What makes rubber stretchable


Rubber is a natural polymer and possesses elastic properties. It is also termed elastomer and has a variety of uses. It is manufactured from rubber latex which is a colloidal dispersion of rubber in water. This latex is obtained from the bark of the rubber tree and is found in India, Srilanka, Malaysia, Indonesia and South America.

It coagulates with the help of acetic acid to get natural rubber. Natural rubber may be considered as a linear polymer of isoprene (2-methyl-1,3-butadiene) and is also called as cis-1,4-polyisoprene.

The cis-polyisoprene molecule consists of various chains held together by weak vander waals interaction and it has a coiled structure. Thus it can be sterched like a spring and exhibits elastic properties.