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Question
Which polymer among the following polymers does NOT soften on heating?
Which polymer among the following polymers does NOT soften on heating?
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Solution
The correct option is A Bakelite
Thermoplastics:A plastic material, which can be repeatedly melted-molded again and again by simple heating, is called a thermoplastic. Thermoplastics become soft and moldable on heating. They can then be recast in different shapes and cooled. On cooling the thermoplastic material hardens.
Polyethylene, polystyrene and PVC are examples.
Thermosetting plastics:A plastic material, which cannot be repeatedly melted-molded again, is called a thermosetting plastic.thermosetting plastics do not become soft on heating and they do not change their shape on heating.Bakelite is one example of a thermosetting plastic.
Thermoplastics:
A plastic material, which can be repeatedly melted-molded again and again by simple heating, is called a thermoplastic. Thermoplastics become soft and moldable on heating. They can then be recast in different shapes and cooled. On cooling the thermoplastic material hardens.
Polyethylene, polystyrene and PVC are examples.
Thermosetting plastics:
A plastic material, which cannot be repeatedly melted-molded again, is called a thermosetting plastic.thermosetting plastics do not become soft on heating and they do not change their shape on heating.
Bakelite is one example of a thermosetting plastic.
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