Plastics

CHEMISTRY SEMINARCHEMISTRY SEMINAR

PLASTICSPLASTICS

POLYMERISATIONPOLYMERISATION

POLYMERS WITH WATER POLYMERS WITH WATER REPELLENTREPELLENT

•Silicone polymers do not have carbon •Silicones are water repellent, heat stable, and very resistant to chemical.

SILICONES

PLASTICSPLASTICS

Plastics are Polymers Of Organic Compounds Or Resins that can be moulded Into any shape by the application of heat and pressure.

TYPES OF TYPES OF PLASTICSPLASTICS

Thermos Plastics Or Thermos Plastics Or ThermoplastThermoplast

Thermosetting Plastics or Thermosetting Plastics or ThermosetThermoset

A Plastic material A Plastic material that can be soften when that can be soften when heated with Pressure and heated with Pressure and can me remodeled into can me remodeled into another shape.another shape.

THERMOPLASTICSTHERMOPLASTICS

EXAMPLEEXAMPLEPoly Venyl Chloride

POLYETHENEPOLYETHENE

THERMOSETTING PLASTICSTHERMOSETTING PLASTICS

•THERMOSETTING PLASTICS Have THERMOSETTING PLASTICS Have the property of becoming the property of becoming permanently hard and rigid when permanently hard and rigid when heated or cured. It cannot be heated or cured. It cannot be softened or remoulded. The phenol softened or remoulded. The phenol resins and plastics were the resins and plastics were the original synthetic thermosetting original synthetic thermosetting materialsmaterials

EXAMPLESEXAMPLES

BAKETIE FORMALDEHYDE

MECHANICAL PROPERTIES OF MECHANICAL PROPERTIES OF PLASTICSPLASTICS

The strength to weight ratio of plastics The strength to weight ratio of plastics is higher than that of light metals.is higher than that of light metals.

Plastics Degrade at At high Plastics Degrade at At high temperature.temperature.

Plastics are Good insulators.Plastics are Good insulators.Creep is an important property that it Creep is an important property that it

cannot withstand its own weight and cannot withstand its own weight and undergoes change in shape.undergoes change in shape.

GLASS TRANSITION TEMPERATURE GLASS TRANSITION TEMPERATURE (Tg)(Tg)

A Thermoplastic which becomes A Thermoplastic which becomes an Elastomer (resembles a rubber) on an Elastomer (resembles a rubber) on heating to a particular temperature.heating to a particular temperature.

USES OF BAKELITEUSES OF BAKELITE

Bakelite Called as “Material” Bakelite Called as “Material” OfThousands”has the following uses.OfThousands”has the following uses.

Bakelite was a Water and solvent resistant.Bakelite was a Water and solvent resistant.It is used in the Manufacture Of electrical It is used in the Manufacture Of electrical

Equipments.Equipments.It is used to make telephone, radio and TV cabinets.It is used to make telephone, radio and TV cabinets.

USES OF USES OF FORMALDEHYDEFORMALDEHYDE

• It is a resin  used widely as glue, fire It is a resin  used widely as glue, fire retardant and water repellant.retardant and water repellant.

• It Is Used In tanning industry and for It Is Used In tanning industry and for treating various vegetable proteins treating various vegetable proteins to render them fibrous.to render them fibrous.

• It Is Used For MouldingIt Is Used For Moulding• It Is Used As A Laminating It Is Used As A Laminating AdhesivesAdhesives..

THERMOCOLE (Polystyrene)THERMOCOLE (Polystyrene)

• It is used for making toys, radio, and It is used for making toys, radio, and TV parts.TV parts.

• It is used for making high frequency It is used for making high frequency electrical insulators.electrical insulators.

• It is used for making models and so It is used for making models and so on.on.

POLY VINYL CHLORIDEPOLY VINYL CHLORIDE

• It brings water to our homes, covers our walls and It brings water to our homes, covers our walls and floors, and does countless other important tasks floors, and does countless other important tasks

• PVC is used in fluorescent light diffuser panels. PVC is used in fluorescent light diffuser panels. • PVC is used in wiring and cable covering, shrink-PVC is used in wiring and cable covering, shrink-

on seals on medicine and food containers, on seals on medicine and food containers, shatter-proof bottles, protective clothing, life shatter-proof bottles, protective clothing, life rafts, life jackets, rafts, life jackets, sporting goods,conveyor belts in sporting goods,conveyor belts in coal mines, non-slip flooring, coal mines, non-slip flooring, and foam cores of some and foam cores of some sailing boats. sailing boats.

NYLONNYLON

• Nylon is popular for hosiery and is used to Nylon is popular for hosiery and is used to make track pants, shorts, swimwear, make track pants, shorts, swimwear, active wear, windbreakers, bedspread. active wear, windbreakers, bedspread.

• It is used in making ropes, clothes.It is used in making ropes, clothes.• It is used to make gears and bearings.It is used to make gears and bearings.• It can also be made into It can also be made into

parachutes, combat uniforms, parachutes, combat uniforms, tires and life vests, and in tires and life vests, and in fishing nets, umbrellas.fishing nets, umbrellas.

POLYTHENEPOLYTHENE

• It is used in manufacture of sandwich It is used in manufacture of sandwich bags, cling wrap, car covers, squeeze bags, cling wrap, car covers, squeeze bottles, liners for tanks and ponds, bottles, liners for tanks and ponds, moisture barriers in construction.moisture barriers in construction.

• It is used in freezer bags, water pipes, wire It is used in freezer bags, water pipes, wire and cable insulation.and cable insulation.

• It is used to make Laboratory It is used to make Laboratory

articles.articles.

END OF SEMINAREND OF SEMINAR

THANK YOU ALL 4 GIVING THANK YOU ALL 4 GIVING ME THIS ME THIS GOLDEN GOLDEN OPPURTUNITYOPPURTUNITY

By Your Class MateBy Your Class Mate,,

D.JebastinD.Jebastin