NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login

Press Enter or click the Search button to begin your search.

Back to Results
Processing for maximizing the level of crystallinity in linear aromatic polyimidesThe process of the present invention includes first treating a polyamide acid (such as LARC-TPI polyamide acid) in an amide-containing solvent (such as N-methyl pyrrolidone) with an aprotic organic base (such as triethylamine), followed by dehydrating with an organic dehydrating agent (such as acetic anhydride). The level of crystallinity in the linear aromatic polyimide so produced is maximized without any degradation in the molecular weight thereof.
Document ID
19920006825
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
St.clair, Terry L. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
October 29, 1991
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
Patent Application Number: US-PATENT-APPL-SN-516489
Patent Number: US-PATENT-5,061,783
Patent Number: NASA-CASE-LAR-14481-1
Patent Application Number: US-PATENT-APPL-SN-035430
Accession Number
92N16043
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-5,061,783|NASA-CASE-LAR-14481-1
Patent Application
US-PATENT-APPL-SN-516489|US-PATENT-APPL-SN-035430

Related Records

There are no records associated with this record.
No Preview Available