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Polymer Technology

Polymer Technology
__________ moulding is used for shaping of thermosetting plastics exclusively.

Injection
Transfer
Extrusion
Compression

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Polymer Technology
In condensation polymerisation as compared to addition polymerisation

Generally only one monomer is involved
The monomers are unsaturated compounds
The monomers contain two functional groups
No co-product is lost

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Polymer Technology
Molecular weights of plastics ranges from

10⁹ to l0¹¹
20000 to 25000
1000 to 5000
5000 to 1000

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Polymer Technology
Styrene which is a monomer for the production of polystyrene, is commercially produced by the

Fermentation of starch
Reacting ethylene oxide with acetal-dehyde
Catalytic dehydrogenation of ethyl benzene
Dehydration of ethyl alcohol followed by hydrogenation

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Polymer Technology
__________ scrap can be recycled & reutilised.

Bakelite
None of these
Epoxy resin
Polythene

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Polymer Technology
Maximum consumption of polymers is in

Toys making
Electrical insulation
Coating and films
Packaging

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