Abstract
We successfully obtained well-ordered spherical nanostructures in spin-casted films prepared by combining wholly aromatic condensation polymers and olefin type BCPs. No other structures were obtained despite increasing the ratio of PAA to BCP. These results indicate that the micelle structures formed in solution were deposited onto the substrates to form the spherical nanostructures selectively. By increasing the concentrations of the solution used and adding methanesulfonic acid to catalyze the cross-linking reaction of the resol, it is possible to decrease the areal density of defects, such as terracing, and the surface roughness on the thin film. However, as the spherical structure had partially collapsed during imidization on the thin film as the temperature increased, further studies are required to obtain the optimal experimental conditions to obtain a stiff and well-ordered porous polyimide thin film.
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