Dictionary Meaning and Definition on 'Thermosetting'
adj : having the property of becoming permanently hard and rigid
when heated or cured; "the phenol resins and plastics
were the original synthetic thermosetting materials"
[syn: thermoset] [ant: thermoplastic]
Wikipedia Meaning and Definition on 'Thermosetting'
A thermosetting plastic, also known as a thermoset, is polymer material that irreversibly cures. The cure may be done through heat (generally above 200 °C (392 °F)), through a chemical reaction (two-part epoxy, for example), or irradiation such as electron beam processing.
Thermoset materials are usually liquid or malleable prior to curing and designed to be molded into their final form, or used as adhesives. Others are solids like that of the molding compound used in semiconductors and integrated circuits (IC's).
According to IUPAC recommendation: A thermosetting polymer is a prepolymer in a soft solid or viscous state that changes irreversibly into an infusible, insoluble polymer network by curing. Curing can be induced by the action of heat or suitable radiation, or both. A cured thermosetting polymer is called a thermoset.[See more about Thermosetting at Dictionary 3.0 Encyclopedia]