The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2001
Filed:
Jun. 03, 1998
Chyi-Shan Wang, Beavercreek, OH (US);
Jar-Wha Lee, Hilliard, OH (US);
The University of Dayton, Dayton, OH (US);
Abstract
A method for processing thermally intractable rigid-chain polymers into shaped structural articles is provided. The method includes dissolving a rigid-chain polymer in sulfuric acid at a concentration and temperature sufficient to form a nematic liquid crystalline solution which is then formed into a shaped article and cooled to a solid. The solution undergoes a phase transformation upon cooling from a liquid crystalline phase to a solid phase containing crystal solvates. The method allows rigid-chain polymers to be formed into fibers, bulk structural components, fiber reinforced composites and other structural materials without undergoing significant shrinkage or deformation.