NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The application of thermodynamic and spectroscopic techniques to adhesion in the polyimide/Ti 6-4 and polyphenylquinoxaline/Ti 6-4 systemsThe results of calorimetric measurements of Ti adherend surfaces are presented. The measurements were carried out after several chemical pretreatments and after fracture of several lap shear samples aged at high temperature. The exact composition of the Ti samples was Ti(6 percent Al-4 percent V). The adhesives used were polyimides and polyphenylquinoxalines (PPQ). Each chemical pretreatment was accompanied by a unique spectroscopic feature which was characterized by XPS, SEM, and specular reflectance infrared spectroscopy. The energetics of the interaction between primer solutions and the Ti adherend were evaluated by microcalorimetry. Changes in the structure of the surface oxide layer upon heating of the adherend were deduced from immersion temperatures of the PI and PPQ solutions. The XPS and SEM data are given is a table.
Document ID
19860031499
Document Type
Conference Proceedings
Authors
Dias, S. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Wightman, J. P. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
NONMETALLIC MATERIALS
Funding Number(s)
CONTRACT_GRANT: NAG1-248
CONTRACT_GRANT: NAG1-127
Distribution Limits
Public
Copyright
Other