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Polymer Technology

Polymer Technology
Commercial production of polypropylene employs __________ polymerisation.

Bulk
Suspension
Emulsion
Solution

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Polymer Technology
Softening point of high density polythene is about __________ °C.

165
85
205
135

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Polymer Technology
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.

Fibrous
Leathery
Hard
Rubbery

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Polymer Technology
The physical state in which polymers exist is

Partially crystalline state
All of these
Amorphous glassy state
Melts & rubber like state

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Polymer Technology
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.

1-1000
1000-1500
1500-2000
2000-2500

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

Saturated polyester
Polyurathane
Either B or C
Polystyrene

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