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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 endcapped 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
19980038056
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 18, 2013
Publication Date
September 23, 1997
Subject Category
Nonmetallic Materials
Report/Patent Number
Patent Application Number: US-Patent-Appl-SN-689760
Patent Number: NASA-Case-LAR-15526-1
Patent Number: US-Patent-5,670,256
Patent Application Number: US-Patent-Appl-SN-021206
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-Case-LAR-15526-1|US-Patent-5,670,256
Patent Application
US-Patent-Appl-SN-689760|US-Patent-Appl-SN-021206

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