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研究了聚（N，N-二甲基苯胺）在硫酸和三氯醋酸水溶液中的质子化行为，对其吸收光谱和核磁共振谱的研究发现，聚（N，N-二甲基苯胺）在不同酸度下存在两种质子化状态：在强酸体系中质子加在侧基氮原子上，在中等酸性体系中质子加在主链的苯环上．
The protonation behavior of poly (N, N-dimethylaniline) in aqueous solution of sulfuric acid and trichloroacetic acid was studied. The absorption spectra and NMR spectra of poly (N, N-dimethylaniline) There are two kinds of protonation states under different acidity: the proton is added to the pendant nitrogen atom in the strong acid system, and the proton is added to the benzene ring of the main chain in the moderate acid system.