the scaling exponents of polyacrylamide and acrylamide-sodium

the scaling exponents of polyacrylamide and acrylamide‐sodium

The scaling exponents of polyacrylamide and acrylamide‐sodium

The ratio of bulk modulus to shear modulus, K e /G e, of polyacrylamide (PAAM) gels was studied. This ratio is directly related to a scaling exponent, δ, which is related to the concentration dependence of both bulk modulus and shear modulus.

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the scaling exponents of polyacrylamide and acrylamide-sodium

The scaling exponents of polyacrylamide and acrylamide-sodium

The ratio of bulk modulus to shear modulus, K e /G e , of polyacrylamide (PAAM) gels was studied. This ratio is directly related to a scaling exponent, δ, which is related to the concentration dependence of both bulk modulus and shear modulus. It was found that δ depends on the details of chemical ingredients and process.

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(pdf) phase transition in swollen gels - 19. effect of the

(PDF) Phase transition in swollen gels - 19. Effect of the

The scaling exponents of polyacrylamide and acrylamide-sodium acrylate copolymer gels. behavior of acrylamide/sodium acrylate gel was found to be dramatically different from the nonionic gels

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elastic, superporous hydrogel hybrids of polyacrylamide and

Elastic, Superporous Hydrogel Hybrids of Polyacrylamide and

treatment step, a semi-interpenetrated network of sodium alginate-polyacrylamide was similarly prepared and used as control. Results and Discussion The non-treated, semi-interpenetrated network of poly-acrylamide-sodium alginate swelled to about 100 g g 1 of the active swellable material and was mechanically very weak in its fully-swollen state

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acrylamide and polyacrylamide - markit

ACRYLAMIDE AND POLYACRYLAMIDE - Markit

ACRYLAMIDE AND POLYACRYLAMIDE by YEN-CHEN YEN e Copolymerization of Acrylamide and Sodium Acrylate in Emulsion .. 207 209 209 211 214 216 216 216

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a novel method to make viscoelastic polyacrylamide gels for

A novel method to make viscoelastic polyacrylamide gels for

PAA viscoelastic gels are made by cross-linking acrylamide and bis-acrylamide in the presence of long linear polymers of polyacrylamide. 16 16. E. E. Charrier, K. Pogoda, R. G. Wells, and P. A. Janmey, “ Control of cell morphology and differentiation by substrates with independently tunable elasticity and viscous dissipation ,” Nat. Commun.

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[pdf] alkaline hydrolysis of polyacrylamide and study on poly

[PDF] Alkaline Hydrolysis of Polyacrylamide and Study on Poly

Polyacrylamide is prepared by free radical polymerization mechanism in aqueous solution, using ammonium persulphate as initiator . Poly(acryl- amide-co-sodium acrylate) or partially hydrolyzed polyacrylamide (PI-IPA) with different degrees of hydrolysis was obtained by alkaline hydrolysis of polyacrylamide using sodium hydroxide as hydrolyzing agent .

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interactions between inorganic salts and polyacrylamide in

Interactions between inorganic salts and polyacrylamide in

The osmotic pressure of PAAm in all examined salt solutions followed the scaling theory, with an exponent of 2.3 ± 0.1. In solutions of a sodium halide series, the value of the pre-exponential factor seemed to depend on salt concentration, anion radius, and the apparent “anionic-portion radius” of the water molecule.

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scaling analysis of surfactant templated polyacrylamide gel

Scaling Analysis of Surfactant Templated Polyacrylamide Gel

Surfaces of surfactant-templated polyacrylamide hydrogels were imaged by atomic force microscopy (AFM), and the surface morphology was studied by numerical scaling analysis. The templated gels were formed by polymerizing acrylamide plus a cross-linker in the presence of surfactants, which were then removed by soaking in distilled water. Gels formed in the presence of over 20% surfactant (by

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universal viscosifying behavior of acrylamide-based polymers

Universal viscosifying behavior of acrylamide-based polymers

For the good solvent case, the power exponents are evaluated for υ = 0.588 and also for υ = 0.579, which is the scaling exponent found by Wu et al. [ 19 19. Wu, X. Y., D. Hunkeler, A. E. Hamielec, R. H. Pelton, and D. R. Woods, “ Molecular weight characterization of poly (acrylamide-co-sodium acrylate).

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studies on mechanical and swelling behavior of polymer

Studies on mechanical and swelling behavior of polymer

Scaling behavior: Effect of precursor concentration and precursor molecular weight on the modulus and swelling of polymeric networks. Journal of Rheology 2000 , 44 (4) , 897-915.

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interactions between inorganic salts and polyacrylamide in

Interactions between inorganic salts and polyacrylamide in

The osmotic pressure of PAAm in all examined salt solutions followed the scaling theory, with an exponent of 2.3 ± 0.1. In solutions of a sodium halide series, the value of the pre-exponential factor seemed to depend on salt concentration, anion radius, and the apparent “anionic-portion radius” of the water molecule.

