Summary
A kinetic model of formation of hyperbranched polymers by step polyaddition of a BA f monomer including cyclization was developed. Reactions between acyclic-acyclic and acyclic-cyclic molecules and cyclization within acyclic molecules were considered. For cyclization within isomers of an x-mer, a bridging function between linear and spherical structures was used. Fractions of cyclic x-mers are predicted to increase with increasing degree of polymerization x and overall conversion of B groups. High fractions of cyclics were found in poly[2,2-bis(hydroxymethyl)propanoic acid] (poly (dimethylolpropionic acid)) by mass spectroscopy (ESI/FT MS) in a reasonable agreement with the model.
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Received: 4 December 1998/Revised version: 17 February 1999/Accepted: 17 February 1999
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Dušek, K., Šomvársky, J., Smrčková, M. et al. Role of cyclization in the degree-of-polymerization distribution of hyperbranched polymers Modelling and experiments. Polymer Bulletin 42, 489–496 (1999). https://doi.org/10.1007/s002890050493
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DOI: https://doi.org/10.1007/s002890050493