Premium
Distributions of Molecular Weights and 3D Sizes of Hyperbranched Polymers Formed in Batch Self‐Condensing Vinyl Polymerization
Author(s) -
Tobita Hidetaka
Publication year - 2021
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.202000052
Subject(s) - radius of gyration , branching (polymer chemistry) , monomer , polymer chemistry , polymerization , molar mass distribution , gyration , polymer , degree of polymerization , chemistry , molecule , polymer science , materials science , organic chemistry , mathematics , geometry
It is known that the step polymerization of AB 2 ‐type monomer leads to form random hyperbranched architecture, irrespective of the reactivity of the second B group. On the other hand, the hyperbranched structure formed in the self‐condensing vinyl polymerization of AB* monomer is now shown to be nonrandom because of the persistent history‐dependent connection through the A * group. The molecular weight distribution deviates from that of the random branched polymers. On the other hand, the nonrandom effect on the 3D architecture is rather small, and the expected g ‐ratio of the unperturbed mean‐square radius of gyration 〈 s 2 〉 0 of the branched molecule to that of a linear molecule for a given number k of branch points agrees well with the Zimm–Stockmayer equation that assumes random branching of primary chains having the most probable distribution.