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development of acrylamide polymers for the treatment of waste

Development of acrylamide polymers for the treatment of waste

methacrylate, vinyl acetate [115, 116], acrylamide– sodium acrylate [57, 117], and acrylamide– diallylethylamine hydrochloride [118], the decrease inktoccurred ”rstbutkpalso dropped after 50% conversion. Accordingly, the ratio of the rate constantskp=k0:5 t increases [102].

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wo1997029136a1 - processes for the production of

WO1997029136A1 - Processes for the production of

Processes are provided for production of substantially dry polyacrylamide powder in which levels of residual acrylamide monomer are significantly reduced. These processes are particularly suitable for use on an industrial or plant scale.

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solution properties and electrospinning of polyacrylamide and

Solution properties and electrospinning of polyacrylamide and

The key to achieve electrospinning easiness and defect-free fibers for biopolymers mainly lies in the tune of solution properties. In this work, we uncovered the tunable effects of ε-polylysine (ePL, M w ~4000 g/mol) on improving electrospinning easiness and harvesting defect-free fiber for ultra-high molecular-weight polyacrylamide (PAAm, M w ~4,000,000 g/mol) by characterizing solutions

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modeling and investigation of the swelling kinetics of

Modeling and Investigation of the Swelling Kinetics of

The acrylamide-sodium acrylate hydrogel was synthesized by free radical polymerization of the method of solution polymerization. Dynamic swelling tests were conducted at 25, 40, and 60°C temperatures, in order to investigate the swelling properties of the synthesized hydrogel. The results have shown that swelling content and swelling rate of the hydrogel increase with increasing the swelling

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universal viscosifying behavior of acrylamide-based polymers

Universal viscosifying behavior of acrylamide-based polymers

For the good solvent case, the power exponents are evaluated for υ = 0.588 and also for υ = 0.579, which is the scaling exponent found by Wu et al. [ 19 19. Wu, X. Y., D. Hunkeler, A. E. Hamielec, R. H. Pelton, and D. R. Woods, “ Molecular weight characterization of poly (acrylamide-co-sodium acrylate).

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the chain conformation, relaxation dynamics and

The chain conformation, relaxation dynamics and

The scaling exponents in these two regions display different values marked with numbers, and the values are listed in Table 2, together with those predicted from the scaling approach. Download : Download high-res image (198KB) Download : Download full-size image; Fig. 5.

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studies on mechanical and swelling behavior of polymer

Studies on mechanical and swelling behavior of polymer

Scaling behavior: Effect of precursor concentration and precursor molecular weight on the modulus and swelling of polymeric networks. Journal of Rheology 2000 , 44 (4) , 897-915.

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solid‐state polymerization of acrylamide and some acrylates

Solid‐state polymerization of acrylamide and some acrylates

Ulku Ramelow, Bahattin Baysal, E.s.r. study of the reaction of gases with the free radicals produced by u.v. radiation on the surfaces of acrylamide and some crystalline materials: 2. Results of H2, SO2 and CI2 admission to acrylamide, propionamide, methacrylamide and polyacrylamide, Polymer, 10.1016/0032-3861(87)90170-4, 28, 6, (961-968), (1987).

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synthesis of graft polyacrylamide with responsive self

Synthesis of graft polyacrylamide with responsive self

As shown in Fig. 6, the rheological behaviour of 1-PAMH-g-PNIPA(60) in aqueous solution follows the theoretical predictions with scaling exponent of 0.5 and 1.3 in the unentangled and entangled regimes, respectively. We can mention that the lower value obtained in the entangled regime mainly comes from the small number of data in this range.

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interactions between inorganic salts and polyacrylamide in

Interactions between inorganic salts and polyacrylamide in

The osmotic pressure of PAAm in all examined salt solutions followed the scaling theory, with an exponent of 2.3 ± 0.1. In solutions of a sodium halide series, the value of the pre‐exponential factor seemed to depend on salt concentration, anion radius, and the apparent “anionic‐portion radius” of the water molecule.

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swelling degree and diffusion parameters of poly(sodium

Swelling Degree and Diffusion Parameters of Poly(Sodium

hydrogels. As can be seen in Figure 1a, the presence of units of Sodium Acrylate (SA) monomer in the (AAm-co-SA) hydrogel led to an expressive increase in the swelling ratio when it is compared with Polyacrylamide hydrogel (AAm-co-0) without SA. As shown in Table 2, the result of maximum swelling ratio W∞ increased from 22.8 to 108.5.

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polyacrylamide pam flocculant for water treatment - chemate

Polyacrylamide PAM Flocculant for Water Treatment - Chemate

Polyacrylamide(PAM) is a water-soluble linear high-molecular polymer formed by the polymerization of acrylamide monomers initiated by free radicals. At the same time, it is also a kind of polymer water treatment flocculant, which can absorb suspended particles in the water and act as a bridge between the particles, so that the fine particles

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