Synthetic Fibres and Plastics — Science STD 8 — Question
Gujarat BoardEnglish MediumSTD 8ScienceSynthetic Fibres and Plastics3 Marks
Question
Explain the difference between thermoplastics and thermosetting plastics.
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Answer
Thermoplastics: The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. For example, polythene and $PVC$ are thermoplastics. These are used in the manufacturing of toys, combs and different types of containers. Thermosetting plastics: The plastics which when molded once, cannot be softened by heating are called thermosetting plastics. For example, Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. It is used to make electrical switches and handles of utensils. Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. It is used to make floor tiles, kitchenware and fire-resistant fabrics.
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