Rubber Compounds Properties

Natural rubber is characteristically widely variable in viscosity from lot to lot so that several lots are usually blended and masticated to control viscosity and physical properties of the compound.

Rubber compounds properties.

Different carbon black structures were used and characterised with respect to their rheological and physical properties it was found that the nr compound containing high structure black i e. Generally the many different grades of neoprene have a direct correlation to the actual percentage of neoprene in the compounds. It is also able to remain flexible over a wide temperature range. The rubber properties chart below provides general information for various common elastomeric compounds and very general features of the most common elastomers.

Sbr compounds have properties similar to those of natural rubber. However the knowledge of rubber s physical properties and their measurement is critical for compound selection. As noted above rubber compounds exhibit a wide range of properties resulting from differences in each material s formulation. Polymer 100 phr filler 30 60 phr.

Sbr features excellent resistance to brake fluids and good water resistance. Sometimes there is a misconception that a rubber compound is one ingredient and is the same for every different polymer type. This could not be further from the truth. A rubber compound could be a combination of 3 to 15 different ingredients of thousands of different compositions and vendors.

Rubber compound formulations have generally evolved over many years with new additives and fillers combined with old. This study aims to investigate the effect of carbon black structures on the mechanical properties of industrial tyre rubber compounds containing natural rubber nr and styrene butadiene rubber sbr. The rubber materials selected by designers and technical buyers should meet all their application requirements. Rubber rubber additives.

Basic elastomers are mixed with a variety of chemicals and ingredients to obtain desired physical properties. The breakdown of natural rubber promotes viscoelasticity by extending or disentangling the polymer chains or by severing the chains. By convention mix formulations begin with the amount of the designated elastomer for instance natural rubber nr butadiene rubber br or styrene butadiene rubber sbr given as 100 parts by weight. A typical rubber formation based on parts per hundred is.

Sbrs primary custom molded application is the use in hydraulic brakes system seals and diaphragms with the major of the industry usage coming from the tire industry. Rubber compounding is a broad field. A number of ingredients are added to both natural and synthetic rubber in order to obtain certain desirable properties. Neoprene rubber is a general purpose compound that offers oil resistance and has good chemical stability.