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Polymer Technology

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

165
205
85
135

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Polymer Technology
In condensation polymerisation as compared to addition polymerisation

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

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Polymer Technology
__________ scrap can be recycled & reutilised.

Bakelite
None of these
Polythene
Epoxy resin

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Polymer Technology
__________ practically possess no elasticity.

Spandex fibre
Polysulphide rubber
Epoxy resin
Vulcanite or ebonite

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Polymer Technology
In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.

Polyvinyl acetate
PVC
Polythene
Rayon

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Polymer Technology
Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten

SBR
PVC
Bakelite
Teflon

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