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Compression moulding is used chiefly for

  • A.thermoplastics of low melt viscosity
  • B.elastomers before vulcanisation only
  • C.polymers that cannot be heated at all
  • D.thermosetting resins

Answer: D

A measured charge is squeezed in a heated mould and cures there, which suits a material that sets irreversibly. A thermoplastic would have to be cooled before the mould could be opened, which makes the cycle uneconomic.

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