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Polymer Technology

Polymer Technology
Flexible foam (for mattresses) are usually made of

Polyamides
Polyurethanes
Silicone rubber
PVC

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Polymer Technology
Thermoplastic resins usually

Can not be reclaimed from waste
Less brittle than thermosetting resins
Remain hard as long as they are hot
Permanent setting resins

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Polymer Technology
Condensation polymerisation of __________ produces bakelite.

Phenol & acetaldehyde
Propylene
Phenol & formaldehyde
Urea & formaldehyde

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Polymer Technology
Styrene butadiene rubber is commercially manufactured by

Bulk polymerisation
Emulsion polymerisation
Solution polymerisation
Suspension polymerisation

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Polymer Technology
Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten

Either B or C
Polystyrene
Polyurathane
Saturated polyester

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Polymer Technology
Which of the following is a natural polyamide fibre.

Wool
Silk
Cotton
None of these

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