SYNTHETIC FIBRES AND SYNTHETIC FIBRES AND PLASTICSPLASTICS

• Ms. ANUPAMA SINGHMs. ANUPAMA SINGH

PLASTICSPLASTICS•It is a It is a polymerpolymer which which can be moulded into can be moulded into various shapes, can be various shapes, can be recycledrecycled, , remouldedremoulded and and reusedreused..

TYPES OF PLASTICSTYPES OF PLASTICS

•Plastics are of Plastics are of twotwo types:types:

•ThermoplasticsThermoplastics•ThermosettingThermosetting plastics plastics

THERMOPLASTICSTHERMOPLASTICS

•Plastics which can be Plastics which can be mouldedmoulded on on heatingheating and used again.and used again.

•ExampleExample: polythene, : polythene, PVC.PVC.

•The arrangement of The arrangement of particles (particles (monomersmonomers) in ) in thermoplastics is thermoplastics is linearlinear and these can be and these can be recycledrecycled..

POLYTHENEPOLYTHENE

•MonomerMonomer: ethene: ethene•UseUse: for making : for making polythene bags, polythene bags, toys and combs.toys and combs.

PVC (POLY VINYL PVC (POLY VINYL CHLORIDE)CHLORIDE)•MonomerMonomer: vinyl : vinyl chloridechloride

•UseUse: for making : for making pipes, toys and pipes, toys and combs.combs.

THERMOSETTING THERMOSETTING PLASTICPLASTIC•Plastic which once set Plastic which once set cannotcannot be be mouldedmoulded on on heating.heating.

•ExampleExample: Bakelite and : Bakelite and melamine.melamine.

•The arrangement of The arrangement of particles (particles (monomersmonomers) in ) in thermosetting plastic is thermosetting plastic is crosscross linkedlinked and these and these cannot be cannot be recycledrecycled..

BAKELITEBAKELITE•It is a It is a poorpoor conductorconductor of of

heat and electricity.heat and electricity.•UseUse: for making electrical : for making electrical

switches, handles of switches, handles of various utensils.various utensils.

MELAMINEMELAMINE•It is It is resistantresistant to to firefire and and

can tolerate heat.can tolerate heat.•UseUse: for making floor : for making floor

tiles, kitchen ware and tiles, kitchen ware and fabrics which resist fire.fabrics which resist fire.