Particularities in the Preparation of Polymers

Especially in the case of macromolecular materials, not only the method of synthesis, but also the manufacturing process has a large influence on size and structure of the molecules, and consequently on the physical properties. For example, poly(vinyl chloride), produced by radical polymerization in suspension, differs in some practical properties from PVC obtained by radical polymerization in bulk. Changes in the 

Bis-chloro-carboxylic acid esters Linear polyurethanes 

polyether diols Diisocyanates (X = arylene or alkylene) Polyurethanes 

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