Question

based on whether the plastic can be deformed easily or not on heating classify the plastics and also give example.


plz give me the answer fast. it is urgent​

Answer 1

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Polythene (Poly+ethene) is an example of a plastic. ... Such plastic which gets deformed easily on heating and can be bent easily are known as thermoplastics. Polythene and PVC are some of the examples of thermoplastics. These are used for manufacturing toys, combs and various types of containers.

Answer 2

Plastic which gets deformed easily on heating and can be bent easily are known as thermoplastics. Polythene and PVC are some of the examples of thermoplastics.

Plastics are categorized into thermosoftening/thermoplastic and thermosetting/thermoset plastics.

In thermosoftening/thermoplastic, the forces between the polymer chains are weak, so they can easily be remoulded into new shapes. 

This makes it possible to recycle this type of plastic. whereas in thermosetting plastics there are strong covalent bonds forming cross-links between the polymer chains, making these plastics hard and rigid. Once set into its original shape, a thermosetting plastic can't be softened and remoulded. 

The strong bonds between polymers also mean that thermosetting plastics are much more heat resistant than thermosoftening ones.