NDLI: An improved processible acetylene-terminated polyimide for composites

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An improved processible acetylene-terminated polyimide for composites

Content Provider	NASA Technical Reports Server (NTRS)
Author	Landis, A. L. Naselow, A. B.
Copyright Year	1985
Description	The newest member of a family of thermosetting acetylene-substituted polyimide oligomers is HR600P. This oligomer is the isoimide version of the oligomer known as HR600P and Thermid 600. Although both types of material yield the same heat resistant end products after cure, HR600P has much superior processing characteristics. This attributed to its lower melting temperature (160 + or - 10 C, 320 + or - 20 F) in contrast to 202 C (396 F) for Thermid MC-600, its longer gel time at its processing temperature (16 to 30 minutes bvs 3 minutes), and its excellent solubility in low boiling solvents such as tetrahydrofuran, glymes, or 4:1 methyl ethyl ketone/toluene mixtures. These advantages provide more acceptable coating and impregnation procedures, allow for more complete removal at lower temperatures, provide a longer pot life or working time, and allow composite structure fabrication in conventional autoclaves used for epoxy composite curing. The excellent processing characteristics of HR600P allow its use in large area laminated structures, structural composites, and molding compositions.
File Size	429278
Page Count	12
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19860001795
Archival Resource Key	ark:/13960/t8tb60g9s
Language	English
Publisher Date	1985-09-01
Access Restriction	Open
Subject Keyword	Composite Materials Structural Members Thermal Resistance Aircraft Construction Materials Injection Molding Thermosetting Resins Laminates Resin Matrix Composites Polyimide Resins Acetylene 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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