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Rubbers are very important materials in polymer market. They have very important place in engineering applications. In here, we discuss about the two types of synthetic rubbers; ethylene-propylene and isoprene rubbers. You can find very useful informations about these rubbers below.
Ethylene-propylene rubber is an actually terpolymer. The third constituent monomer in this terpolymer is diene, which has a very small propotion compared with ethylene and propylene. This terpolymer rubber called as EPDM also in rubber market. General applications of ethylene-propylene rubbers are; cable insulation and automative parts.
Constituents ethylene, propylene has chemical representations of C2H4, C3H6 respectively. Diene monomer is generally added to obtain cross-linked structure in this rubber. The service temperature limits of ethylene-propylene is from -50C to 150C. Ethylene-propylene rubber has density of 0.86 g/cm^3. And tensile strength of ethylene-propylene rubber is 15MPa. The maximum elongation of ethylene-propylene rubber according to its original shape is around 300%.
This synthetic rubber is synthesized as the equivalent of natural rubber. It has same characteristics with natural rubber. Synthetic polyisoprene is also softer that natural rubber and much more easlity molded. Some of applications that isoprene rubber is used in; caulking, footwears, conveyors etc.
The rubber that obtained from isoprene is polyisoprene. Polyisoprene has chemical representation of (C5H8)n. ‘n’ means the number of copolymers in the polymer. The symbol of isoprene rubber is ‘IR’ in market that ou can find it with this symbol. The temperature avaliability of isoprene rubber is from -50C to 80C. Modulus of elasticity of polyisoprene is around 17 MPa at elongation of 300% of its original shape. Tensile strength is around 25 MPa. Failure elongation of polyisoprene is 500%.
These are the general charactristics of isoprene and ethylene-propylene rubbers. Do not forget to leave your comments and questions about isoprene and ethylene-propylene rubbers and their applications and properties below. Your precious feedbacks are very important for us.