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Question
Distinguish between thermoplastic polymers and thermosetting polymers.
Solution
| Thermosetting Polymers | Thermoplastic Polymers | |
| 1. | They do not soften on heating pressure. | They soften on heating and harden on cooling. |
| 2. | They cannot be remoulded, recycled or reused. | These can be remoulded or reshaped. |
| 3. | These have cross-linked structures. | These have linear structures. |
| 4. | They are formed by condensation polymerization. | They are formed by addition polymerization. |
| e.g. | Bakelite, urea-formaldehyde resins, etc. | PVC, polythene and polystyrene, etc. |
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