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Polyvinyl Chloride
(PVC) 
- Linear chain, different from PE
due to the presence of atactically
spread Chlorine
- Rigid relatively hard, mixed with
Plasticizers to make Pipes,
Cable Covering, Fabric of Plastic
Raincoat, Shoe soles, Inflatable
Chains
- Chlorine Inhibits Combustion
Polypropylene (PP)
- Linear Polymer, isotactic, used in
crystalline form, Tm > 160oC
- Side Chains (Methyl) increase
fatigue and impact resistance
- Used for Crates, Fans, TV and
Radio Cabinets
- A copolymer Polypropyleneethylene
(EPM) in low ratio
increases impact strength, high
and random make it elastomer
Polystyrene (PS)
- Linear Chain with Bulky side
Phenyl group, smooth finish
- Use for injection molding
components, light fittings, ball point
pen barrel
- PS with rubber particles increase
impact resistance, casings for
cameras etc.
- Susceptible to Stress Corrosion by
detergents
- Styrofoam for foam packaging and
insulation
Styrene
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