Abstract
The method of thin-layer chromatography under critical conditions was used for the analysis of the functional and structural inhomogeneities of polymethylmethacrylate and poly-tert-butylmethacrylate side chains cleaved from molecular polyimide brushes. Acetic acid–containing mobile phases are suggested, allowing a gradual transition from adsorption to exclusion chromatographic regime to be observed upon variation of the mobile phase composition for both cleaved side chains and “reference” polymethylmethacrylate and poly-tert-butylmethacrylate linear polymers. The presence of a few kinds of cleaved side chains having one terminal carboxylic group and differing in the nature of the other terminal group is revealed.
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