|
Authors
|
Kumar, K. S.; Lang, M.
|
|
Title
|
Reversible Networks Made of Star Polymers: Mean-Field Treatment with Consideration of Finite Loops
|
|
Date
|
12.09.2023
|
|
Number
|
0
|
|
Abstract
|
We develop a theoretical approximation for the microstructure and properties of reversible networks made of star polymers based upon a set of suitable balance equations. This model generalizes the tree approximation (ideal networks) regarding the formation of the smallest loops. The model is tested by Monte Carlo simulations of model networks with controlled formation of cyclic structures. If only pending loops are considered, both irreversible and reversible networks develop a unique critical concentration ccrit for gelation in the limit of high functionality f → ∞ of the star polymers. Intramolecular reactions are preferred in reversible networks as compared to irreversible systems at the same concentration and fraction of bound reactive groups. Odd–even effects develop at small f once pending loops are possible, and these regard the critical concentration, network properties like weight fraction of gel, weight fraction of the elastically active material, and modulus. A precise consideration of loops involving a number of g ≥ 2 junctions inside a loop requires the consideration of correlations between connected stars.
|
|
Publisher
|
Macromolecules
|
|
Wikidata
|
|
|
Citation
|
Macromolecules 56 (2023) 7166–7183
|
|
DOI
|
https://doi.org/10.1021/acs.macromol.3c00796
|
|
Tags
|
|
