Metallized polyimide films with high reflectivity and electroconductivity - Polyimides and Other High Temperature Polymers - page 391

80 nm [21], and the thickness of the modified layer becomes 1-2 µm depending
on the temperature of hydrolysis [22, 23]. Evaluation of surface properties of both
sides of Kapton type polyimide reference film [24] by contact angle measure-
ments and reflection spectroscopy has shown that the degree of imidization of
polyimide films for glass side surface was not as high as that for the air side sur-
face at the same temperature treatment.
In order to exclude the effect of surface morphology and polyimide : poly(amic
acid) ratio of different films sides during hydrolysis process, we have taken more
hydrolytically stable PAA2 film which can be considered as a model compound
of poly(amic acid) (PMDA/ODA). Insolubility of PAA2 polyamate salts allows to
achieve practically 100% conversion of PAA/K + into PAA2/M n+ and to investi-
gate further steps of metallization.
Figure 1. IR spectra of: 1 - PAA2 film; 2 - hydrolysed PAA2 film; 3 - PAA2 film chelated by
Cu 2+ ; 4 - PAA2 film chelated by Ag + .