Preparation of cationic polyacrylamide microsphere ...
2020-1-14 · viscosity of the cationic polyacrylamide emulsion decreased, while the apparent viscosity of the crude product increased when the PAETAC concentration …
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2020-1-14 · viscosity of the cationic polyacrylamide emulsion decreased, while the apparent viscosity of the crude product increased when the PAETAC concentration …
Get Price2017-6-24 · The viscosity of polyacrylamide aqueous solution is influenced by the solution viscosity, ph value, shear rate and the relative molecular polymer. Polyacrylamide solution viscosity and concentration are similar to the logarithmic relationship. High molecular weight polyacrylamide concentration is difficult to deal with when the concentration is ...
Get Pricewhere, μ is the viscosity (Pa.s), k is the flow consistency index (Pa.s n), n is the flow behavior index (unitless) and γ is the shear rate (1 sec). The concentration of the polymer has a pronounced effect on the apparent viscosity of the solution. With the increase in the concentration of polymer, the viscosity …
Get PriceLastly, the viscous modulus G ”. was dominant for the polymer solution with 5000 ppm, and its value (0.315 Pa) was, roundly, the double. of the elastic module G’ (0.154 Pa) within the Linear ...
Get Price2021-6-28 · The viscosity of polyacrylamide solution mainly reflects the internal frictional resistance between liquid molecules due to flow or relative movement. The internal frictional resistance is related to the structure of the polymer, the nature of the solvent, the concentration of the solution, temperature, pressure and other factors.
Get PriceThe amount of polymeric grafts depends on the quantity of anionic groups on fiber's surface and varies monotonically with the grafting temperature and polyacrylamide's concentration in the blend.
Get Price2017-8-27 · weight and concentration of stabilizer should be selected and optimized. In this paper, the optimum range for the intrinsic viscosity of stabilizer is 2.98-3.74 dL·g-1, in concentrations between 1.2-1.8 wt%. The extensibility of the stabilizer molecular chains is affected by the concentration of salt in the aqueous medium.
Get Price1999-3-1 · The extrapolated zero shear rate specific viscosity values for each concentration of the individual polymers were used to evaluate the intrinsic viscosities by the procedure developed by Huggins, (2) η sp /C=(η)[1+k H (η)C] where η sp is the shear corrected specific viscosity, k H is the Huggins constant and C is the polymer concentration in g dl −1.
Get Price2018-9-7 · High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity …
Get Price2021-5-20 · Factors influence the viscosity of polyacrylamide. Anionic polyacrylamide solution viscosity over prolonged hydrolysis time is changed, the hydrolysis time is short, a small viscosity, which may be due to polymer had a chance to form a network structure due; hydrolysis time is too long, the viscosity decreased, which is an anionic polymer release induced by acrylamide structure in solution.
Get PriceAbstract: In order to improve the aqueous solutions viscosity and flocculation performance of cationic polyacrylamide, organic montmorillonite was added into polymerization system of polyacrylamide, the cationic polyacrylamide/dimethyl diallyl ammonium chloride/organic montmorillonite (CPAM/DMDAAC/MMT) nanocomposite was prepared by aqueous two-phase polymerization method.
Get Price2021-6-28 · The viscosity of polyacrylamide solution mainly reflects the internal frictional resistance between liquid molecules due to flow or relative movement. The internal frictional resistance is related to the structure of the polymer, the nature of the solvent, the concentration of the solution, temperature, pressure and other factors.
Get Price2009-1-30 · Effect of photo-initiators concentration on the intrinsic viscosity. Polymerization conditions: terpolymer concentration 0.05 wt.%, pH = 3.0, initial temperature 6°C, monomers concentration 36 wt.%, cationic degree 12%, photo time 120 min
Get PriceBlufloc Polyacrylamide (PAM) Polyelectrolyte is water soluble polymer with Anionic, Cationic and Nonionic types. The range of molecular weight is different, Anionic is from 5-22 million, Cationic is from 5-12 million and Nonionic is from 5-12 million, with a charge density ranging from 0-60%.
