Modeling of Acrylamide/<i>N</i>,<i>N</i>′-Methylenebisacrylamide Solution Copolymerization

Lazzari, Stefano; Pfister, David; Diederich, Vincent; Kern, A.A.; Storti, Giuseppe

doi:10.1021/ie403544d

Cited by 9 publications

(8 citation statements)

References 50 publications

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“…The polymer network prepared in the presence of solvent has a loose network whereas that of prepared in bulk conditions has a tight structure including interpenetrated network chains. Since the synthesis process of the Hgs includes a high degree of complexity, the modeling and optimization approaches have been developed based on the simulations as well as neural networks to define the nature of the polymerization process where an understanding of the gelation phenomenon is limited . Curteanu and coworkers reported that the artificial neural networks can be used to make predictions for the synthesis of a one‐pot process of PAAm‐based Hgs, especially emphasizing some possibilities of theoretical study.…”

Section: Resultsmentioning

confidence: 99%

“…Since the synthesis process of the Hgs includes a high degree of complexity, the modeling and optimization approaches have been developed based on the simulations as well as neural networks to define the nature of the polymerization process where an understanding of the gelation phenomenon is limited. 41,42 Curteanu and coworkers 43 reported that the artificial neural networks can be used to make predictions for the synthesis of a one-pot process of PAAmbased Hgs, especially emphasizing some possibilities of theoretical study. Neural networks including five inputs; the concentrations of monomer, initiator, crosslinking agent, temperature, and time and corresponding two outputs; the polymer yield and the swelling degree were designed to test several topologies and to identify the reaction conditions which lead to an imposed reaction yield or a maximum swelling degree.…”

Section: Influence Of the Monomer Concentration On Equilibrium Swellimentioning

confidence: 99%

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Tunable elasticity and thermodynamic parameters of hydroxypropyl methacrylate‐based gels with varying extents of monomer concentration: Statistical mechanics treatments of physical observations

Orakdöğen

Sanay

2017

J of Applied Polymer Sci

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The present article reports the scaling laws relating the preparation conditions with the equilibrium swelling degree and the crosslinking density of a new family of hydroxyl functional hydrogels (Hgs) prepared by free radical crosslinking polymerization of hydroxypropyl methacrylate (HPMA) in aqueous solution with tetraethylene glycol dimethacrylate (TEGDMA) as crosslinker. For comparison of physical properties, chemical and mechanical stability, HPMA cryogels (Cgs) were also prepared using the cryotropic gelation technique by conducting the gelation reactions at subzero temperatures. The measurements of the equilibrium swelling degree and the elastic properties of poly(hydroxypropyl methacrylate) (PHPMA) gel samples having different initial monomer concentration were treated according to the scaling theory to explain the rubbery behavior of the resulting Hgs. The obtained scaling relation between the reduced modulus and the swelling degree Gr≈(Veq)−1.48 indicated limiting chain extensibility which is neglected in the Flory–Rehner theory. The effective crosslink density and polymer–solvent interaction parameter of PHPMA Hgs were used to interpret the observed deviation. Results showed that the properties of PHPMA Hgs and Cgs can be controlled by varying the HPMA and TEGDMA content. Increase of total monomer concentrations causes a pronounced decrease in the equilibrium swelling degree, and an increase in the elastic response of PHPMA Hgs and Cgs. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45889.

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Section: Resultsmentioning

confidence: 99%

Section: Influence Of the Monomer Concentration On Equilibrium Swellimentioning

confidence: 99%

Tunable elasticity and thermodynamic parameters of hydroxypropyl methacrylate‐based gels with varying extents of monomer concentration: Statistical mechanics treatments of physical observations

Orakdöğen

Sanay

2017

J of Applied Polymer Sci

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“…estimated that 95% of the PDBs underwent primary cyclization if the solid weight fraction was 5%. The primary cyclization is influenced by chain flexibility, primary chain length, and solvent quality, apart from the weight fraction of the monomer …”

Section: Resultsmentioning

confidence: 99%

“…Primary intramolecular cyclization is initiated by one double bond and one radical in a propagating chain, and it would result in a loop structure which does not contribute to the mechanical properties of the hydrogel . Primary intramolecular cyclization is independent of the crosslinking agent concentration but is dependent on the total monomer concentration …”

