DETERMINATION OF RUBBER-CORD CONNECTION ON THE BASIS OF LATEX SYNTHESIZED ON THE BASIS OF ETHYLENE-PROPYLENE RUBBER

Abstract

The purpose of this work: to obtain latex on the basis of ethylene-propylene rubber and to determine the rubber-cord connection or rather its adhesion on the basis of it. For the first time, EPR+PMMA latex was obtained by modifying it with methacrylic acid in order to obtain latex based on EPR. As a result of the experiment, the kinetics of the modification process was studied. It has been shown that when modifying EPR with MAA, the amount of acid should be 5 mass parts, and the co-polymerization process should be carried out for 5 hours and at a temperature of 90o. An adhesive bond with high physic-mechanical properties can be obtained by using a specially formulated absorbent compound to enhance the rubber-cord bond. It was determined that the adhesion relationship also depends on the thickness of the absorbent composition. As the density of the impregnating composition increases, the wetting of the textile fibers with the composition decreases and the contact strength with the rubber decreases significantly. It was determined that the viscosity of the absorbent composition should be 5-8%. However, the density of EPR+PMMA co-polymer in the used latex should not be lower than 10%. Only in this case, the cord threads can be thoroughly soaked in the absorbent composition.