Metallized polyimide films with high reflectivity and electroconductivity - Polyimides and Other High Temperature Polymers - page 403

4. CONCLUSION
It can be concluded that heterogeneous chemical modification of polyimide films
consisting of consequent steps of hydrolysis in alkali solutions, chelation by metal
cations in metal salts solutions, and the following reduction in aqueous solutions
of sodium borohydride allows to form a metal phase, strongly impregnated into
the near-surface layer of polyimide film. Silver forms crystal structure whereas
cobalt and nickel coatings are amorphous. In general, the metallized surface pro-
duced by this method represents itself in the background layer of grain structure
covered by metal particles of larger size. It is suggested that the grain structure is
due to the original morphology of the PI surface characterized by developed
mesoporous system.
The preparation of metallized polyimide films by in situ chemical modification
provides their high electroconductivity and reflectivity.
Acknowledgment
The authors are grateful to the French Embassy in Kazakhstan for support of this
research. This work was funded by NATO SfP 97 8013 grant.
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