Question

Plastics are capable of molding and casting into various shapes and sizes of plastic.

• A. True
• B. False

Answer 1

The correct option is A True

Plastics are categorized into Thermosoftening and Thermosetting plastics. In Thermosoftening plastics, the forces between the polymer chains are weak, so they can easily be remolded 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 remolded. The strong bonds between polymers also mean that thermosetting plastics are much more heat resistant than Thermosoftening ones.
Example: Melamine is an example of thermosetting plastic and polythene is a Thermosoftening plastic.
Option A is correct.