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Polymer Technology

Polymer Technology
Commercial production of polypropylene employs __________ polymerisation.

Emulsion
Suspension
Solution
Bulk

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Polymer Technology
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are

50°C and 1 kgf/cm²
250°C and 1 kgf/cm²
250°C and 10 kgf/cm²
50°C and 3 - 4 kg/cm²

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Polymer Technology
Polyesters are manufactured by the polycondensation reaction of

Carboxylic acid with ethylene
Dibasic acid with dihydric alcohol
A single monomer
Inorganic acid with ethylene glycol

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Polymer Technology
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.

Dyeing/colouring
Detergent solution washing
Glycol soaking
Improving the stretchability

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Polymer Technology
Orlan fibre which is used as a wool sub stitute is

Polymethylmethacrylate (PMMA)
A natural polymeric fibre
An amorphous polymer
Polyacrylonitrile

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Polymer Technology
Vulcanisation of raw rubber makes it

Soft
Plastic
Tacky
Less elastic

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