Nitrile Rubber (NBR) and Styrene Butadiene (SBR) are commonly considered as workhorse of the industrial and automotive rubber product industries. Crude NBR is used in fuel and oil handling hose, seals and grommets, and water handling applications. With a temperature range of _40 °C to +125 °C, NBR materials can withstand all but the most severe automotive applications. Crude SBR is superior to natural rubber and is extensively and preferentially used in belting, hose, molded goods, unvulcanized sheet, gum and flooring. With the aim of commenting on the thermal property of DSC and TGA, plots were recorded for crude NBR and crude SBR subjected to differential scanning calorimetric study and Thermogravimetric Analysis (TGA) respectively. From the analysis of DSC, the Enthalpy (H) of crude NBR was found to be 1.441 J/g at 100.55 °C similarly, enthalpy for crude SBR was found to be 1.011 J/g at 89.97 °C. From the TGA study, the thermal degradation temperature of crude NBR and SBR samples was obtained around 460 °C .

Rubber materials can be termed the wheels of the chariot of progress. They touch every sphere of human activity and this is more so in the transportation sector. They contribute to economic progress by the growth of per capita income. Premamoy (2003) gave an interesting account of the technology of rubber material. Rubber materials have immense applications in diverse fields and the dependence of several industries on these materials demands a thorough understanding of the structure, composition and property relationship which facilitate the design and manufacture of products in accordance with the need in an economic way, i.e., goods with low cost and high performance. Natural rubber is a high molecular weight polymer of isoprene. It can be obtained from nearly five hundred different species of plants. The tree Hevea brasiliensis is the outstanding source of natural rubber and gives Hevea rubber. Latex is an aqueous dispersion of rubber containing 25-40% rubber hydrocarbon, stabilized by a small amount of protein material and fatty acids (Fred and Billmeyer, 1984). Butadiene is derived exclusively from petroleum. Crude Nitrile-butadiene rubber (NBR) and crude Styrene-butadiene rubber (SBR) are derived from butadiene.

Crude NBRs are the first commercial nitrile rubbers, made in Germany. They are well known for their oil resistance but not suitable for tires. Their heat resistance is good (Arun et al., 2001). Crude NBR is found in a wide variety of application areas requiring oil, fuel, and chemical resistance. In the automotive area, crude NBR is used in fuel and oil handling hose, seals and grommets, and water handling applications. On the industrial side, crude NBR finds uses in roll covers, hydraulic hoses, conveyor belting, graphic arts, oil field packers, and seals for all kinds of plumbing and appliance applications. The crude SBR is obtained by anionic solution copolymerization of butadiene and styrene with alkyl lithium catalysts. Crude SBR is superior to natural rubber in terms of ozone resistance but when cracks or cuts start in SBR, they grow much more rapidly. They are extensively and preferentially used in belting, hose, molded goods, unvulcanized sheet, gum and flooring. Rubber shoe soles are made of crude SBR. More than 60% of the rubber produced is consumed by tyre industries. These include cycle and rickshaw tyres, scooter and motor cycle tyres, car, bus, truck and tractor tyres, airplane tyres and tubes for all pneumatic tyres.

Physics Journal, Thermogravimetric Analysis, Crude NBR and SBR, Styrene Butadiene, Nitrile Rubber, Automotive Rubber Product Industries, Transportation Sectors, Water Handling Applications, Differential Scanning Calorimetry, Thermal Degradation Temperature, Conventional Analysis, Electronic Goods.