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State whether the following is true or false.
Atactic polypropylene is a useful commodity plastic.

  • A.False
  • B.True only at large scales
  • C.False only at small scales
  • D.True

Answer: A

The random arrangement of methyl groups prevents crystallisation, so atactic material is a soft tacky solid. Only the isotactic form made with a stereospecific catalyst has useful properties. Tacticity decides whether the polymer crystallises.

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