Plastics are widely used materials in daily life. They are mainly classified into two types: thermoplastic and thermosetting plastic. Both have different properties and uses.
1. Thermoplastic
Thermoplastics are plastics that can be softened by heating and hardened by cooling repeatedly without changing their chemical structure.
Examples:
- Polythene (used in plastic bags)
- PVC (used in pipes)
- Nylon (used in ropes and fabrics)
Features:
- Can be remolded again and again
- Softens on heating
- Hardens on cooling
- Recyclable
2. Thermosetting Plastic
Thermosetting plastics are plastics that once heated and molded, cannot be softened again. They become permanently hard.
Examples:
- Bakelite (used in switches and electrical plugs)
- Melamine (used in kitchenware)
- Epoxy resin (used in adhesives)
Features:
- Cannot be remolded after setting
- Hard and strong
- Heat resistant
- Non-recyclable
Simple Difference Table
| Feature | Thermoplastic | Thermosetting Plastic |
|---|---|---|
| Heating effect | Softens on heating | Does not soften again |
| Reusability | Can be reused and remolded | Cannot be reused |
| Structure | Linear or slightly branched | Strong cross-linked structure |
| Examples | PVC, Polythene, Nylon | Bakelite, Melamine, Epoxy |
| Recycling | Recyclable | Non-recyclable |