explain the differences between thermoplastics and thermosetting plastics.
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The main difference between Thermoplastics and Thermosetting plastics is that Thermoplastics can be heated and shaped over and over again - Thermosetting plastics can only be heated and shaped once.
Listed below are the differences between them:
Formed by addition Polymerization.
Formed by condensation Polymerization.
Long chain linear polymers
Three dimensional network
structure joined by strong covalent
Soften on heating and stiffen on
Do not soften on heating
Can be remoulded
Cannot be remoulded
Usually soft, weak & less brittle
Usually hard, strong & more brittle
Can be reclaimed from wastes
Cannot be reclaimed from wastes
Soluble in organic solvents
Insoluble in organic solvents
Some plastics can be bent easily while some break when forced to bend. When we add hot water to a plastic bottle, it gets deformed. Such plastic , which gets deformed easily on heating and can be bent easily are called thermoplastics.
On the other hand, there are some plastics , which when moulded once, cannot be softened by heating. These are celled thermosetting plastics.