The use of a hybrid method of dry-jet solution spinning and gel spinning led to the production of polyacrylonitrile-based precursor fiber with exceptional strengths, utilizing a high molecular weight (HMW) copolymer (weight average molecular weight equal to 1.5 million). HMW polymers allow for high drawability during spinning, and reduced solids content in the dope, both of which lead to smaller diameter fibers, and increased tensile strength and modulus properties. A strong relationship between filament diameter and tensile properties was observed.

Hybrid dry-jet gel spinning for production of high strength, small diameter polyacrylonitrile precursor fiber

245th National Meeting (2013)

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