2. Polystyrene( Styrone)
The monomers are styrene molecules. It is thermoplastic. It is used for making toys, radio and TV cabinets
3. Polyvinylchloride( PVC)
It is used for making rain coats, toys, electrical insulation. It is hard and resistant to heat and chemicals.
4. Polypropylene( PP)
It is obtained by polymerising propylene in the presence of Ziegler-Natta catalyst.