Conversion Dependence of the Mean Size of the Star-Branched Polymers Made by AB + A f Type Polycondensation

The statistical method was used to give the number of bonds formed for the star-branched polymer chains made by the AB + A f polymerization. On the basis of the kinetic model described by the Smoluchowski-like coagulation equation, the mean-square radii of gyration were given analytically. Furthermo...

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Bibliographic Details
Published in:Macromolecules 2004-05, Vol.37 (9), p.3470-3474
Main Authors: Ba, Xinwu, Han, Yinghui, Wang, Haijun, Tian, Yuelan, Wang, Sujuan
Format: Article
Language:English
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Summary:The statistical method was used to give the number of bonds formed for the star-branched polymer chains made by the AB + A f polymerization. On the basis of the kinetic model described by the Smoluchowski-like coagulation equation, the mean-square radii of gyration were given analytically. Furthermore, the z- and weight-average mean-square radii of gyration were investigated explicitly. The results were much different from that of the hyperbranched polymers made by the AB f type monomers, where the former had the finite values when the reaction was quantitatively completed, and the latter reached the infinite values. In principle, by varying the number of the A f type multifunctional core moieties, the average sizes, as well as the average degrees, can be controlled effectively.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma030525m