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Kinetics of pseudostationary free radical polymerization—I. A first approach

✍ Scribed by Oskar Friedrich Olaj; Gerhard Zifferer

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
477 KB
Volume
25
Category
Article
ISSN
0014-3057

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✦ Synopsis

A general analysis of pseudostationary polymerization kinetics in the absence of chain transfer is presented. In the course of the treatment, a set of "higher order" pseudostationary conditions is established and it proves to be extremely helpful in dealing with degrees of polymerization. It is found that, in the long chain limit, several relations (particularly that between the product of rate of polymerization and the weight-average degree of polymerization) are of full general validity and remain unaffected by the detailed conditions of (periodic) initiation. Furthermore, the additional broadening of the chain length distribution relative to stationary polymerization can be correlated in a simple manner with the dispersion of instantaneous radical concentrations RI, R~/(R~) 2.

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