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    2014-7-11 · Lu J, Peng B, Li M Y, et al. Dispersion polymerization of anionic polyacrylamide in an aqueous salt medium. Petroleum Science. 2010. 7(3): 410–415. Article Google Scholar Lu X G, Liu J X, Wang R J, et al. Study of action mechanisms and properties of Cr 3+ cross-linked polymer solution with high salinity. Petroleum Science. 2012. 9(1): 75–81

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    2009-4-16 · illustrate the structure of hydrolyzed polyacrylamide and the definition of the degree of anionicity, respectively. (1) D A = 100 % × n (n + m) Download : Download full-size image; Fig. 1. Schematic structure of hydrolyzed polyacrylamide: the number of acrylamide units is m, while the number of acrylate units is n, with sodium cation as the counter-ion.

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    2020-8-29 · In order to obtain a new microblock structure in the anionic polymer chain, a template with controllable length is required as a matrix to arrange and assemble anionic monomers (Hamer et al. 2019; Zhang et al. 2011). In this study, polypropylene ammonium chloride (PAAC) was selected as the template, because the positively charged PAAC can adsorb and arrange anionic monomers easily on …

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    2021-6-20 · Full Article. Synthesis and Application of a Cationic Polyacrylamide Dry Strength Agent with Anionic Content. Guangyan Wang and Yi Jing* A new net-cationic polyacrylamide dry strength agent was synthesized through free radical polymerization using acrylamide (AM), itaconic acid (IA), N,N-dimethylacrylamide (F), and sodium methallyl sulfonate (T).

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    2018-9-7 · The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as …

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    2009-4-16 · Five commercial polyacrylamide samples of the Superfloc series were obtained from Cytec Canada Inc. Their trade names and charge densities, as given in a Cytec chemical handbook (Cytec, 2002), are listed in Table 1.Table 1 also shows the intrinsic viscosities in 0.5 mol NaCl solution at 25 °C, and viscosity-average molecular weights of the samples (Arinaitwe, 2008).

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    2013-12-24 · of nano-modified polyacrylamide prepared by simultaneous formation method was the best. When the con-tent of water glass and acrylamide (AM) were respectively 3% and 15%, reaction temperature was 60˚C and reaction time was 3 h, the performance of product was the best. The water content in filter cake was 24.32%

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  • UV-Initiated Polymerization of Cationic

    2013-12-24 · FTIR provided the support for the formation of P(AM-DAC-BA). In the dewatering experiments of the waste sludge, it presented a good sludge dewatering performance that, with 40 mg·L −1 P(AM-DAC-BA) at pH 7, the residual turbidity of supernatant and dry solid content were up to 38 NTU and 28.5%, respectively.

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    2017-8-11 · An anionic metal-organic framework with ternary building units for rapid and selective adsorption of dyes. Dalton Trans. 46 , 3332–3337 (2017). CAS Article PubMed Google Scholar

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    2011-4-10 · FTIR-ATR spectra were produced for an independent set of wood samples and used to predict the lignin or energy contents using the best models from table 1 and 2, respectively. Lignin and energy contents were determined by the acetyl bromide method and a …

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    2003-10-1 · FTIR spectroscopy was used to examine qualitative and quantitative changes in lignin and carbohydrate components relative to one another in wood decayed by a brown-rot and white-rots. C. puteana removed structural carbohydrate components selectively (with reduction of bands at 1738, 1375, 1158 and 898 cm −1 ) leaving elevated levels of the ...

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    2020-9-23 · S pettroscopia di assorbimento infrarosso (FTIR) La spettroscopia di assorbimento infrarosso - il cui acronimo FTIR deriva dall’inglese Fourier Transform Infrared Spectroscopy – è una tecnica analitica ampiamente impiegata per l’identificazione di materiali organici e, in alcuni casi, inorganici.La regione dello spettro infrarosso comprende i numeri d’onda1 nell’intervallo 14000-20 ...

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    2020-6-9 · Conversely, robust materials such as polyacrylamide are limited by potentially toxic monomers and adverse polymerisation conditions which compromise cell viability . One underexplored potential immobilisation material is a glycerol co-solvent polyvinyl-alcohol (PVA) cryogel.

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    2019-2-13 · The anionic nature of CABS displayed stability at different pH and temperatures and formed stable emulsions. Thin layer chromatography (TLC) and Fourier transform infrared spectroscopy (FTIR) revealed CABS as glycolipoprotein type. The Sodium Dodecyl Sulphate Polyacrylamide Gel Electrophoresis (SDS-PAGE) showed presence of multiple bands in a ...

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