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Evaluation of a metering, mixing, and dispensing system for mixing polysulfide adhesiveTests were performed to evaluate whether a metered mixing system can mix PR-1221 polysulfide adhesive as well as or better than batch-mixed adhesive; also, to evaluate the quality of meter-mixed PR-1860 and PS-875 polysulfide adhesives. These adhesives are candidate replacements for PR-1221 which will not be manufactured in the future. The following material properties were evaluated: peel strength, specific gravity and adhesive components of mixed adhesives, Shore A hardness, tensile adhesion strength, and flow rate. Finally, a visual test called the butterfly test was performed to observe for bubbles and unmixed adhesive. The results of these tests are reported and discussed.
Document ID
19900004338
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Evans, Kurt B. (Morton Thiokol Brigham City, UT, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1989
Subject Category
Nonmetallic Materials
Report/Patent Number
TWR-16417
NASA-CR-183749
NAS 1.26:183749
Accession Number
90N13654
Funding Number(s)
CONTRACT_GRANT: NAS8-30490
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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