Natural Rubber Is A Polymer Of Isoprene

The amount of cis 1 4 is typically in the range of 90 to 98.

Natural rubber is a polymer of isoprene. Natural rubber is an addition polymer that is obtained as a milky white fluid known as latex from a tropical rubber tree. Cis 1 4 polyisoprene is a hydrophobic and biodegradable polymer naturally occurring as latex in the laticiferous vessels or parenchymal single cells of rubber producing plants such as hevea brasiliensis. Therefore it is also known as elastomer. Natural rubber consist almost entirely of the cis 1 4 polymer whereas synthetic isoprene is a blend of cis 1 4 trans 1 4 and 3 4 the amount of cis 1 4 in natural rubber is typically in the range of 90 to 98.

Natural rubber also called india rubber latex amazonian rubber caucho or caoutchouc as initially produced consists of polymers of the organic compound isoprene with minor impurities of other organic compounds plus water. Isoprene or 2 methyl 1 3 butadiene is a common organic compound with the formula ch 2 c ch 3 ch ch 2. Thailand and indonesia are two of the leading rubber producers. Butyl rubber isobutylene isoprene rubber iir butyl rubber is a copolymer of isobutylene and isoprene that was first produced by william sparks and robert thomas at the standard oil company new jersey now exxon corporation in 1937.

Natural rubber is a polymer of cis isoprene. Natural and sythetic rubber differ in the microstructure. It is a linear 1 4 addition polymer of isoprene. Polyisoprene polymer of isoprene c 5 h 8 that is the primary chemical constituent of natural rubber of the naturally occurring resins balata and gutta percha and of the synthetic equivalents of these materials.

Natural rubber contains 97 wt cis 1 4 polyisoprene and about 3 wt proteins. Natural rubber consist almost entirely of the cis 1 4 polymer whereas synthetic isoprene is a blend of cis 1 4 trans 1 4 and 3 4 polymer. Natural rubber is from the monomer isoprene 2 methyl 1 3 butadiene which is a conjugated diene hydrocarbon as mentioned above. In its pure form it is a colorless volatile liquid.

It is produced by many plants and animals including humans and its polymers are the main component of natural rubber. Isoprene is an unsaturated hydrocarbon.