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Polymer Technology

Polymer Technology
Which of the following has the weakest intermolecular forces?

Bakelite
Polystyrene
Polyisoprene
Nylon-66

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Polymer Technology
Addition of stabiliser during PVC manufacture is done to

Improve its impact strength
Reduce the melt viscosity & glass transition temperature
Improve its elasticity
Prevent its thermal degradation

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Polymer Technology
Transistor parts and refrigerator components are normally made of

Polyurathane
Polyester
High density polythene
Polystyrene

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

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Polymer Technology
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.

Solid
Combination of solid & liquid
Neither solid nor liquid
Liquid

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Polymer Technology
Which of the following polymers shows the highest anti-tacking properties?

Alkyd resin
Epoxy resin
Melamine formaldehyde resin
Phenolic resin

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