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

Influence of metal stearates on thermal-stability of poly(vinyl chloride) .1. Calcium stearate

J. Oremusová, P. Šimon, L. Valko, and P. Kovařík

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

Abstract: The mechanism of stabilizing effect of calcium stearate in thermal dehy­drochlorination of polyvinyl chloride) was studied. Nonstabilized as well as stabilized samples of polyvinyl chloride) thermally stressed were analyzed by infrared spectroscopy and by determining viscosimetrically their relative molecular mass. A reaction scheme of the processes proceeding in the course of dehydrochlorination was suggested. By comparing the experimental and theoretical kinetic curves, the rate constants of individual kinetic steps of the reaction scheme were determined.

Full paper in Portable Document Format: 436a721.pdf

Chemical Papers 43 (6) 721–731 (1989)