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Polymer Technology - Section 6

  1. The inter particle forces between linear chains in nylon-66 are __________ bonds.

    2. A.
    hydrogen
    B.
    covalant
    C.
    ionic
    D.
    none of these

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  2. Molecular weight of polymers are in the range of

    3. A.
    10 to 103
    B.
    102-107
    C.
    107-109
    D.
    109-1011

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  3. The physical state in which polymers exist is

    4. A.
    melts & rubber like state.
    B.
    amorphous glassy state.
    C.
    partially crystalline state.
    D.
    all (a), (b) and (c).

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  4. Orlon is

    5. A.
    a copolymer.
    B.
    a condensation polymer.
    C.
    obtained by polymerising vinyl cyanide.
    D.
    all (a), (b) and (c).

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  5. Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an

    6. A.
    rigid foam
    B.
    engineering plastic
    C.
    thermosetting polymer
    D.
    spongy rubber

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  6. Contact lenses for eyes are made of perspex, which is nothing but

    7. A.
    polymethylmethacrylate
    B.
    polystyrene
    C.
    unsaturated polyester
    D.
    polypropylene

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  7. The repeating units of PTFE are

    8. A.
    Cl2CH-CH3
    B.
    F2 C = CF2
    C.
    F3 C-CF3
    D.
    FClC = CF2

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  8. Low pressure Zeigler process of polythene manufacture

    9. A.
    employs a pressure of 30 kgf/cm2.
    B.
    achieves an yield of 95-98% based on ethylene.
    C.
    produces very low density polythene.
    D.
    does not use any catalyst for polymerisation.

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  9. __________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).

    10. A.
    Unsaturated polyester
    B.
    Alkyd resins
    C.
    Saturated polyester
    D.
    Amino resins

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  10. Which of the following is an elastomer ?

    11. A.
    Thiokol
    B.
    Phenol formaldehyde
    C.
    Urea formaldehyde
    D.
    Polystyrene

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