| # |
Thermoplastic / Thermosoftening plastics |
Thermosetting plastics |
| 1. |
The plastics who possess linear long-chain structures without cross-linkages are called thermosoftening plastics. It is also called as thermoplastic. |
The plastics that possess a three-dimensional complicated structure with cross-linkages are called thermosetting plastics. |
| 2. |
They are formed by additional polymerization. |
They are formed by condensation polymerization. |
| 3. |
They consist of polymers of smaller molecular weight. |
They consist of polymers of higher molecular weight. |
| 4. |
They are softer, weaker & less brittle. |
They are harder, stronger & more brittle. |
| 5. |
They have low tensile strength. |
They have high tensile strength. |
| 6. |
Their intermolecular bonds are weak. |
Their intermolecular bonds are strong covalent bonds. |
| 7. |
They soften on heating. |
They do not soften on heating. |
| 8. |
They are soluble in an organic solvent. |
They are insoluble in organic solvent. |
| 9. |
They can be reshaped and reused. |
They cannot be reshaped and reused. |
| 10. |
They can be reclaimed from the waste. |
They cannot be reclaimed from the waste. |
| Examples: |
|
Thermoplastic: Polyethylene, Polypropylene, PVC. |
|
Thermosetting: Epoxy, Phenolic, Melamine. |