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POLYMER TECHNOLOGY

Polymer Technology
A copolymer of vinyl and vinylidine chloride is called

Orlon
Saran
Dacron
Treylene

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Polymer Technology
Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.

Nylon
Polyester
Polypropylene
Polyacrylonitrile

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Polymer Technology
Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness?

Rosin
Carbon black
Phosphorous
Pine oil

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Polymer Technology
Styrene butadiene rubber (SBR) is never used for making

Coated fabrics
Front wheel tyres of aeroplanes (i.e., heavy duty tyres)
Soles of shoes
Gaskets

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

0°C and 3 kgf/cm²
0°C and 1 kgf/cm²
5°C and 1 kgf/cm²
- 20°C and 1 kgf/cm²

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