Section: Introductionmentioning

confidence: 99%

Kinetics and crystallization in pH‐sensitive free‐radical crosslinking polymerization of acrylic acid

Kim

Hong

Chang

2015

J of Applied Polymer Sci

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Free-radical crosslinking polymerization and crystallization of acrylic acid (AAc) were investigated by shear storage modulus (G 0 ) measurements in pH 2, as well as in pH 6 and pH 10, by varying the molar ratio of crosslinking agent (N,N 0 -methylene bisacrylamide; MBAAm) to AAc (0.583 3 10 23 , 1.169 3 10 23 , 1.753 3 10 23 , and 2.338 3 10 23 ). Our results showed that the pregelation time was the same at pH 2, regardless of the concentration of MBAAm. The propagation time was determined by the initial feed concentration of AAc, and the length of the linear curve in the propagation was proportional to the concentration of MBAAm. The Avrami exponent (n), as an indicative of growing pattern of an infinite molecule, in the crystallization was increased in proportional to the concentration of MBAAm, and generally low at pH 2. In the deceleration phase, n was observed near 1.0 throughout the all specimens. These results indicated that (1) the length of the pre-gelation period was determined by the ionization of AAc (or pH), (2) the polymerization rate of AAc was not affected by the concentration of MBAAm, and (3) the inhomogeneity of hydrogel was determined by the growing pattern of infinite molecule in propagation phase. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42195.

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“…For the synthesis of ion exchangers, the suspension copolymerization of acrylonitrile (AN) with crosslinking agents is widely used [2,3]. Acrylonitrile ionites are obtained with crossing it with hexamethylenedimetalacrylamide, diallylftalatte, divinylbenzene (DVB), N,N-methylene-bisacrylamide (MBA), hexagidro-1,3,5-triacrylotriazine (GTT), etc [4][5][6][7]. In the literature, many are described synthesis and study of acrylonitrile copolymers with various crosslinking agents, aimed at obtaining ion exchangers for various cations and anions [2, [8][9][10][11][12],…”

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confidence: 99%

Synthesis and Characterization of Granular Ion Exchangers Based on Acrylonitrile Copolymers

Tillayev

2021

Egypt. J. Chem.

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This work presents the results of the synthesis of granular copolymers of acrylonitrile with hexahydro-1,3,5-triacrylyltriazine and their modification with organic amines, in particular diethylamine, as well as a study of the physicochemical characteristics and sorption properties of the obtained ion exchangers. The result of the study was the synthesis of granular ion exchangers with the necessary physicochemical properties based on acrylonitrile and divinylbenzene, N,N´-methylene-bisacrylamide and hexahydro-1,3,5-triacrylyltriazine, the kinetics of this process was studied. The synthesized copolymers were modified with diethylamine, the physicochemical and ion-exchange properties of the obtained polymers were studied. It has been shown that acrylonitrile, its copolymers coated with divinylbenzene, N,N´-methylene-bis-acrylamide and hexahydro-1,3,5-triacrylyltriazine, as well as granular ion exchangers based on them, can be obtained. For the first time, copolymers of acrylonitrile and hexahydro-1,3,5-triacrylyltriazine with the necessary physicochemical characteristics were synthesized and, on their basis, conditions for obtaining weak anion-exchange resins on a complex basis were developed. The synthesized anion exchangers have complexing properties and can be used in the hydrometallurgy of non-ferrous and heavy metals, purification of waste water from toxic ions, separation and concentration of metal ions.

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Modeling of Acrylamide/N,N′-Methylenebisacrylamide Solution Copolymerization

Cited by 9 publications

References 50 publications

Tunable elasticity and thermodynamic parameters of hydroxypropyl methacrylate‐based gels with varying extents of monomer concentration: Statistical mechanics treatments of physical observations

Tunable elasticity and thermodynamic parameters of hydroxypropyl methacrylate‐based gels with varying extents of monomer concentration: Statistical mechanics treatments of physical observations

Kinetics and crystallization in pH‐sensitive free‐radical crosslinking polymerization of acrylic acid

Synthesis and Characterization of Granular Ion Exchangers Based on Acrylonitrile Copolymers

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