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Polymer Technology

Polymer Technology
Collapsible tubes for tooth paste are produced by __________ extrusion.

Impact
Direct
None of these
Indirect

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Polymer Technology
Mastication of rubber means

A treatment to retard its deterioration due to oxidation
Its softening
Depression of its freezing point
Improving its curing rate

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Polymer Technology
Polyesters are manufactured by the polycondensation reaction of

A single monomer
Inorganic acid with ethylene glycol
Dibasic acid with dihydric alcohol
Carboxylic acid with ethylene

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Polymer Technology
Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.

Dyeing/colouring
Glycol soaking
Detergent solution washing
Improving the stretchability

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Polymer Technology
Benzoyl chloride is not used as a catalyst in the manufacture of

Polyvinyl chloride-co-vinylacetate
Polypropylene
Polyvinyl acetate
Polystyrene

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Polymer Technology
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used

For fibre making
For film forming materials
For surface coating of automobiles & air crafts
As plasticiser for PVC & nitrocellulose

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