Plastic bottles, tubing, household equipment. Epoxy resin. Good electrical insulator, hard, brittle unless reinforced, resists chemicals well. Casting and encapsulation, adhesives, bonding of other materials.
Melamine formaldehyde. Stiff, hard, strong, resists some chemicals and stains. Laminates for work surfaces, electrical insulation, tableware. Polyester resin. Laminated, good electrical insulator, resists chemicals well. Casting and encapsulation, bonding of other materials. Urea formaldehyde. Stiff, hard, strong, brittle, good electrical insulator. Sometimes the heat is applied externally, but it may come from the chemical reaction of mixing ingredients. Adding pressure, a catalyst, or a hardener can increase the curing rate.
Once cured, a thermosetting plastic cannot be re-melted, so it is formed into its final shape by injection molding, extrusion molding, compression molding, or spin casting. Heat makes a thermosetting plastic irreversibly rigid, but it makes a thermoplastic moldable or pliable. A thermoplastic then hardens again upon cooling. Helmenstine, Anne Marie, Ph. Thermosetting Plastic Definition. Plastic Definition and Examples in Chemistry.
What Is a Peptide? Definition and Examples. A Brief History of the Invention of Plastics. Polysaccharide Definition and Functions.
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