Acrylonitrile polymer compositions and articles and methods...

Details Acrylonitrile polymer compositions and articles and methods... Acrylonitrile polymer compositions and articles and methods...

C - Chemistry, Metallurgy

08

F

C08F 220/44 (2006.01) C08J 5/18 (2006.01) C08J 9/12 (2006.01) C08J 9/14 (2006.01) C08K 5/00 (2006.01) C08L 33/20 (2006.01)

Patent

CA 2128541

ABSTRACT OF THE DISCLOSURE Process of mixing a fugitive plasticizer, e.g., ethylene carbonate, with moist particulate polyacrylonitrile then removing the water enabling adjustment of the melt viscosity for extrusion of the polyacrylonitrile into film, fiber, pellets and shaped articles. Stretching and heating the extruded polyacrylonitrile film or fiber causes the fugitive plasticizer to exude and vaporize from the film or fiber, carrying with it any remaining acrylonitrile monomer. The resulting film or fiber exhibits substantially increased molecular weight, thus enhancing the tensile strength and barrier properties of the polyacrylonitrile product. The process also produces polyacrylonitrile foam products. A novel cross-linking agent for polyacrylonitrile, divinyloxybutane, is disclosed. Thermostabilizing agents for polyacrylonitrile, N-maleimides and stilbene derivatives, are also disclosed.

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