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Get Price2015-06-01 16:40:08. Factors influence the viscosity of polyacrylamide. Anionic polyacrylamide solution viscosity reflects mainly due to internal friction between molecules of the liquid flow generated by the movement or relative. Friction within the structure of the polymer, the nature of the solvent, solution concentration and temperature and ...
Get Pricemonomers concentration 8~15%, PEG 20000 concentration 15~25%, and PDMC concentration 0.5~1.5%. Finally, the for-mation process of copolymer particles was investigated by optical microscope. Keywords: polymer synthesis, aqueous two-phase polymerization, cationic polyacrylamide, dimethylaminoethyl methacry-late methyl chloride, polyethylene ...
Get PriceCationic polyacrylamides modified with fluorinated methacrylate (FPAM) were prepared with acrylamide, dodecafluoroheptyl methacrylate (DFM) and methacryloxyethyl trimethylammonium chloride by free radical micellar copolymerization. The solution properties of FPAM were investigated. The results show that there are strong hydrophobic associations in the FPAM aqueous solution.
Get Price2019-12-12 · The interaction between cellulose fibers in the presence of cationic polyacrylamide (CPAM) was analyzed by rheology as a function of polyelectrolyte concentration, charge density, and molecular weight. CPAM was found to strongly influence the yield stress of cellulose suspensions; low doses of CPAM increased the yield stress, but at higher concentrations the yield stress declined. The charge ...
Get Price2021-5-20 · Factors influence the viscosity of polyacrylamide. Anionic polyacrylamide solution viscosity over prolonged hydrolysis time is changed, the hydrolysis time is short, a small viscosity, which may be due to polymer had a chance to form a network structure due; hydrolysis time is too long, the viscosity decreased, which is an anionic polymer release induced by acrylamide structure in solution.
Get Price2015-06-01 16:40:08. Factors influence the viscosity of polyacrylamide. Anionic polyacrylamide solution viscosity reflects mainly due to internal friction between molecules of the liquid flow generated by the movement or relative. Friction within the structure of the polymer, the nature of the solvent, solution concentration and temperature and ...
Get PriceCationic Polyacrylamide P(AM-DAC-BA) was synthesized by UV initiation, with acrylamide (AM), acryloyloxyethyl trimethyl ammonium chloride (DAC), butyl acrylate (BA) as the monomers. P(AM-DAC-BA). UV spectroscopy and infrared spectroscopy were employed to study the structural characteristics.
Get Price2018-2-22 · The results indicate that within a wide concentration range, the viscosity curves for these cationic microgels perfectly correspond to the Krieger–Dougherty model as modified by Tan et al. In particular, the specific volume in this model decreases at the critical overlapping concentration and reveals the interaction intensity between ...
Get PriceAbstract: In order to improve the aqueous solutions viscosity and flocculation performance of cationic polyacrylamide, organic montmorillonite was added into polymerization system of polyacrylamide, the cationic polyacrylamide/dimethyl diallyl ammonium chloride/organic montmorillonite (CPAM/DMDAAC/MMT) nanocomposite was prepared by aqueous two-phase polymerization method.
Get PriceCationic polyacrylamides modified with fluorinated methacrylate (FPAM) were prepared with acrylamide, dodecafluoroheptyl methacrylate (DFM) and methacryloxyethyl trimethylammonium chloride by free radical micellar copolymerization. The solution properties of FPAM were investigated. The results show that there are strong hydrophobic associations in the FPAM aqueous solution.
Get Price2017-3-15 · Another cationic polyacrylamide with intrinsic viscosity of 4.2 dL g −1 was synthesized in 120 min from aqueous photo-polymerization; a 200-W high-pressure mercury lamp was used in polymerization . Moreover, these studies also reported the improvement in …
Get Price2019-12-12 · The interaction between cellulose fibers in the presence of cationic polyacrylamide (CPAM) was analyzed by rheology as a function of polyelectrolyte concentration, charge density, and molecular weight. CPAM was found to strongly influence the yield stress of cellulose suspensions; low doses of CPAM increased the yield stress, but at higher concentrations the yield stress declined. The charge ...
