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Polymer Technology

Polymer Technology
Which of the following low molecular weight (

Cellulose acetate
PVC
Thiokol
Polyvinyl acetate

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

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

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Polymer Technology
Branched chain polymers compared to linear polymers have higher

Melting point
Density
Degree of irregularity in atomic packing
Tensile strength

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Polymer Technology
Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?

Silicone rubber
Butyl rubber
Nitrile rubber
Silicon rubber

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Polymer Technology
__________ is not a polyester fibre.

Nylon
Polyacrylonitrite
Terylene
Dacron

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Polymer Technology
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic

Tubings
Filaments
Pipes
Buckets

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