Abstract
This paper delivers a flexible formalism for handling equilibrium ring formation. Based on graphical models of polymerization, it includes as special cases the Flory-StockmayerRA f model, the FloryA f RB g model, and Gordon's branching process formalism. When simple ring formation occurs in equireactive systems, it also includes the Jacobson-StockmayerRA 2 and HoeveRA f models. The formalism is built from first principles in statistical mechanics and all assumptions are clearly stated. All parameters are given in terms of thermodynamic variables. With ring weights generalizing the Jacobson-Stockmayer Gaussian random walk, the formalism yields results for branchingRA f ,A f RB g , andRA f -RB g polymer models. Equireactivity then gives explicit solutions. The equireactiveRA f -RB g model compares favorably with data from gel-point vs. dilution experiments. With the exception of the Spanning Tree Approximation, graphical models of polymerization suffer from combinations of the following defects: equireactivity assumptions, restrictions to one type of monomer or bond, absence of rings, or absence of fused rings. This paper provides a promising “exact” approach to handling all of these problems simultaneously.
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Spouge, J.L. Equilibrium ring formation in polymer solutions. J Stat Phys 43, 143–196 (1986). https://doi.org/10.1007/BF01010576
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DOI: https://doi.org/10.1007/BF01010576