thermoset

Heat-hardened plastic type

A thermoset is a polymer that hardens permanently when heated, unlike thermoplastics which can be remelted.

Once cured, thermosets maintain their shape even under high heat—they char rather than soften.

Epoxy, polyurethane, and vulcanized rubber are thermosets.

The term works as noun or adjective: thermoset plastics, a thermoset resin.

materials

bakelite

Early thermosetting synthetic resin

  • melamineNitrogen-rich plastic precursor
  • phenolicOf hydroxybenzene compounds
  • epoxyCatalyst-cured bonding compound

silicone · fiberglass · aramid · composite · polyurethane · alkyd · furan

chemistry

resin

Viscous plant secretion

  • curingRestoring health or preserving
  • crosslinkingChemical bonds between polymers
  • epoxyCatalyst-cured bonding compound

phenolic · urethane · polyester · monomer · polymer · hardener · catalyst · vulcanization · polymerization · network

properties

rigid

Unable to bend

chemical-resistant · insoluble · stiff · strong · durable · wear-resistant · high-strength · infusible

processing

molding

Decorative architectural edging

curing · preform · moldability · cavity · autoclave · layup · potting · encapsulation · degassing · demolding

applications

adhesive

Material that bonds objects

aerospace · automotive · encapsulant · sealant · countertop · flooring · electrical · structural

Opposites
thermal behavior/reversibility

thermosetthermoplastic

Heat-softenable, repeatedly reshapable polymer

elastomer

Phrases
Family

thermostat, thermosetting

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Concrete · Rated G