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Chemical Engineering :: Polymer Technology

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Polymer Technology - Section 4
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Polymer Technology - Section 6

  1. Identify the group in which all the polymers mentioned can be used to make fibres.

    2. A.
    Butadiene copolymers, Polyamides, Urea aldehyde
    B.
    Cellulose derivatives, Polyisoprene, Polyethylene
    C.
    Cellulose derivatives, Polyamides, Polyurathane
    D.
    Polypropylene, Poly vinyl chloride, Silicon

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  2. Molecular weights of plastics ranges from

    3. A.
    1000 to 5000
    B.
    5000 to 1000
    C.
    20000 to 25000
    D.
    109 to l011

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  3. Non sulphonated hard bakelites are not used for making

    4. A.
    ion-exchange resins
    B.
    fountain pen barrels
    C.
    formica table tops
    D.
    combs

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  4. Which of the following is not present in bagasse fibre ?

    5. A.
    Cellulose
    B.
    Lignin
    C.
    Pentogens
    D.
    None of these

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  5. Epoxy resin is

    6. A.
    not used for surface coating.
    B.
    a good abrasive.
    C.
    an elastomer.
    D.
    a polyester.

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  6. Polymerisation process in which two or more monomers of chemically different nature take part is called

    7. A.
    copolymerisation
    B.
    addition polymerisation
    C.
    chain polymerisation
    D.
    none of these

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  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 ?

    8. A.
    50000
    B.
    51600
    C.
    49200
    D.
    50800

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  8. Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.

    9. A.
    polyurathane
    B.
    polysulphone
    C.
    polycarbonate
    D.
    polyester

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  9. Which of the following types of polymers has the strongest inter particle forces ?

    10. A.
    Elastomers
    B.
    Fibres
    C.
    Thermoplastics
    D.
    Thermosetting polymers

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  10. A copolymer of vinyl and vinylidine chloride is called

    11. A.
    treylene
    B.
    orlon
    C.
    saran
    D.
    dacron

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