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Polymer Technology

Polymer Technology
__________ polythene is most prone to stress-cracking

High density
Low density
Cross-linked
Linear low density

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Polymer Technology
Which of the following is not a thermoplastic material?

Epoxy polymer
Polythene
PVC
Polystyrene

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Polymer Technology
Molecular weights of plastics ranges from

5000 to 1000
1000 to 5000
20000 to 25000
10⁹ to l0¹¹

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Polymer Technology
Polythene is a/an

Addition polymerisation product
Condensation polymerisation product
Thermosetting material
None of these

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

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

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Polymer Technology
__________ is a copolymer.

Polyrophylene
Poly tetra flouro ethylene
PVC
Nylon-66

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