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Polymer Technology

Polymer Technology
Hot drink (e.g, tea) cups are usually made of

Polypropylene
PVC
Polystyrene
Polythene

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Polymer Technology
Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are

250°C and 1 kgf/cm²
250°C and 10 kgf/cm²
50°C and 3 - 4 kg/cm²
50°C and 1 kgf/cm²

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Polymer Technology
The only natural thermoplastic resin, which is a product of animal life is

Amber
Shellac
Rosin
Copal

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Polymer Technology
Thermosplastic materials

Do not soften on application of heat
Are heavily branched molecules
Are solvent insoluble
None of these

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Polymer Technology
Thermoplastic resins usually

Less brittle than thermosetting resins
Can not be reclaimed from waste
Permanent setting resins
Remain hard as long as they are hot

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Polymer Technology
Polycaprolactum is nothing but

Nylon 6
Nylon 6, 6
Saran
Orlon

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