The distinction between thermoplastics and thermosetting plastics lies in their response to heat. Thermoplastics soften upon heating and harden upon cooling, allowing for repeated reshaping. Thermosetting plastics, however, cure irreversibly upon heating and will degrade rather than soften if heated again.
There are some plastics which when moulded once, cannot be softened by heating. These are called :
Asked in mineral dev officier 2025 · Topic: Polymer (Classification of polymers (based on source, structure, polymerization mechanism, thermal response))
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