Get Price2018-9-7 · High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity …
Get Price2018-6-10 · The particle size of the synthesized amphoteric polyacrylamide (AmPAM) ranged from 1 to 8μm and the intrinsic viscosity ranged from 5.6 to 14.2dL/g. The influences of aqueous solution of AS concentration, stabi-lizer concentration, initiator concentration, monomer concentration on the conversion of monomer, the intrinsic viscosity,
Get Price2021-5-20 · Factors influence the viscosity of polyacrylamide. Anionic polyacrylamide solution viscosity over prolonged hydrolysis time is changed, the hydrolysis time is short, a small viscosity, which may be due to polymer had a chance to form a network structure due; hydrolysis time is too long, the viscosity decreased, which is an anionic polymer release induced by acrylamide structure in solution.
Get Price2015-06-01 16:40:08. Factors influence the viscosity of polyacrylamide. Anionic polyacrylamide solution viscosity reflects mainly due to internal friction between molecules of the liquid flow generated by the movement or relative. Friction within the structure of the polymer, the nature of the solvent, solution concentration and temperature and ...
Get PriceUV-Initiated polymerization of cationic polyacrylamide: synthesis, characterization, and sludge dewatering performance ... and photoinitiator concentration on the intrinsic viscosity [η] of P(AM-DAC-BA) were investigated. RSM model based on the influencing data was established for optimizing synthetic conditions. It was found that, at light ...
Get Price2018-2-22 · The results indicate that within a wide concentration range, the viscosity curves for these cationic microgels perfectly correspond to the Krieger–Dougherty model as modified by Tan et al. In particular, the specific volume in this model decreases at the critical overlapping concentration and reveals the interaction intensity between ...
Get Price2003-2-20 · the viscosity, which is expected to be small but significant for high-molecular-weight polymers such as those used in this work. In distilled water, the Mark-Houwink viscosity parameters for polyacrylamide are K - 6.31 X 103 dl/g and a = 0.8 at 30°C.27 Similar parameters are not available for the acrylamide co-polymers.
Get Price2018-11-29 · various parameters on intrinsic viscosity, conversion, and dissolvability. Results showed that the best performance was obtained at indices of 0.45 wt‰ redox initiator concentration, 0.2 wt‰ azo initiator concentration, 40.0 wt% cationic monomer, 3 wt‰ urea, and first- and second-stage light intensities of 8.5 and 13 mW/cm2, respectively ...
Get Price2018-6-10 · The particle size of the synthesized amphoteric polyacrylamide (AmPAM) ranged from 1 to 8μm and the intrinsic viscosity ranged from 5.6 to 14.2dL/g. The influences of aqueous solution of AS concentration, stabi-lizer concentration, initiator concentration, monomer concentration on the conversion of monomer, the intrinsic viscosity,
Get PriceCationic polyacrylamide is a type of water-soluble, macromolecule polyelectrolyte.Its molecular chain has cationic groups and active adsorption groups. Through charge neutralization and adsorptive bridging, it can lower the ζ electric potential in the water and give rise to unstability and flocculation to the suspended particles in water and ...
Get PriceA well treating fluid useful in slickwater fracturing processes contains polyacrylamide friction reducer and a viscosity breaker capable of reducing the viscosity of the well treating fluid to about the viscosity of water at ambient temperatures of typical underground formations. The viscosity breaker is selected from the group consisting of hydrogen peroxide, calcium peroxide, magnesium ...
Get Price2020-7-11 · COMMERCIAL Polyacrylamides Major manufacturers of acrylamide polymers are BASF, SNF Floerger, Shangdong Tongli , and Kemira. Applications. Poly(acrylamide-co-acrylic acid) and its sodium salts (APAM) are widely used as thickening agent, binder, super absorbent, soil conditioner, filtering aid, flocculating agent, crosslinker, suspending agent, lubricant, and oil recovery agent.
Get Price2017-1-1 · The cationic polyacrylamide (CPAM) with a molecular weight of 18 million exhibited good flocculation and sedimentation after a series of flocculant selection tests. ... .sub.0] is the yield stress in Pa; [eta] is the apparent viscosity in Pa-s; and n is the flow index, n < 1. ... Mines name and Application Tailings Capacity locations ...
