Compare and contrast the properties and applications of thermoplastics and thermosetting polymers.

Thermoplastics are polymers that soften and become moldable when heated but solidify upon cooling without undergoing chemical change. They can be reshaped multiple times, making them suitable for processes like injection molding and extrusion. Examples include polyethylene, polypropylene, and polystyrene. In contrast, thermosetting polymers undergo irreversible chemical crosslinking upon heating, forming rigid networks that cannot be reshaped. They exhibit superior mechanical strength, heat resistance, and chemical stability, making them ideal for applications such as composites, adhesives, and coatings. Common examples include epoxy resins, phenolic resins, and polyester resins.