Process for preparing polyacrylonitrile filaments having...

Details Process for preparing polyacrylonitrile filaments having... Process for preparing polyacrylonitrile filaments having...

D - Textiles, Paper

01

F

18/612

D01F 6/18 (2006.01) B29D 7/00 (2006.01) D01D 5/00 (2006.01)

Patent

CA 1235267

ABSTRACT Polyacrylonitrile articles, such as filaments, tapes and films, having high tensile strength and modulus, and prepared by adding to a solution of polyacrylonitrile with a molecular weight above 3 x 105, pref. above 5 x 105, a minor amount of a bivalent metal compound, converting the solution into a solvent containing article, cooling this article to form a gel article, removing from this gel the solvent and metal compound, and stretching the resulting article at increased temperature. With this process filaments with a tensile strength above 1.2 GPa and a modulus above 16 GPa can be obtained.

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