Unformatted text preview: groups of polymer molecules can react with each other. Molecular weight stabilization is usually accomplished by using a small amount of monofunctional B reactant. In this case the same equation apply with r redefined as N B' is the number of B monofunctional molecules and N A = N B = the number of A-B molecules The coefficient 2 is required, since one B molecule has the same quantitative effect as one excess B-B molecules on limitting the growth of a polymer chani. N B + 2 N B' N A r = The plots in Figure 2-10 apply equally well to polymerization of A-B monomers, although the scale of the x-axis may be different....
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This note was uploaded on 10/16/2010 for the course MATSE 441 at Penn State.