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Chemical Engineering :: Polymer Technology

  1. Thermosetting polymers as compared to thermoplastic polymers

  2. A.
    are formed by addition polymerisation.
    B.
    have three dimensional structure.
    C.
    have linear structure.
    D.
    none of these.

  3. The monomer of natural rubber is

  4. A.
    DMT
    B.
    isoprene
    C.
    2 methyl-1-propene
    D.
    both (b) and (c)

  5. In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.

  6. A.
    polythene
    B.
    PVC
    C.
    rayon
    D.
    polyvinyl acetate

  7. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces

  8. A.
    epoxy resin
    B.
    polyamide
    C.
    alkyd resin
    D.
    phenolic resin

  9. Dacron is a/an

  10. A.
    addition polymer
    B.
    condensation polymer
    C.
    polyester
    D.
    both (b) and (c)

  11. __________ polymer is used for making unbreakable crockery.

  12. A.
    Thermoplastic
    B.
    Melamine
    C.
    Addition
    D.
    none of these

  13. Flexible plastic pipes are made of

  14. A.
    high density polyethylene (HDPE).
    B.
    low density polyethylene (LDPE).
    C.
    polypropylene.
    D.
    unsaturated polyester.

  15. Main constituent of natural rubber is

  16. A.
    polystyrene
    B.
    polyisoprene
    C.
    polybutadiene
    D.
    poly chloroprene

  17. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

  18. A.
    hexamethylene diamine and the ring.
    B.
    hexamethylene diamine and the adipic acid.
    C.
    adipic acid and the ring.
    D.
    none of these.

  19. Thermal pyrolysis of ethylene dichloride produces

  20. A.
    trichlorethylene
    B.
    vinyl chloride
    C.
    ethanol amine
    D.
    ethylene oxide