Natural rubber isoprene has excellent dynamic properties.
Characteristics of natural rubber.
Technically speaking natural rubber is an elastomer or an elastic hydrocarbon polymer.
Raw rubber when heated to 130 c becomes soft and plastic.
However it does not do well with petroleum oils sunlight and ozone.
Natural rubber is an elastic substance obtained from the latex sap of trees especially those trees which belong to the genera hevea and ficus.
The plasticity can be varied within certain ranges by chemicals.
Highly resistant to ozone and weathering.
Physical properties of crude natural rubber.
Some natural rubber sources such as gutta percha are composed of trans 1 4 polyisoprene a structural isomer that has similar properties.
The physical properties of crude natural rubber are indicated below.
The performance characteristics of the natural rubber.
I e if it is heated and cooled it is degraded but not destroyed.
This latex rubber is mainly found in countries like brazil india indonesia malaysia and sri lanka.
Natural rubber is an elastomer and a thermoplastic.
2 natural rubber is a crystalline rubber crystals formed under external force stretching.
Most rubber in everyday use is vulcanized to a point where it shares properties of both.
Has good flexibility its elastic modulus of 3 6mpa.
Once the rubber is vulcanized it is a thermoset.