Polystyrene is a ____________ plastic at room temperature?
Correct answer: B. Brittle
- A. Ductile
- B. Brittle
- C. Malleable
- D. None of these
Explanation
At room temperature, ordinary polystyrene is rigid and brittle because its glass-transition temperature is above room temperature. It does not show the ductility associated with many elastomers or ductile plastics.
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