adjective

• Denoting substances (especially synthetic resins) which set permanently when heated.

  Often contrasted with thermoplastic

  ‘After polymerisation using heat, light, radiation, or catalysis a range of strong thermosetting plastics can be produced.’

  More example sentences

  • ‘The methanal can then be used in the manufacture of thermosetting plastics.’
  • ‘He called this material Bakelite - after himself - and it was the first thermosetting plastic in the world.’
  • ‘‘We developed an aromatic thermosetting polymer for use as an insulating material in copper chip technology,’ said James Economy, a professor of materials science and engineering at Illinois.’
  • ‘Made from fiberglass reinforcements and thermosetting polyester, the products come in many shapes and are corrosion resistant, strong, lightweight, and dimensionally stable, the manufacturer says.’