonitrile (PAN) fibers. The fiber properties are determined for different values of thermal stretch. The tensile strength and Young's modulus of PAN fibers increase as the intrinsic viscosity of the copolymer increases. The increase in intrinsic viscosity is accompanied by an increase in the content of the paracrystalline phase, the degree of ordering. and the molecular orientation.
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References
1.
Chari, S.S., Bahl, O.P., and Mathur, R.B., Characterisation of Acrylic Fibres Used for Making Carbon Fibres, Fibre Sci. Technol.15, 153 (1981).
2.
Dems. A., Private communication, 1984.
3.
Mikolajczyk, T., and Krucińska . I., Correlation Between Copolymer Characteristics, Conditions of Fiber Formation, and Mechanical Properties of PAN Carbon Fiber Precursor, Part I: Effect of Intrinsic Viscosity Distribution in Copolymer on Mechanical Properties, Textile Res. J.59, 536-540 (1989).
