Polymer Technology - Chemical Engineering Questions and Answers

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Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?

Phosphorous

Carbon black

Pine oil

Rosin

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__________ is an addition polymer

Nylon

Bakelite

Polythene

none of these

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Branched chair polymers as compared to linear polymers have

higher melting point.

higher tensile strength.

lower density.

none of these.

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Ion exchange resins are made of

lucite

sulphonated bakelite

polystyrene

teflon

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Rayon is superior to cotton in making gauge for wound treatment, because rayon

is a synthetic polymer.

does not stick to the wound unlike cotton.

can absorb over 90% of its own weight of water.

both (b) and (c).

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__________ is a thermosetting plastic.

PVC

Polythene

Bakelite

polystyrene

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__________ is a natural fibre.

Cellulose

Dacron

Nylon-6

none of these

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Pick out the wrong statement.

Polymeric fibres are never produced by addition polymerisation.

Property of tackiness is exhibited by uncured rubber.

Sharp melting point is not observed in thermoplastic polymers.

Polythene generally has an excellent resistance to ultra violet rays.

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Perspex can be used as a substitute of glass. Its monomer is

methyl methacrylate

DMT

butadiene

tetrafluroethylene