2004
DOI: 10.1021/ma030525m
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Conversion Dependence of the Mean Size of the Star-Branched Polymers Made by AB + Af Type Polycondensation

Abstract: 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 t… Show more

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Cited by 6 publications
(6 citation statements)
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“…[29][30][31][32][33][34][35][36][37][38][39][40][41] However, few AB and AB 2 monomers are available commercially due to tedious synthetic approaches for asymmetric functionality. Moreover, the statistical distribution of segments results in broad compositional distributions, and the concept of average segment length does not accurately describe the structures.…”
Section: Introductionmentioning
confidence: 99%
“…[29][30][31][32][33][34][35][36][37][38][39][40][41] However, few AB and AB 2 monomers are available commercially due to tedious synthetic approaches for asymmetric functionality. Moreover, the statistical distribution of segments results in broad compositional distributions, and the concept of average segment length does not accurately describe the structures.…”
Section: Introductionmentioning
confidence: 99%
“…The result is similar to that of star branched polymers prepared via an AB+A f route, [14] and much different from that of the hyperbranched polymers made by the AB f type monomers without cores moieties, [13] where the former had finite values and the latter trended to infinite when the reaction was quantitatively completed. The difference comes from the topological structure of the tree-like polymers as mentioned above, in which the presence of a small amount of core moiety reduces both the average polymerization degree and polydispersity of the resulting polymers product but leads to less branching and more unreacted core monomers.…”
Section: Average Mean Square Radii Of Gyrationmentioning
confidence: 52%
“…[9][10][11][12][13][14] On the basis of the assumptions of ideal network polymerization, which is the basic model used to describe the polymerization process, the kinetic model of the polycondensation of AB 2 type monomers with B f core-forming molecules was proposed to give a Smoluchowski-like coagulation kinetic differential equation, where the coagulation kernel is proportional to the number of unreacted units on the clusters. By means of kinetic analysis, the straightforward derivation of the MWD and its moments were obtained explicitly.…”
Section: Introductionmentioning
confidence: 99%
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“…Li et al calculated the mean‐square radius of gyration for hyperbranched polymers formed from the polycondensation of A a ‐B b monomer using this method. Ba et al calculated the mean‐square radius of gyration for the AB g ‐type polycondensation and star‐shaped polymerization systems. In a previous publication, we investigated the mean‐square radius of gyration for the co‐polycondensation of AB 2 and AB monomers.…”
Section: Introductionmentioning
confidence: 99%