ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Ageing and Stabilization of Polystyrene Plastics. III. Nature of the Carbonyl Functional Groups Formed during
the Photo-oxidation of Rubber Modified Polystyrene
J. Sedláček and L. Rosík
Kaučuk, n.е., Synthetic Rubber Research Institute,
Kralupy n. Vit.
Abstract: The formation of carbonyl compounds during the photo-oxidation of
rubber modified polystyrene has been studied by means of infrared spectroscopy.
A significant portion of the photo-oxidation products has been found
to be soluble in methanol. The technique of difference spectra in the combination
with the specific chemical reactions of carbonyl compounds with
ammonia, sodium hydroxide, potassium tetrahydroborate, thionyl chloride,
and hydrogen chloride was used to detect the nature of carbonyl groups in
solid polymer films and in low-molecular products extracted by methanol
from the oxidized samples. The presence of both esters and free acids in the
photo-oxidized rubber modified polystyrene has been qualitatively proved.
Aldehydes and ketones were further present but could not yet be distinguished
one from another
Full paper in Portable Document Format: 265a412.pdf
Chemical Papers 26 (5) 412–420 (1972)