This video lecture from Macromolecules (F.Sc. second year Chemistry) covers the polymerization of styrene into polystyrene using addition polymerization. Initiation, propagation and termination steps are explained for polystyrene. Similarity between styrene and vinyl chloride is discussed in detail. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.