Poly acrylamide-co-sodium

In this experiment, crosslinked poly(acrylamide-co-sodium methacrylate) (0.5-5.0mol% sodium methacrylate) gel cylinders of different radii in the... 

Fig. 8, Examples of a least squares fit of a shrinking core model to measurements of moving ion exchange fronts which develop within the acidic form of poly(acrylamide-co-sodium methacrylate) gel cylinders of different radii when immersed in pH 12 NaOH solution. Legend All gels were made from a solution containing 1 mol % of solution methacrylate A = 1.8 mm radius B = 2.8 mm C = 4.2 mm D = 6.4 mm. Reprinted with permission from [127]. Copyright [1992] American Chemical Society...

To dearly distinguish between these two modes of solvent penetration of the gel, we immersed poly(acrylamide-co-sodium methacrylate) gels swollen with water and equilibrated with either pH 4.0 HQ or pH 9.2 NaOH solution into limited volumes of solutions of 10 wt % deuterium oxide (DzO) in water at the same pHs. By measuring the decline in density of the solution with time using a densitometer, we extracted the diffusion coefficient of D20 into the gel using a least squares curve fit of the exact solution for this diffusion problem to the data [121,149]. The curve fit in each case was excellent, and the diffusion coefficients obtained were 2.3 x 10 5cm2/s into the ionized pH 9.2 gel and 2.4 x 10 5 cm2/s into the nonionized pH 4.0 gel. These compare favorably with the self diffusion coefficient of D20, which is 2.6 x 10 5 cm2/s, since the presence of the polymer can be expected to reduce the diffusion coefficient about 10% in these cases [150], In short, these experiments show that individual solvent molecules can rapidly redistribute between the solution and the gel by a Fickian diffusion process with diffusion coefficients slightly less than in the free solution. 

Poly(acrylamide-co-sodium aciylate) polystyrenesulfonate and water 2003HEL... 

Poly(acrylamide-co-sodium acrylate) Poly (3 -aery lamido-3 -deoxy-1,2 5,6-di-O-isopropylidene- 218... 

Klein, J. Conrad, K.-D. Molecular weight determination of poly(acrylamide) and poly(acrylamide-co-sodium acrylate). Makromol. Chemie 179 (1978) 1635 - 1638 Kulicke, W.-M. Horl, H.-H. Preparation and characterization of a series of poly(acrylamide-co-acrylates), with a copolymer composition between 0-96.3 mol t acrylate units with the same degree and distribution of polymerization. Coll. Polym. Sci. (submitted) 1-30... 

Kationic and anionic derivatives of PAAm also exhibit the aging effect. The examples are poly(acrylamide-co-methacryloyloxyethyl-N,N,N,-trimethyl-ammoniumchlorid) and Poly(acrylamide-co-sodium-2 sulfoethylmethacry-lathes) as well as poly(acrylamide-co-sodium-2-acrylamido-2-methylpropane-... 

Nevertheless, if the oilfield can be preflushed by fresh water, satisfactory results can be obtained with hydrolyzed polyacrylamides. On the other hand, poly(acrylamide-co-sodium-2-sulfoethyl-methacrylate)... 

Random copolymer synthesis Poly(acrylamide-co-sodium acrylates) (1) were prepared (reaction 5) by ammonium persulfate initiation in distilled water at a 10% monomers concentration at 25°C. The copolymers were isolated by precipitation into methanol, followed by freeze drying. The reactivity ratios were determined and the predicted copolymer composition was in excellent agreement with that experimentally determined by the micro Kjeldahl nitrogen analysis. Molar feed ratios of acrylamide to sodium acrylate varied from 96/4 to 55/45. 

Additional aging effects could be found for graft copolymers (starch-acrylamide copolymers [36], synthetic amylose [36],poly(acrylamide-co-methacryloxyethyl-N,N,N,-trimethylammoniumchloride) PAAm/M [30] and poly(acrylamide-co-sodium-2-sulfoethylmethacrylate) [37]. 

Chemical Name Poly(acrylamide-co-sodium acrylate)... 

Murthy, P. S. K. Mohan, Y. M. Sreeramulu, J. Raju, K. M. Semi-IPNs of starch and poly(acrylamide-co-sodium methacrylate) Preparation, swelling and diffusion characteristics evaluation. React. Eunct. Polym. 66 1482-1493 (2006). 

The terminology used to describe acrylamide-containing polymers in the technical literature varies in its precision. In order to avoid confusion, throughout this article the term poly(acrylamide) is reserved for the nonionic homopolymer of acrylamide, whereas the term polyacrylamides or acrylamide polymers refers to acrylamide-containing polymers, including the homopolymer and copolymers. Specific nomenclature is used for particular copolymers, for example, poly(acrylamide-co-sodium acrylate). 

Phosphonomethylated derivative of PEI Poly(acrylamide-co-sodium acrylate) Polyelectrolyte-surfactant complex PoIy(styrene sulfonate)... 

McCarthy KJ, Burkhardt CW, Parazak DP. Mark-Houwink-Sakurada constants and dilute solution behavior of heterodis-perse poly(acrylamide-co-sodium acrylate) in 0.5 M and 1M NaCl. J Appl Polym Sei 1987 33 1699-1714. 

Liu, Z.Q., Yang, Z.P., Luo, Y.L., 2012c. Swelling, pH sensitivity, and mechanical properties of poly(acrylamide-co-sodium methacrylate) nanocomposite hydrogels impregnated with carboxyl-functionalized carbon nanotubes. Polymer Composite 33, 665—674. 

Poly(acrylamide-co-sodium-2-(acrylamido)-2-methylpropanesulfoiiaee-co-(2-(acrylamido)-2-methylpropyl)trimethyl ammonium chloride) ... 

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