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Polymer Technology

Polymer Technology
Cross linked polymers are

Fibres only
Either A or B
Thermosetting
Thermoplastic

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Polymer Technology
Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is

7 kgf/cm² and 700°C
7 kgf/cm² and 70 °C
1000 kgf/cm² and 100°C
1 kgf/cm² (gage) and 70°C

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

Polypropylene
Polyvinyl acetate
Polyvinyl chloride-co-vinylacetate
Polystyrene

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Polymer Technology
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800?

51600
49200
50800
50000

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

Polyamides
Polyurethanes
PVC
Silicone rubber

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

135
85
165
205

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