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Chemical Engineering :: Polymer Technology

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Polymer Technology - Section 5
Polymer Technology - Section 6

  1. Branched chain polymers compared to linear polymers have higher

    2. A.
    density.
    B.
    tensile strength.
    C.
    melting point.
    D.
    degree of irregularity in atomic packing.

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  2. Styrene butadiene rubber is commercially manufactured by

    3. A.
    bulk polymerisation
    B.
    suspension polymerisation
    C.
    solution polymerisation
    D.
    emulsion polymerisation

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  3. __________ polythene is most prone to stress-cracking

    4. A.
    High density
    B.
    Low density
    C.
    Cross-linked
    D.
    Linear low density

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  4. Acrylonitrile is mainly used in the __________ industry.

    5. A.
    polymer
    B.
    printing
    C.
    dyeing
    D.
    photographic

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  5. Collapsible tubes for tooth paste are produced by __________ extrusion.

    6. A.
    direct
    B.
    indirect
    C.
    impact
    D.
    none of these

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  6. Which of the following is not an elastomer ?

    7. A.
    Polyisoprene
    B.
    Neoprene
    C.
    Nitrile-butadiene
    D.
    None of these

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  7. Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically

    8. A.
    polymethyl methacrylate (PMMA).
    B.
    Polytetraflouroethylene(PTFE).
    C.
    polycarbonates.
    D.
    phenolic resins.

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  8. __________ is a copolymer.

    9. A.
    styrene butadiene rubber (SBR)
    B.
    Neoprene
    C.
    PVC
    D.
    None of these

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  9. Polyvinyl chloride (PVC)

    10. A.
    is produced by polycondensation reaction.
    B.
    uses either emulsion or suspension polymerisation methods.
    C.
    can be made thermosetting by adding a plasticiser.
    D.
    softening temperature is 200°C.

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  10. Which of the following is not a condensation polymer ?

    11. A.
    Bakelite
    B.
    Melamine polymer
    C.
    Polymethylmethacrylate (PMMA)
    D.
    None of these

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