Polymer Technology
The main use of butadiene is

As an anti-skimming agent in paint
In the manufacture of synthetic rubber
None of these
As a plasticiser for unsaturated polyester

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Polymer Technology
Synthetic rubber

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

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