Synthesis and Investigation of Dithiocarbamate Derivatives as Polyfunctional Ingredients in Rubber Compounds

The synthesis of dithiocarbamate derivatives and their potential application as accelerators and anti-degradants in rubber compounds have been investigated. The physico-mechanical properties of vulcanizates based on IR SKI-3 and their resistance to thermo-oxidative aging have been determined. The influence of the obtained compounds on the dynamic properties of the composition has been established. Partial replacement of captax with synthesized 2-fluorophenyl dithiocarbamate triethylamine allows maintaining the strength at the level of the control sample. At the same time, the rubbers exhibit increased resistance to dynamic loads and comparable values of the tangent of mechanical loss angle at high deformation levels compared to vulcanizates containing only captax. This effect is achieved by increasing the polarity of the radical and improving the mobility of the chains of rubber macromolecules, which is confirmed by the calculation of the time spectrum of relaxation for mechanical vibrations under shear deformations. Also, the synthesized product has a positive effect on the resistance of rubber to thermal-oxidative aging.