Natural and Synthetic Rubbers

IMPORTANT

Natural and Synthetic Rubbers: Overview

This Topic covers sub-topics such as Vulcanisation of Rubber, Neoprene, Isoprene, Natural Rubber, Synthetic Rubbers, Buna-S, Buna-N, Butadiene-Styrene Rubber, Properties of Rubber, Preparation of Synthetic Rubbers and, Properties of Synthetic Rubbers

Important Questions on Natural and Synthetic Rubbers

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How will you prepare butadiene-styrene rubber?

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Butadiene-styrene rubber is prepared by the copolymerisation of butadiene and styrene.

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Write some uses of butadiene-styrene rubber

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Compare between synthetic and natural rubbers.

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Give any two properties of synthetic fibres.

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_____ are usually more water, stain, heat and chemical resistant.

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Natural rubber is any vulcanisable rubber like polymer, which is capable of getting stretched to twice its length.

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Give some uses of Buna-N.

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Give some uses of Neoprene.

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_____ is resistant to the action of petrol, lubricating oil and organic solvents.

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Neoprene or polychloroprene is formed by the free radical polymerisation of chloropropane and it is used in making oil seals, tank lining, etc.

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

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Which of the following is the monomer of natural rubber?

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

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The monomer units of polymer Buna-N.

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

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Copolymerization of 1,3 -butadiene and acrylonitrile gives

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

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

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The process involving heating of rubber with sulphur is called