Get PriceCopper electrodeposition in the presence of guar or activated polyacrylamide . 75 1 0 1 0
Get Price2021-3-25 · Sludges, particularly clay-enriched fluid tailings, are major waste streams disposed from mining and mineral processing industries. To improve the separation of sludges into water and stackable solids, a novel flocculant was developed in this study using peptides from specified risk materials (SRMs), a proteinaceous waste from animal rendering industries; the synthesis was accomplished with ...
Get PriceAkzoNobel Surface Chemistry Cationic Surfactant Thickeners Natural polymers (xanthan gum guar gum) are not stable at extreme pHs. Hydrochloric acid 37 10 10 10 10 25.6 25.6 25.6 Ethomeen O/12 1.5 1.5 3 Ethomeen T/12 2 1 1.5 420 480 320 300 630 700 1500 Strong acids Alkaline and bleaching agents Typical procedure for using cationic surfactant ...
Get Price2005-8-23 · 1. A method of electrowinning or electrorefining copper from a copper electrolyte solution which contains chloride ions, the method comprising: forming a polyacrylamide solution by dissolving polyacrylamide, having a molecular weight range of 5,000 to 20,000,000 Daltons, in an acidic medium and under conditions to form a polyacrylamide block copolymer having blocks of carboxyl groups …
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Get PriceEffect of Milk Concentration on Heat-Induced, pH-Dependent Dissociation of Casein from Micelles in Reconstituted Skim Milk at Temperatures between 20 and 120 °C. Skelte G. Anema. Journal of Agricultural and Food Chemistry 1998, 46, 6, 2299-2305 (Article) Publication Date …
Get PriceMaster Thesis Collection. EMerald programme students have developed a wide range of theses that cover a broad spectrum of the resources engineering field. Our students aim to expand research and innovation in the field and explore sustainability applications in the wider industry. Please find a selection of all of our cohorts' theses below.
Get PricePaper industry in polyacrylamide dispersing agent is composed of cationic polyacrylamide with low relative molecular weight, due to its molecular chain containing carboxyl and on electronegative fiber with dispersion effect, can improve the viscosity of pulp, is conducive to the fiber suspension and effectively improve the sheet uniformity is a long fiber of high efficient dispersant.
Get PriceSolution properties of Cationic Polyacrylamide Modified with Fluorinated . ... The apparent viscosity of FPAM solution increases with increasing the FPAM concentration both in water and salt solution. There are maximum values of the apparent viscosity of FPAM with addition of sodium chloride, CTAB and sodium dodecyl sulfate (SDS), respectively.
Get Price2015-4-11 · The basic principle of profile control and water shutoff is: adding cross-linking agent of polyacrylamide solution in certain concentration, the high valence metal ion crosslinking agent in the polynuclear olation complex ion form and polyacrylamide amide carboxyl groups or the formation of …
Get Price2014-5-1 · Cationic Polyacrylamide P(AM-DAC-BA) was synthesized by UV initiation, with acrylamide (AM), acryloyloxyethyl trimethyl ammonium chloride (DAC), butyl acrylate (BA) as the monomers. P(AM-DAC-BA). UV spectroscopy and infrared spectroscopy were employed to …
Get Pricewith increasing polyacrylamide concentration, showing the formation of more larger, denser flocs. Final sediment height tends to decrease with an increase in polyacrylamide concentration, indicating denser particle associations (face-to-face) and verified with scanning electron microscopy.
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Get Price2018-6-17 · Low concentration (1–6 mol%) of cationic monomer from each group were copolymerized with acrylamide to obtain hydrophobically modified cationic polyacrylamide. Results show that the intrinsic viscosity and molecular weight of the copolymers decreases with the concentration of the hydrophobic cationic group, whereas charge density indicates ...
