Properties And Applications Of Nitrile Rubber And Polyurethane Rubbers

These two rubber types are very important in polymer chemistry. They are used as elastomer polymers in some engineering applications. In here, we will explain the properties and applications of nitrile rubbers and polyurethane rubbers.

What Are The Properties And Applications Of Nitrile Rubbers?

Nitrile rubber glove.

The nitrile rubber is a copolymer of two compunds. These compounds are butadiene and acrylonitrile. They can have compositions around 50% respectively in nitrile rubbers. Because of that chemical composition, nitrile rubbers are also called as ‘butadiene-acrylonitrile rubbers’ in market. Nitrile rubbers are vulcanizable. Because of this property, they can have very good resistance to abrasion, oil and water. Because of these properties, nitrile rubbers are generally used for gasoline pump parts and hose sealings. Footwear is also very important example of application.

  • Properties Of Nitrile Rubber: It has market symbol of NBR. The chemical representation of copolymer compounds of nitrile rubbers; C4H6 and C3H3N respectively for butadiene and acrylonitrile. Elongation at failure according to original shape is around 500%. The temperature range to use nitrile rubbers is between -50C and 120C. Tensile strength of nitrile rubbers is around 30 MPa and elasticity modulus is around 10 MPa.

What Are The Properties And Applications Of Polyurethanes?

Polyurethane bushings(Src:Trinityautorubber)

As you know that elastomer polyurethanes has lesser cross-linked structure compared with thermosetting polyurethanes. With this small number of cross-linking, they show elastomer behavior. Elastomer polyurethanes are generally produced in foam form, and thet are used in cushion ans automobile seats. Unfoamed polyurethanes are used in shoe soles and car bumpers. Polyurethanes that has no cross-linked structures are thermoplastic. Thermoplastic polyurethanes can be injection molded.

  • Properties Of Thermoset Polyurethanes: The symbol of commercial thermoset polyurethanes is PUR. Elongation at failure according to original shape is around 700%. The temperature range to use thermosetting polyurethane is between -50C and 100C. Tensile strength of thermosetting polyurethane is around 60 MPa and elasticity modulus is around 10 MPa.

These are the general characteristics of thermosetting polyurethanes and nitrile rubbers that are avaliable in market. Do not forget to leave your comments and questions about thermosetting polyurethanes and nitrile rubbers below.

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