Thermodesorption states of fullerene C-60 in the polyimide-fullerene system

The data of thermodesorption mass spectrometry indicate that fullerene C-60 molecules are desorbed from a polyimide (PI) surface at temperatures below the PI decomposition onset temperature, while the desorption of C-60 from the bulk begins in the temperature region of the polymer decomposition. It is suggested that strong chemical bonds between C-60 and PI macromolecules are formed in the bulk in the stage of the polyamic acid preparation and ar e broken upon destruction of the polymer macromolecules. The character of C -60 thermodesorption from the PI surface depends on thickness of the surfac e film of fullerene C-60 . (C) 2000 MAIK "Nauka/Interperiodica".