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Here we will study some 10 main points of difference between Thermoplastics and Thermosetting Plastics.
What is Thermoplastics:
Thermoplastics are the linear polymers, which becomes soft on heating and become hard on cooling.
The molecules of these polymers are synthesized in the shape of long threads and undergo no chemical change in the molding operation.
Some common thermoplastics are polyethylene, PVC, polystyrene, nylon, and acetate.
What is Thermosetting plastics:
Thermosetting Plastics are cross-linked polymers, which becomes soft only on first heating with pressure and get hard permanently on cooling due to chemical changes by condensation and polymerization, and becomes unaffected by the heat or solvents.
Examples and applications of Thermosetting plastics materials:
Epoxy resins – used as coating materials, caulks, manufacture of insulating materials, etc …
Phenolic resins – tool handles, billiard balls, sprockets, insulation, etc …
Unsaturated polyester resins – manufacture of plastics reinforced fiberglass commonly known as polyester, fillers, etc.
Difference between Thermoplastics and Thermosetting Plastics:
|Sl No||Thermoplastics||Thermosetting plastics|
|1.||These are linear polymers.||These are cross-linked polymers|
|2.||They undergo no chemical change in the molding operation.||They undergo chemical change in the molding operation.|
|3.||They can be softened again and again.||They cannot be re-softened once they hard.|
|4.||These plastics can be reused.||These plastics cannot be reused.|
|5.||These are soft and flexible.||These are hard and brittle.|
|6.||They are affected by certain solvents.||They are unaffected by any solvent.|
|7.||They are not fireproof.||They are fireproof.|
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