Give some examples of thermoplastic and thermosetting plastic.

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Examples of thermoplastic plastics: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS). Examples of thermosetting plastics: phenol formaldehyde (bakelite), epoxy resin, melamine formaldehyde, urea formaldehyde.

Thermoplastic: plastics that soften when heated and can be remoulded multiple times. Examples:
- PE (polyethylene) – used in plastic bags, bottles.
- PP (polypropylene) – used in containers, automotive parts.
- PVC (polyvinyl chloride) – used in pipes, cables.
- PS (polystyrene) – used in disposable cutlery, packaging foam.
Thermosetting plastic: plastics that once cured or set cannot be remoulded by heating. Examples:
- Phenol formaldehyde (bakelite) – old electrical insulators.
- Epoxy resin – coatings, adhesives, composite materials.
- Melamine formaldehyde – kitchenware, laminates.
- Urea formaldehyde – low-cost adhesives, moulded objects.

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