NDLI: Polyimide matrix composites: polyimidesulfone/larc-tpi (1:1) blend

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Polyimide matrix composites: polyimidesulfone/larc-tpi (1:1) blend

Content Provider	NASA Technical Reports Server (NTRS)
Author	St clair, Terry L. Johnston, Norman J. Baucom, Robert M. Towell, Timothy W.
Copyright Year	1989
Description	Polyimide matrix composites were fabricated from unidirectional unsized AS-4 carbon fiber and a doped 1:1 blend of two polyimides: benzophenone dianhydride-3,3'-diamino diphenylsulfone (PISO2) and benzophenone dianhydride-3,3'-diamino benzophenone (LARC-TPI). To enhance melt flow properties, the molecular weight of the PISO2 was controlled by end-capping with phthalic anhydride and addition of 5 percent by weight p-phenylene diamine-phthalic anhydride bisamic acid dopant. Prepreg was drum-wound using a diglyme slurry comprised of the soluble polyamideacid of PISO2, the soluble bisamideacid of the dopant, and the insoluble imidized LARC-TPI powder. Melt flow studies with a rotary rheometer and parallel plate plastometer on neat resin and prepreg helped develop an optimum cure cycle. Composite mechanical properties at room and elevated temperatures, dry and moisture-saturated, were evaluated, including short beam shear strength and flexure, tensile, shear, and compression properties. Two 18 in. x 24 in. skin-stringer panels were fabricated, one of which was tested in compression to failure.
File Size	3861011
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890015923
Archival Resource Key	ark:/13960/t23c0z629
Language	English
Publisher Date	1989-03-01
Access Restriction	Open
Subject Keyword	Composite Materials Additives Plastic Flow Rheology Compression Tests Shear Strength Compressive Strength Polyimide Resins Creep Tests Tensile Strength Fabrication Temperature Effects Curing Carbon Fiber Reinforced Plastics Slurries Resin Matrix Composites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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