Influences of Accelerators on the Properties of Nitrile Butadiene Rubber and Attenuated Total Reflectance (ATR)-Fourier Transform Infrared (FTIR) Investigation.

Sabrenal H. Elhamouly, Magdi A. Masoud, Ahmed M. Kandil


The effect of incorporation of different types of accelerators i.e. TMTD, TMTM, DOTG and NPV/C on properties of NBR rubber was investigated. Without any organic accelerator it required long time to cure; tensile properties showed the least value but elasticity was the highest one and ageing properties were poor. Thiuram accelerators gave very fast cure; good tensile properties; high crosslinking density reflected on its resistance to organic solvents and gave the best ageing characteristics. Di -o- tolyl guanidine and vulcacit NPV/C thiourea gave slow onset of cure; long scorch time; high tensile; resilience properties, DOTG gave better ageing properties than NPV/C accelerator. The effect of accelerator type on compounds viscosity corresponded well with the melting point of the accelerators. NBR had high resistance to oil, in toluene and benzene TMTD and TMTM gave the best resistance. Elucidation of the structure of vulcanizates was determined by ATR- FTIR technique

Key words: acrylo nitrile butadiene rubber, accelerators, mechanical properties, ageing, ATR- FTIR.

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