Get Price2020-5-1 · Floerger (Andrézieux, France). The concentration of the polymers was fixed at 2500 ppm. The cationic polyacrylamide (FO 4290 SSH) was used with di erent concentrations of newly synthesized cationic gemini surfactants for rheological measurements. The seawater used …
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Get PriceFlocculation polyacrylamide solution viscosity and it has a direct relationship, in general, the higher the viscosity of the person the better the performance, that is to say the higher the molecular weight polyacrylamide superior product performance; if it is subject to certain viscosity influencing factors and reduced flocculation performance is bound to decline.
Get Price2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils. To obtain detailed information on the polymer’s fate in the soil compartment, the degradation of 14C …
Get PriceSolution properties of Cationic Polyacrylamide Modified with Fluorinated . ... The apparent viscosity of FPAM solution increases with increasing the FPAM concentration both in water and salt solution. There are maximum values of the apparent viscosity of FPAM with addition of sodium chloride, CTAB and sodium dodecyl sulfate (SDS), respectively.
Get PriceCationic polyacrylamide can be used in industrial waste water treatment and municipal sewage treatment. It is generally suggested that low or medium ion degree and medium or high molecular weight products be applicable to industrial waste water treatment or the mixture of industrial and municipal waste water treatment, medium or high ion degree ...
Get Price2017-9-26 · not appear to be stirring due to high viscosity, try a lower concentration of polymer, but in no case should the concentration be reduced to below 0.25% or poor dissolutionmay result. If mixing remains inadequate, add larger impellers (or more impellers) to the mixing shaft and increase the horsepower of the mixer, if necessary.
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Get PriceHigh quality Zetag 8165 Equivalent Polyacrylamide Cationic Water Treatment High Cationic Charge from China, China's leading cationic pam product, with strict quality control cationic polyelectrolyte flocculants factories, producing high quality cationic polyelectrolyte flocculants products.
Get Price2020-7-11 · COMMERCIAL Polyacrylamides Major manufacturers of acrylamide polymers are BASF, SNF Floerger, Shangdong Tongli , and Kemira. Applications. Poly(acrylamide-co-acrylic acid) and its sodium salts (APAM) are widely used as thickening agent, binder, super absorbent, soil conditioner, filtering aid, flocculating agent, crosslinker, suspending agent, lubricant, and oil recovery agent.
Get Price2010-4-22 · molecular mass nonionic polyacrylamide (N-PAM) and a low mo-lecular mass nonionic polyacrylamide (n-PAM). Polyacrylamides concentrations of 0, 20, 80,120, 240, 500 mg/L were used to observe a change in behavior. The concentration range was selected based on calculated estimatesof the influence of cationic PAM on the kaolinite
Get Price2011-1-20 · The hydrophobically associating cationic fluorinated polyacrylamide (CFPAM), modified with fluorinated acrylate, 2-(perfluorooctyl)ethyl acrylate (FEA), has been newly synthesized, by free radical micellar copolymerization in aqueous solution. The solution properties of these polymers were investigated in details in this study. In addition, the flocculation of CFPAM was also evaluated. The ...
Get Price2008-6-13 · The exemplified glyoxalated polyacrylamide products in U.S. Pat. No. 4,605,702 have a concentration of about 20% by weight cationic monomer, but were indicated as being used in much higher dosages to compare wet strength properties with exemplified products in U.S. Pat. No. 3,556,932.
Get Price2021-4-7 · The viscosity of polyacrylamide solution mainly reflects the internal frictional resistance between liquid molecules due to flow or relative movement. The internal friction resistance is related to the structure of the polymer, the nature of the solvent, the concentration of the solution, temperature and pressure and other factors.
Get Price2021-7-6 · Cationic polyacrylamide (CPAM) and cationic starch have been used as dry strength agents for many years in papermaking. However, CPAM is more suitable than cationic starch due to its lower required dosage. Recently, amphoteric polyacrylamide (AmPAM) has been used as a dry strength agent in the paper industry and other fields.
Get Price1. Configuration concentration The molecular weight and viscosity of anionic polyacrylamide pam are high, so the ratio concentration is generally between 0.1% to 0.5%, and the solution rati...
