WebMay 13, 2024 · In the present article, we use an improved Flory-Rehner theory to describe the swelling behavior of copolymer microgels, where the interaction parameter is modeled by a Hill-like equation for a cooperative thermotropic transition. This description leads to very good fits of the swelling curves of the copolymer microgels at different comonomer ... WebApr 15, 2024 · The Flory–Rehner and Bray–Merrill swelling theories are venerable theories for calculating the swelling of polymer networks and are widely applied across polymer materials. Here, these theories are revised to include cyclic topological defects present in polymer networks by using a modified phantom network model. These closed-form …
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WebDec 1, 2024 · The Flory-Rehner equation is used to define equilibrium swelling of the hydrogels (polymer chains) with the good solvent and following the equation [[62], [63], [64]] (6) ρ x = − ln 1 − V r + V r + χ V r 2 V s V r 1 3 − 0.5 V r where V s is the molar volume of solvent and χ is the Flory-Huggins polymer-solvent interaction parameter. WebPolymer swelling can be analysed by the Flory-Rehner equation which shows how the swelling is related to the MWt of chains between crosslinks - with larger values allowing … d v r 2023 ewhc 406 fam
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WebApr 30, 2024 · The crosslink density ν was calculated by the Flory–Rehner Equation (1), where M c is the molecular weight of the rubber between crosslinks. ν r o is the volume fraction of the swollen rubber, V 1 is the molar volume of the solvent, and χ 1 is the interaction coefficient indicating the reactivity between the polymer and the solvent. Web4) i) The functionality can be described by the Flory-Rehner equation: () v Kdangling chain v n V v v v 3 1 2 2 1 2 2 2 2 2 ln 1 ⎥ ⎦ ⎤ ⎢⎣ ⎡ − + +χ = − where n is the molecular weight between crosslinks, v2 is 1/qm, χ is the interaction parameter and V1 is the molar volume of the solvent. q increases with n because the elastic ... Web512 P. J. FLORY AND J. REHNER, JR. Equation (12) was used to find the curves shown in Fig. 1. The rate expression involving the acid chro mate ion is -d(Cr03)/dt = k(HCr04-) (CH3CHOHCH3) (H+)2. (6) The concentration of acid chromate ion can be calculated from the equilibrium expression where the parentheses indicate concentrations, dvr4-1000 software windows 10