Rubbers & their formations - Material Science

Q.  Match the following group 1 items(rubbers) with group 2 items (Rubber formation) and select the correct option

1. Nitrate rubbers ----------------------------------- A. copolymerization of butadiene and styrene
2. Butadiene rubbers ------------------------------- B. polymerization of isobutylene with isoprene
3. Neoprenes ----------------------------------------- C. copolymerization of butadiene and crylonitrite
4. Butyl rubbers ------------------------------------- D. polymerization of chloroprene molecules
- Published on 05 Aug 15

a. 1 – A, 2 – D, 3 – B, 4 - C
b. 1 – B, 2 – C, 3 – D, 4 - A
c. 1 – C, 2 – A, 3 – D, 4 – B
d. 1 – C, 2 – B, 3 – A, 4 - D

ANSWER: 1 – C, 2 – A, 3 – D, 4 – B

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    Discussion

  • Sravanthi   -Posted on 12 Oct 15
    • Nitrite rubbers are produced due to coploymerization of butadiene & crylonitrite. These rubbers have excellent solvent, oil and grease resistance. They have better resistance to aging & abrasion.
    Application: Nitrite rubbers are used for tank lining conveyor belts.

    • Butadiene rubbers are formed due to copolymerization of butadiene and styrene. These rubbers have high resistance to weathering and abrasion
    Application: Automobile tyres, electric wire insulation, belts etc.

    • Neoprenes rubbers are formed due to polymerization of chloroprene molecules. They are also called as polychloroprenes. These rubbers have high resistance to greases, oils, aging etc.
    Application: Gaskets, tank linings, adhesives etc.

    • Butyl rubbers are formed due to polymerization of isobutylene with isoprene or butadiene. These rubbers have high impermeability to gases and high resistance to oxidizing agents.
    Application: Cable insulation, inner tubes, adhesives etc.

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