Polymer Technology
Viscosity of a polymer solution or melt

Does not vary with temperature rise
Decreases with increase in temperature
Decreases with increase in molecular weight
Increases with increase in temperature

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Polymer Technology
Polyvinyl chloride (PVC)

Softening temperature is 200°C
Can be made thermosetting by adding a plasticiser
Is produced by polycondensation reaction
Uses either emulsion or suspension polymerisation methods

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