OPTIMISATION 8 EVALUATION OF N-(1,3-DIMETHYLBUTYL)-N´-PHENYL-1,4-PHENYLENEDIAMINE (6-PPD)-AN ANTIDEGRADANT IN TREAD COMPOUND AND CHARACTERISATION OF RUBBER VALCANISATES FOR ITS PERFORMANCE

Abstract

Natural and synthetic rubbers are widely used for various applications, because of their unusual properties such as high elasticity, extensibility, resiliency, durability, high abrasion resistance, high strength. The automobile industry is a key consumer, for both tyre and non-tyre sectors and has emerged as the single-largest consumer of vulcanized rubber, in the form of auto tyres, tubes, and other parts and accessories. In some applications different additives are also used along with polymers. Used polymers are generally disposed to environments or in some case it is being recycled. Therefore, the optimization of additives is required for the performance of the characteristic properties of the rubber and to control the release of various additives in the environment. N-(1,3-Dimethylbutyl)-N´-phenyl-1,4-phenylenediamine (6PPD) is widely used as antidegradent due to its property of fast migration to the surface of the polymer. The present work is focused on studying the effect of concentration of N-(1,3-Dimethylbutyl)-N´-phenyl-1,4-phenylenediamine on the physical, mechanical properties like tensile strength, fatigue to failure and ozone resistant capacity. Concentration of 6PPD was varied from 0 to 2.5 phr to study the optimization of rubber characteristics.