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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). Once hardened a thermoset resin cannot be reheated and melted back to a liquid form.
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.[1]
What else can I help you with?
Is a wire thermoplastic or thermosetting plastic?
thermosetting plastic
What is the opposite of thermosetting plastics?
the opposite to thermosetting plastic is thermoplastic
What are the families of plastic?
They are thermosetting plastic and thermoplastic!
Is acrylic a thermosetting plastic?
yes
Is nylon a thermosetting plastic?
yes
What is thermoforming plastic?
thermoforming plastic is completley the oppisite of thermosetting!
Is copper a thermosetting plastic?
No, copper is a metal and not a thermosetting plastic. Thermosetting plastics are a type of polymer that, once cured, cannot be melted or reshaped due to the crosslinking of their molecular structure. Copper, on the other hand, is a malleable metal that can be melted and reshaped.
Is polyester resin a thermo plastic or thermosetting?
Once polyester resin cures (hardens) through a chemical reaction—usually with a catalyst like MEKP—it forms a rigid, cross-linked structure that cannot be melted or reshaped again. This irreversible curing process is the key characteristic of thermosetting materials. In contrast, thermoplastics soften when heated and can be remolded multiple times, which polyester resin cannot do after curing. That’s why polyester resin is widely used in fiberglass, boat hulls, automotive parts, and construction—applications where heat resistance and structural strength are essential.
What is made out of thermosetting?
The most familiar use of thermosetting plastic is the heat-resistant handle on metal cookware. It is also used for bottle caps, knobs and handles, and laminated counter tops. Thermosetting plastics retain their shape and strength even when heated.
Is plastic bottles thermosetting or thermoplastic?
thermoplastic
Is mercury a thermosetting plastic?
No. It is a liquid metal.
What does irreversibly cures mean?
thermosetting plastic
