Effect of Processing Variables on the Structure and Properties of Polymer Interphases.
Final rept. 1 Dec 92-30 Nov 96,
CINCINNATI UNIV OH DEPT OF MATERIALS SCIENCE AND ENGINEERING
Pagination or Media Count:
The effect of processing variables on the molecular structure and properties of interphases formed between polyimides and metal substrates was determined. Polyimide films were formed on aluminum substrates by spin-coating of polyamic acid followed by thermal imidization and by vapor-codeposition of the monomers followed by thermal imidization. Spin-coating of polyamic acid and thermal imidization were also used to deposit polyimide films on gold substrates. Films were formed on silver substrates by Langmuir-Blodgett deposition of alkylamine salts of polyamic acid followed by chemical imidization. 4-mercaptophenylphthalimide, a model polyimide, was adsorbed onto gold substrates by adsorption from solution. The films were characterized as appropriate by X-ray photoelectron spectroscopy XPS, reflection-absorption infrared spectroscopy RAIR, and surface-enhanced Raman scattering SERS. The fracture energy required-to delaminate polyimide films from aluminum and gold substrates was determined using the circular blister test. Finite element analysis was used to determine the effects of plastic deformation on a global scale on the fracture energy.
- Adhesives, Seals and Binders
- Polymer Chemistry