ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Photocross-linking process in butadiene-styrene rubber in the presence of anthracene Influence of dimethyldithiocarbamates of metals of variable valence

J. Hríviková, A. Blažková, and L. Lapčík

Department of Physical Chemistry, Faculty of Chemical Technology, Slovak Technical University, CS-81237 Bratislava

Abstract: The influence of trace amounts of dimethyldithiocarbamates of metals of variable valence (Ni(II), Co(II), Cu(II), and Fe(III)) and of time of irradiation with polychromatic ultraviolet light on cross-linking process in the system butadiene-styrene rubber—anthracene has been studied. As to the degree of cross-linking, conclusions were drawn from the amount of the insoluble polymer fraction after irradiation. The photocross-linking process in polymer was investigated on the basis of change in absorbance of some characteristic bands of atomic groups in infrared and ultraviolet spectral region. It has been found that all investigated complex compounds catalyze the photocross-linking process in the copolymer. The rate and efficiency of cross-linking is predominantly determined by the central metal atom and that is why the course of the structural changes in substrate due to irradiation is differently influenced by the investigated individual metal complex compounds with equal ligand.

Full paper in Portable Document Format: 432a191.pdf

Chemical Papers 43 (2) 191–200 (1989)