Characteristics Of Natural Rubber

Has good flexibility its elastic modulus of 3 6mpa.

Characteristics of natural rubber.

At low temperature rubber becomes stiff and when it frozen it attains fibrous structure. Highly resistant to ozone and weathering. Most rubber in everyday use is vulcanized to a point where it shares properties of both. Natural rubber is an elastic substance obtained from the latex sap of trees especially those trees which belong to the genera hevea and ficus.

Natural rubber is made up of solid particles suspended in a milky white liquid called latex that drips from the bark of certain tropical and subtropical trees. The plasticity can be varied within certain ranges by chemicals. 2 natural rubber is a crystalline rubber crystals formed under external force stretching. Some natural rubber sources such as gutta percha are composed of trans 1 4 polyisoprene a structural isomer that has similar properties.

Natural rubber isoprene has excellent dynamic properties. Raw rubber when heated to 130 c becomes soft and plastic. Physical properties of crude natural rubber. Polyacrylate is used in applications such as transmissions or anything where there is petroleum oils and high temperature.

Once the rubber is vulcanized it is a thermoset. Natural rubber is an elastomer and a thermoplastic. Technically speaking natural rubber is an elastomer or an elastic hydrocarbon polymer. However it does not do well with petroleum oils sunlight and ozone.

I e if it is heated and cooled it is degraded but not destroyed.