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  • Question
  • Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is


  • Options
  • A. 7 kgf/cm2 and 70 °C.
  • B. 1000 kgf/cm2 and 100°C.
  • C. 7 kgf/cm2 and 700°C.
  • D. 1 kgf/cm2 (gage) and 70°C.

  • Correct Answer
  • 7 kgf/cm2 and 70 °C. 


  • Polymer Technology problems


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    • 1. Cross linked polymers are

    • Options
    • A. thermoplastic
    • B. thermosetting
    • C. either (a) or (b)
    • D. fibres only
    • Discuss
    • 2. Vulcanisation of rubber does not increase its

    • Options
    • A. softness
    • B. oxidation resistance
    • C. weight & strength
    • D. elasticity & water solubility
    • Discuss
    • 3. The process involved in converting rubber into a thin sheet or coating it on fabric is called

    • Options
    • A. extrusion
    • B. mastication
    • C. calendering
    • D. vulcanisation
    • Discuss
    • 4. Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.

    • Options
    • A. improving the stretchability
    • B. dyeing/colouring
    • C. detergent solution washing
    • D. glycol soaking
    • Discuss
    • 5. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but

    • Options
    • A. polyacrylonitrile
    • B. polyamide
    • C. saturated polyester
    • D. alkyd resin
    • Discuss
    • 6. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher

    • Options
    • A. densities
    • B. melting point
    • C. tensile strength
    • D. hardness, rigidity & brittleness
    • Discuss
    • 7. Nylon-66 is manufactured from

    • Options
    • A. adipic acid and hexamenthylene diamine.
    • B. caprolactum.
    • C. maleic anhydride and hexamethylene diamine.
    • D. dimethyl terephthalate (DMT) and ethylene glycol.
    • Discuss
    • 8. Cation exchange resins used in water treatment is made from __________ resin.

    • Options
    • A. urea formaldehyde
    • B. epoxy
    • C. amino
    • D. phenolic
    • Discuss
    • 9. Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.

    • Options
    • A. acrylic
    • B. polyester
    • C. nylon 6:6
    • D. polypropylene
    • Discuss
    • 10. Which of the following is not a natural polymer?

    • Options
    • A. Nucleic acids e.g. RNA and DNA
    • B. Polysaccharides
    • C. Polyisoprene
    • D. Polyurethane
    • Discuss


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