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Polymer Technology

Polymer Technology
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?

Buna-S
PMMA
Polycaprolactum
PTFE

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Polymer Technology
Most of the plastics are safe to be used upto a maximum temperature of __________ °C.

350
100
450
150

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Polymer Technology
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the

Tanning of leather
Electrical insulation purpose
Decorative laminates
Strengthening of plaster of paris

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Polymer Technology
The rate controlling step in the manufacture of silicone rubber is the

Condensation of siloxane to silicone
Polymer termination step
None of these
Initial hydrolysis of silicone monomer

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Polymer Technology
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.

Hydroflouric acid
Sulphuric acid
None of these
Organic peroxides

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Polymer Technology
Polycaprolactum is also known as

Teflon
SBR
Nylon-6
Nylon-66

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