Accession Number:

ADA350251

Title:

Effect of Processing Variables on the Structure and Properties of Polymer Interphases.

Descriptive Note:

Final rept. 1 Dec 92-30 Nov 96,

Corporate Author:

CINCINNATI UNIV OH DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1998-07-15

Pagination or Media Count:

51.0

Abstract:

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.

Subject Categories:

  • Adhesives, Seals and Binders
  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE