Basically, the solutions found until this moment have to do mainly with the following three options: sulfur substitution by sulfur donor compounds, chemical treatment of the sulfur and/or the improvement of the affinity between sulfur and the polymer matrix.
In order to improve the sulfur-polymer miscibility, different products can be introduced to coat the sulfur and increase its affinity with the polymer matrix.
Plasma polymerization of powder sulfur could be an efficient way to modify sulfur surface polarity without the necessity to add more ingredients to the rubber formulation.
Thus, the aim of this present work is to study cold plasma polymerization on sulfur to modify the interaction of sulfur with the polymer matrix and consequently increase its solubility.
CBS (cyclobenzothiazole sulfenamide) and TMTD (tetramethylthiuramdisulfide) were provided by Flexsys: stearic acid, pyrrole and perfluorohexane by Aldrich; and micronized sulfur delivered by Jevsa S.