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  • Question
  • Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.


  • Options
  • A. organic peroxides
  • B. sulphuric acid
  • C. hydroflouric acid
  • D. none of these

  • Correct Answer
  • organic peroxides 


  • Polymer Technology problems


    Search Results


    • 1. Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces

    • Options
    • A. epoxy resin
    • B. polyamide
    • C. alkyd resin
    • D. phenolic resin
    • Discuss
    • 2. Which of the following is not present in bagasse fibre?

    • Options
    • A. Cellulose
    • B. Lignin
    • C. Pentogens
    • D. None of these
    • Discuss
    • 3. Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.

    • Options
    • A. polyurathane
    • B. polysulphone
    • C. polycarbonate
    • D. polyester
    • Discuss
    • 4. Which of the following types of polymers has the strongest inter particle forces?

    • Options
    • A. Elastomers
    • B. Fibres
    • C. Thermoplastics
    • D. Thermosetting polymers
    • Discuss
    • 5. Pick out the wrong statement regarding the solubility characteristics of high polymers.

    • Options
    • A. Greater the degree of cross-linking in the polymer, lesser is its solubility.
    • B. Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents.
    • C. Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent.
    • D. High molecul ar weight polymers on dissolving gives solution of very low viscosity.
    • Discuss
    • 6. Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding

    • Options
    • A. glycerol
    • B. nitro cellulose
    • C. camphor
    • D. none of these
    • Discuss
    • 7. Dacron is a/an

    • Options
    • A. addition polymer
    • B. condensation polymer
    • C. polyester
    • D. both (b) and (c)
    • Discuss
    • 8. Bakelite is a/an

    • Options
    • A. addition polymer
    • B. elastomer
    • C. thermoplastic
    • D. none of these
    • Discuss
    • 9. The major component of acrylic fibres is

    • Options
    • A. polyamides
    • B. polyolefins
    • C. polyacrylonitrile
    • D. polyesters
    • Discuss
    • 10. Tyres are made by

    • Options
    • A. injection moulding
    • B. extrusion
    • C. rotational moulding
    • D. compression moulding
    • Discuss


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