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Siloxane containing polyimides with improved processabilitySiloxane containing polyimides were prepared in an effort to improve processability of linear aromatic polyimides and toughness of addition curing imide oligomers. Linear aromatic polyimides were endcapped with varying proportions of a silane; a diaminosiloxane was copolymerized with an aromatic diamine; polyimide oligomers were endcapped with reactive groups; and acetylene terminated siloxane-containing oligomers were blended with linear siloxane-containing polyimides. The resins were used to prepare moldings, titanium to titanium adhesive bonds, and graphite reinforced composites. In each case, physical properties and other characteristics were compared to those of chemically similar polyimides with no siloxane incorporation. The resins, in most cases, performed better at room temperature than the corresponding polyimide. At elevated temperatures, for high siloxane content, the performance deteriorated.
Document ID
19930068769
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Maudgal, Shubha
(NASA Langley Research Center Hampton, VA, United States)
St. Clair, T. L.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1985
Subject Category
Nonmetallic Materials
Accession Number
93A52766
Distribution Limits
Public
Copyright
Other

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