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An epoxy resin is cured by adding a

  • A.plasticiser that separates the chains
  • B.filler that increases the bulk
  • C.solvent that evaporates during setting
  • D.hardener that opens the epoxide rings

Answer: D

An amine or anhydride reacts with the terminal rings and knits the molecules into a network, so the proportions must be right and the mixture has a working life. Its adhesion and chemical resistance make it the standard structural adhesive.

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