Natural and Synthetic Rubbers

Write the chemical equation for the preparation of cis$-1,4-$polybutadiene.

Which of the following is a synthetic rubber.

Write the partial structure of Cis$-1,4-$Polybutadiene. 

Name the monomer of Cis$-1,4-$Polybutadiene. 

Which of the following structures represent repeating units of neoprene polymer?

Which of the following is the monomer of natural rubber?

The above image is the structure of monomeric unit of natural rubber($2$-methyl-$1,3$-butadiene), whose common name is _____.(Isoprene/chloroprene)

The monomer units of polymer Buna-N.

Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of nitrogen.

Copolymerization of $1,3$ $-\mathrm{butadiene}$ and acrylonitrile gives

Vulcanisation improves elasticity of rubber. What is meant by the term vulcanisation?

Give the reaction involved in the formation of Buna-S.

The process involving heating of rubber with sulphur is called

Discuss the main purpose of vulcanisation of rubber.

Explain the difference between buna-$\mathrm{N}$ and buna-$\mathrm{S}$.

Treatment of rubber with sulphur is called ______.

The process of vulcanization makes rubber ______.

Draw the structure of isoprene.

Rubber is hardened for making tyres by

Describe the vulcanization process in order to increase the strength of the rubber.