POLYMER TECHNOLOGY QUIZ

In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?

Nylon-6

Polythene

Polyester

Bakelite (phenol formaldehyde)

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The monomer of poly vinyl chloride (PVC) is

Chloroethene

Ethylene dichloride

Chloroform

Ethyl chloride

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Hot drink (e.g, tea) cups are usually made of

Polythene

Polypropylene

Polystyrene

PVC

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Polycaprolactum is nothing but

Nylon 6

Nylon 6, 6

Orlon

Saran

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Polyvinyl acetate is never used for making

Fibres

All of these

Adhesives

Moulded articles

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Synthetic rubber

Is softer at higher temperature

Deforms, if stretched to double of its original dimension

Is brittle at low temperature

Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases

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The only natural thermoplastic resin, which is a product of animal life is

Rosin

Shellac

Copal

Amber

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In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?

Buna-S

PMMA

Polycaprolactum

PTFE

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Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

Electrical insulation purpose

Decorative laminates

Strengthening of plaster of paris

Tanning of leather

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A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of

Urea-formaldehyde resins

Polyamides

Vinyl polymers

Siloxane elastomers

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