E.i. Dupont De Nemours and Company

Magellan Systems International LLC

Qinghong Fu Adkins

David J Rodini

Steven R Allen

Doetze Jakob Sikkema

Christopher William Newton

Michael Schelhaas

Georg Martin

Ralf Demuth

Disclosed are processes for preparing polyareneazole polymers characterized as providing polymer solutions having an inherent viscosity of at least about 22 dl/g at 30&#xb0; C. at a polymer concentration of 0.05 g/dl in methane sulfonic acid. Polyareneazoles, filaments and yarns are also disclosed.

High inherent viscosity polymers and fibers therefrom

Disclosed are thermal processes for increasing polyareneazole inherent viscosities.

Thermal processes for increasing polyareneazole inherent viscosities

Disclosed are processes for preparing polyareneazole polymers including contacting a molar excess of a free base in water with a terephthalic acid salt to form an aqueous mixture, adjusting the pH to precipitate a monomer complex, contacting the monomer complex with metal powder, and polymerizing the monomer complex. Polyareneazoles, filaments and yarns are also disclosed.

Processes for increasing polymer inherent viscosity

Disclosed are processes for preparing polyareneazole polymers that include contacting, in polyphosphoric acid, azole-forming monomers and metal powder, the metal powder added in an amount of from about 0.05 to about 0.9 weight percent, based on the total weight of the azole-forming monomers, and reacting the azole-forming monomers to form the polyareneazole polymers. Polyareneazoles, filaments and yarns are also disclosed.

Growing community of inventors

Collinsville, VA, United States of America

Qinghong Fu Adkins