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

Phenolic resin
Melamine formaldehyde resin
Alkyd resin
Epoxy resin

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Polymer Technology
Synthetic rubber

Is softer at higher temperature
Is brittle at low temperature
Deforms, if stretched to double of its original dimension
Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases

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