Abstract

Abstract Some of the experimental complications which may attend the study of size-distribution curves are indicated. To obtain information on the mechanism from distribution curves, the degree of polymerization must be known. Most information can be obtained if the fraction polymerized is small (say up to 10 per cent polymerized) and if the rate of initiation is kept constant during this reaction period. Fortunately, those conditions which are best suited for the mathematical treatment of the process are also those which avoid many of the experimental complications. Three main types of distribution curves may be distinguished; these are discussed in terms of the mechanism terminating the life of an active growing radical. Such distribution curves, taken in conjunction with other considerations, can greatly extend our knowledge of polymerization reactions.

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