Get Price2017-11-3 · The cellulose viscosity was determined according to Tappi T 230 om-94 in cupriethylenediamine (CED) solution at 0.5% cellulose concentration. All measurement were s carried out in duplicates, and the average was reported. S10 or S18 of pulp samples were determined according to TAPPI T 235 cm-00 using sodium hydroxide solution of
Get Price2016-7-20 · The lower effectiveness· of. polyacrylamide is be cause in this case the flocculation takes. place lJl8inly by the bridging mechanism where sus pended particles come together to form a network called floc while in AAM-DADMAC copolymer, the cationic charge density neutralizes the nega tively charged suspended particles and initiate
Get Price2012-7-22 · Polyacrylamide Emulsions Handbook 2-2 Storage and handling of emulsions : basic principles Emulsions must be stored inside a building at a constant temperature between 5°C and 30°C. During the storage and handling, the emulsion must not be contaminated by water.
Get Price2019-12-31 · CATIONIC POLYACRYLAMIDES Copolymers of acrylamide and of a chloromethylated monomer 1.1.3. Use and dosage : Coagulants are used after dilution. The rate of dilution will depend directly on the parameters of the solution to be treated (concentration, viscosity, …) and on the application equipment (pump, flow, …).
Get Price2008-6-13 · The exemplified glyoxalated polyacrylamide products in U.S. Pat. No. 4,605,702 have a concentration of about 20% by weight cationic monomer, but were indicated as being used in much higher dosages to compare wet strength properties with exemplified products in U.S. Pat. No. 3,556,932.
Get PriceGenerally, the higher the molecular weight, the higher the concentration necessary. Copolymers also generally require a higher concentration than homopolymers to obtain a similar reduction in viscosity. Copolymers of cationic monomer and non-ionic monomer (preferably less than 50 mole percent non-ionic component) may also be used.
Get Price2019-9-4 · 1 Article 2 Production of Cationic Polyacrylamide Flocculant 3 P(AM–DMDAAC) by Microwave Assisted Synthesis, 4 its Characterization and Flocculation Perfomance 5 Peng Zhang*, Dongqin Zhao, Xue Zhang 6 School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, China2 7 Affiliation 2; [email protected] 8 * Correspondence: [email protected]; …
Get PriceSolutions of ionic polyacrylamide polymers behave pseudoplastic in purely viscometric flow. Flow rate, polymer molecular weight and electrolytes affect solution viscosities to a large extent. Equations are given for the viscosity-shear rate relations in a form that can be used conveniently to account for the effect of viscosity on mobility.
Get PriceThe viscosity of the polyacrylamide solution is related to its molecular weight and preparation concentration. Solubility: The flocculation function can be fully exerted only when it is dissolved well. Sometimes it is necessary to speed up the dissolution rate, then consider increasing the concentration of the polyacrylamide solution. 3.
Get Price2012-7-22 · Polyacrylamide Emulsions Handbook 2-2 Storage and handling of emulsions : basic principles Emulsions must be stored inside a building at a constant temperature between 5°C and 30°C. During the storage and handling, the emulsion must not be contaminated by water.
Get Price3·Polyacrylamide has good thermal stability and is easily soluble in cold water. The viscosity and concentration of its aqueous solution approximate a logarithmic relationship (that is, a linear relationship). Acrylamide (PAM) has a very high viscosity, and its aqueous solution has a …
Get Price2014-6-27 · Two-stage mixing significant increase in polymer solution viscosity Polymer Mixing unit Conc. % Viscosity cP Anionic 1-stage 2-stage 0.50 226 310 Cationic 1-stage 2-stage 0.50 427 523 Nonionic 1-stage 2-stage 0.50 156 178 (27% ) (18% ) (12% )
Get Price2014-6-24 · The intrinsic viscosity is the limit of the inherent viscosity when polymer concentration tends to zero. According to Sorbie (1991), the intrinsic viscosity can be used to estimate the molecular weight of the polymer by Mark-Houwink equation (Eq. 1): ( more …
Get Pricedetermination of PAM concentration in soil water (e.g., runoff water, groundwater, soil solution) has also become increasingly important to better understand the fate and transport of PAM in the environment (Lu and Wu, 2003). Polyacrylamide is a broad class of synthetic organic polymers formed by the polymerization of acrylamide (AMD) units,
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