It is well known that by using NaOH solution it is possible to completely reverse the reaction which - through Poly-Amic Acid (PAA) results in formation of Fully Imidized Polyimide - down to initial reagents , i.e. diamine and dianhydride.
The question is how to CONTROLLABLY revert this reaction - back to formation of PAA - SO THAT the destruction (partial destruction) of Polyimide to proceed uniformely - i.e. the thus obtained PAA to have the same molecular weight as before destruction?
In other words: just "to open" the Imide cycles.
To obtain a sticky layer on a polymerized polymer film by dissolving the polymer in a volatile solvent and pouring it over a flat glass layer with evaporating the solvent .
Dear Prof. firyal Mohammed Ali Alsalami :
Thank you for your advice, but the approach you've proposed - is a general approach. Regretfully in case of Aromatic Polyimides it does not work.
Best Regards, Leonid
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