A material which will not soften, flow, or distort appreciably when subjected to heat and pressure. Vulcanizable. Examples are rubber and neoprene.

having the property of becoming permanently hard and rigid when heated or cured; "the phenol resins and plastics were the original synthetic thermosetting materials"

A polymeric material that, once having cured (or hardened) by a chemical reaction, will not soften or melt when substantially heated.

Polymeric materials which harden when exposed to high temperatures and pressures but cannot be softened or re-melted upon further heating; the hardening of polymeric materials upon heating is due to a largely irreversible chemical reaction.

(1) A material which cannot be reshaped or formed by heating; cured synthetic rubber sheet materials (EPDM, Butyl, etc.) are thermosets; (2) Hardening permanently when heated, owing to cross linking of polymeric resins into a rigid matrix.

The term applied to resins which become hard after heating and cannot be resoftened.

A powder coating designed to undergo an irreversible chemical change during the cure schedule. Typical examples are acrylic, epoxy, and polyester.

a type of plastic which once set cannot be re softened or melted

thermosetting plastic. Compare with thermoplastic. A polymer that solidifies on heating and cannot be remelted. The setting action results from crosslinking of the polymer chains at high temperature- a process that is not reversed by cooling and reheating.

Resins having the property of becoming insoluble or hard upon the application of heat.

Said of plastics which harden when their polymer chains reticulate in response to heat, radiation and/or a reagent. The chemical bonds thus formed make the material insoluble, more rigid and more temperature-resistant. After reticulation, thermosetting polymers cannot be softened or mechanically recycled without first being broken down.

Binder or polymer hardening due to heating to a temperature where cross-links form between the polymer chains. Unlike a thermoplastic that can be softened by reheating, a thermosetting binder becomes hard on the first heating cycle and can not be subsequently softened.

A material which hardens by chemical reaction. Not remeltable. The reaction usually gives off heat.

A method of thermoforming in which plastics can be melted only once. After melting, they harden as heat is added. Widely used thermoset plastics include epoxy, polyester, silicone and urethane.

A resin that polymerizes when subjected to heat. Epoxies are thermosetting.

A classification of resin which cures by chemical reaction when heated and, when cured, can not be resoftened by heating.

Describes the property of an epoxy, to set or become rigid and non-meltable when heated with or without pressure.