Question

Choose the thermoplastics and thermosetting plastics from the following: Melamine, Polythene, Bakelite, Polyvinyl chloride

Answer 1

Answer:

Thermoplastic – polythene, PVC, nylon

Thermosetting plastic – bakelite, melamine

Thermoplastics are plastic materials which get deformed on heating and can be bent easily.

Thermosetting plastics are plastics which can only be moulded once. If they are heated, they tend to break.

Answer 2

Thermoplastics are polythene, polyvinyl chloride, nylon

Thermosetting plastics are Bakelite, melamine

Explanation:

Thermoplastics  

Thermo plastics is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. They are transparent and are used for a wide array of applications from plastic bags to mechanical parts. Some of the  common thermoplastics are acrylic, polyester, polypropylene, polystyrene, nylon and Teflon.

Thermoplastics are polythene, PVC, nylon

Thermosetting Plastics

These are prepared from low molecular mass semi-fluid substances. Thermosetting plastic can withstand very high temperatures. During its curing process, the polymers link together to form a permanent chemical bond. They are poor conductors of heat and electricity and hence used in electric switches, sockets, plus, frying pan handles, etc.

Thermosetting plastics are Bakelite, melamine