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Polyimide FibersA polyimide fiber having textile physical property characteristics and the process of melt extruding same from a polyimide powder. Polyimide powder formed as the reaction product of the monomers 3.4'-ODA and ODPA, and end- capped with phthalic anhydride to control the molecular weight thereof, is melt extruded in the temperature range of 340 C. to 360 C. and at heights of 100.5 inches. 209 inches and 364.5 inches. The fibers obtained have a diameter in the range of 0.0068 inch to 0.0147 inch; a mean tensile strength in the range of 15.6 to 23.1 ksi; a mean modulus of 406 to 465 ksi, and a mean elongation in the range of 14 to 103%.
Document ID
19990008609
Acquisition Source
Langley Research Center
Document Type
Other - Patent
Authors
St.Clair, Terry L. (NASA Langley Research Center Hampton, VA United States)
Fay, Catharine C. (NASA Langley Research Center Hampton, VA United States)
Working, Dennis C. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
November 24, 1998
Subject Category
Nonmetallic Materials
Report/Patent Number
Patent Application Number: US-Patent-Appl-SN-858201
Patent Number: US-Patent-5,840,828
Patent Number: NASA-Case-LAR-15556-2
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-5,840,828|NASA-Case-LAR-15556-2
Patent Application
US-Patent-Appl-SN-858201

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