To obtain natural rubber first of all latex of rubber plant is obtained. The latex contains, about 25 – 40% of rubber hydrocarbons dispersed in water along with stabilizer proteins and some fatty acids are mixed due to which rubber coagulates and precipitated out. It is separated by filtration. This rubber is known as crepe rubber.
Structure and composition:
Natural rubber may be considered as a linear polymer of isoprene (2 – methyl – 1, 3 butadiene) and also called as cis – 1,4 polyisoprene.
