Thin foil samples of the title polymer preheated in vacuo up to different temperatures with the highest one reaching 1200 K were analysed by XPS. On heat treatment the surface content of oxygen decreased and that of carbon increased monotonously, while that of nitrogen passed over a local maximum at c. 800 K. Ether-type oxygens proved to be more heat resistant than carbonyl type ones. From the change of the N 1s peak the probable mechanism of decomposition up to c. 800 K was inferred to be a decarboxylation to give -CH equals N-type structures. At higher temperatures decarbonylation of the imide groups appeared to become predominant, resulting in the formation of amide functionalities. The development of a conductive (polyaromatic) structure was deduced from the gradual decrease in the charge shift with the increase of the temperature of pretreatment.
|Number of pages||6|
|Journal||Surface and Interface Analysis|
|Publication status||Published - Dec 1986|
ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry