RAMAN AND ESR SPECTROSCOPIC STUDIES OF ACCELERATOR SYSTEMS - 2. THERMAL DEGRADATION VULCANIZING SYSTEMS AND ITS SIGNIFICANCE TO VULCANIZATION MECHANISMS.

Abstract

An experimental investigation is described in which Raman and ESR spectroscopy techniques have been employed to study the thermal decomposition of several important vulcanizing systems based on derivatives of dimethyldithiocarbamic acid (DMDC). Experimental results are presented and discussed in terms of the mechanism of accelerated sulfur vulcanization. Chemical structures of several intermediates are proposed. It is shown that the combination of these two spectroscopic techniques has proved to be a very powerful method for detecting intermediate compounds that are important for the elucidation of the mechanism of accelerated sulfur vulcanization.