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The effect of elastomer chain length on properties of silicone-modified polyimide adhesivesA series of polyimides containing silicone elastomers was synthesized in order to study the effects of the elastomer chain length on polymer properties. The elastomer with repeat units varying from n=10 to 105 was chemically reacted into the backbone of an addition polyimide oligomer via reactive aromatic amine groups. Glass transition temperatures of the elastomer and polyimide phases were observed by torsional braid analysis. The elastomer-modified polyimides were tested as adhesives for bonding titanium in order to determine their potential for aerospace applications. Adhesive lap shear tests were performed before and after aging bonded specimens at elevated temperatures.
Document ID
19810022817
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
St.clair, A. K. (NASA Langley Research Center Hampton, VA, United States)
St.clair, T. L. (NASA Langley Research Center Hampton, VA, United States)
Ezzell, S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
August 1, 1981
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-TM-83172
Report Number: NASA-TM-83172
Meeting Information
Meeting: Southeastern Regional Meeting of the Am. Chem. Soc.
Location: Lexington, KY
Country: United States
Start Date: November 4, 1981
End Date: November 6, 1981
Accession Number
81N31360
Funding Number(s)
PROJECT: RTOP 505-33-33-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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