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  • Question
  • Vulcanisation of rubber


  • Options
  • A. decreases its tensile strength.
  • B. increases its ozone & oxygen reactivity.
  • C. increases its oil & solvent resistance.
  • D. converts its plasticity into elasticity.

  • Correct Answer
  • converts its plasticity into elasticity. 


  • Polymer Technology problems


    Search Results


    • 1. Phthalic anhydride is used

    • Options
    • A. in making PVC
    • B. as plasticisers
    • C. in insecticides manufacture
    • D. for making nylon-6
    • Discuss
    • 2. The monomer of natural rubber is

    • Options
    • A. DMT
    • B. isoprene
    • C. 2 methyl-1-propene
    • D. both (b) and (c)
    • Discuss
    • 3. Polycaprolactum is also known as

    • Options
    • A. nylon-66
    • B. nylon-6
    • C. teflon
    • D. SBR
    • Discuss
    • 4. Teflon is

    • Options
    • A. phenol formaldehyde
    • B. an inorganic polymer
    • C. polytetra florouethylene (PTFE)
    • D. a monomer
    • Discuss
    • 5. Polythene is a/an

    • Options
    • A. addition polymerisation product.
    • B. condensation polymerisation product.
    • C. thermosetting material.
    • D. none of these.
    • Discuss
    • 6. __________ is produced by polymerisation of chloroprene.

    • Options
    • A. Thiokol (a polysulphide rubber)
    • B. Butyl rubber
    • C. Neoprene
    • D. Polyurathane rubber
    • Discuss
    • 7. Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?

    • Options
    • A. 50000
    • B. 51600
    • C. 49200
    • D. 50800
    • Discuss
    • 8. The starting material used for the manufacture of caprolactum is

    • Options
    • A. ethyl benzene
    • B. cyclohexane
    • C. ethylene glycol
    • D. DMT
    • Discuss
    • 9. __________ is a copolymer.

    • Options
    • A. styrene butadiene rubber (SBR)
    • B. Neoprene
    • C. PVC
    • D. None of these
    • Discuss
    • 10. Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten

    • Options
    • A. saturated polyester
    • B. polyurathane
    • C. polystyrene
    • D. either (b) or (c)
    • Discuss


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