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  • 1
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    Polyimide Fibers (1997)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A 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%.
    Keywords: Nonmetallic Materials
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Modified LaRC(TM)-IA Polyimides (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Modified versions of thermoplastic polyimide LaRC(TM)-IA incorporate various amounts of additional, rigid moieties into backbones of LaRC(TM)-IA molecules. Modified versions more resistant to solvents and exhibit higher glass-transition temperatures, yet retain melt-flow processability of unmodified LaRC(TM)-IA.
    Keywords: MATERIALS
    Type: LAR-15083 , NASA Tech Briefs (ISSN 0145-319X); 18; 9; P. 96
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Recent Advances in Thermoplastic Puncture-Healing Polymers (2010)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The motivation for this work is to develop self-healing polymeric materials to enable damage tolerant systems, and to tailor puncture healing for use temperatures and applications. This will be a benefit in environments and conditions where access for manual repair is limited or impossible, or where damage may not be detected.
    Keywords: Nonmetallic Materials
    Type: NF1676L-10583 , LAR-17706,1 , AIAA Infotech at Aerospace 2010; Apr 20, 2010 - Apr 22, 2010; Atlanta, GA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Polyimide Fibers (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: A 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%.
    Keywords: Nonmetallic Materials
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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