alkaline hydrolysis of polyacrylamide and study on poly

Alkaline Hydrolysis of Polyacrylamide and Study on Poly

Alkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties Mohammad Ebrahim Zeynali* and Ahmad Rabbii Department of Adhesives and Resins. Iran Polymer and Petrochemical Institute, P .O.Box: 149651115, Tehran, I .R. Iran Received 22 January 2002 ; accepted 09 June 2002 ABSTRACT Polyacrylamide is prepared by

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alkaline hydrolysis of polyacrylamide and study on poly

Alkaline hydrolysis of polyacrylamide and study on poly

Abstract. 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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alkaline hydrolysis of polyacrylamide and study on poly

Alkaline Hydrolysis of Polyacrylamide and Study on Poly

Alkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties Article in Iranian Polymer Journal 11(4) · July 2002 with 321 Reads How we measure 'reads'

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alkaline hydrolysis of polyacrylamide and study on poly

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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study on alkaline hydrolysis of polyacrylamide by 13 c nmr

Study on Alkaline Hydrolysis of Polyacrylamide by 13 C NMR

Alkaline hydrolysis of a polyacrylamide sample was performed in aqueous sodium hydroxide (NaOH) solutions at various NaOH concentrations to investigate the effects of hydrolysis conditions on the

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alkaline hydrolysis of polyacrylamide | springerlink

Alkaline Hydrolysis of Polyacrylamide | SpringerLink

Specific features of the hydrolysis of polyacrylamide and its derivatives under various conditions are characterized. The most efficient procedures for performing hydrolysis in dilute and concentrated aqueous solutions and suspensions, as well as during acrylamide polymerization in aqueous solutions and emulsions, are discussed.

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alkaline and acid hydrolysis of polyvinylamides - moens

Alkaline and acid hydrolysis of polyvinylamides - Moens

Abstract. The alkaline and acid hydrolyses of polyvinylamides and their N-substitution derivatives have been studied and compared to the alkaline and acid hydrolyses of simple homologous substances.The rates of reaction have been followed conductometrically, and the rate constants evaluated at different temperatures in order to determine the energies of activation and the log PZ of the

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synthesis of partially hydrolyzed polyacrylamide

Synthesis of partially hydrolyzed polyacrylamide

Alkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties July 2002 · Iranian Polymer Journal Mohammad Ebrahim Zeynali

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investigation of polyacrylamide based hydroxide ion

Investigation of polyacrylamide based hydroxide ion

Investigation of polyacrylamide based hydroxide ion-conducting electrolyte and its application in all-solid electrochemical capacitors†. Jak Li a, Jinli Qiao b and Keryn Lian * a a Flexible Electronics and Energy Laboratory, Department of Material Science and Engineering, University of Toronto, 184 College St., Toronto, ON, Canada M5S 3E4.

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chemical stability limits of water-soluble polymers used

Chemical Stability Limits of Water-Soluble Polymers Used

Summary. This work describes long-term thermal stability limits of water-soluble polymers under anaerobic conditions. Polymers investigated included polyacrylamide, xanthan, scleroglucan, cellulose sulfate, and a heteropolysaccharide of unknown stru

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polymers | free full-text | effect of aging, antioxidant

Polymers | Free Full-Text | Effect of Aging, Antioxidant

As an improvement, partially hydrolyzed polyacrylamide (HPAM) was suggested, by converting some of the amide group on the polyacrylamide (PAM) to the carboxylate group during the hydrolysis process [], see Figure 1.Electrostatic repulsion caused by negative charges of the carboxylate groups distributed along the polymer chain helps the polymer to be uncoiled easily and therefore provides

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using cationic polymers to improve alkenyl succinic

Using cationic polymers to improve alkenyl succinic

In this study, the effect of using cationic polymers such as poly-aluminum chloride (PAC), polyethylenimine (PEI), cationic polyacrylamide (CPAM), and poly-(diallyldimethylammonium chloride) (PDADMAC) on Alkenyl Succinic Anhydride (ASA) sizing efficiency in HYP-containing pulp furnish was investigated.

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novel ph-sensitive interpenetrating network hydrogel beads

Novel pH-Sensitive Interpenetrating Network Hydrogel Beads

EBSCOhost serves thousands of libraries with premium essays, articles and other content including Novel pH-Sensitive Interpenetrating Network Hydrogel Beads of Carboxymethylcellulose--(Polyacrylamide-Grafted-Alginate) for Controlled Release of Ketoprofen: Preparation and Characterization. Get access to over 12 million other articles!

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serum type and concentration both affect the protein

Serum type and concentration both affect the protein

A quantitative analysis of corona proteins was conducted by Bradford assay after alkaline hydrolysis of PLGA–NPs. Finally, the consequences of corona formation on the interaction between NPs and cells were examined by in vitro incubation experiments with the human liver cancer cell line HepG2.

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dextran-polyacrylamide as matrices for creation

Dextran-Polyacrylamide as Matrices for Creation

The D70-g-PAA copolymer was saponified by alkaline hydrolysis using NaOH to obtain branched polyelectrolyte, referred to as D70-g-PAA(PE) throughout [27]. The degree of saponification of carbamide groups to carboxylate ones onto PAA-granted chains determined by potentiometric titration was equal to 43% [27].

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pressure-induced polymerization of acrylic acid: a raman

Pressure-Induced Polymerization of Acrylic Acid: A Raman

We report here the first in-situ Raman spectroscopic study of pressure-induced structural and polymeric transformations of acrylic acid. Two crystalline phases (I and II) were observed upon compression to ∼0.3 and ∼2.7 GPa. Phase I can be characterized with a single s-cis molecular conformation with possibly a similar structure to the low-temperature phase, while phase II suggests

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chemical stability limits of water-soluble polymers used

Chemical Stability Limits of Water-Soluble Polymers Used

Commercial Poly-acrylamides A, B, and C were 30, 30, and 26 mol% acrylate, Poly-acrylamides A, B, and C were 30, 30, and 26 mol% acrylate, respectively. Polyacrylamides A and B are copolymers of acrylamide and acrylate salt, whereas Polyacrylamide C was prepared by partial hydrolysis.

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polymers | free full-text | effect of aging, antioxidant

Polymers | Free Full-Text | Effect of Aging, Antioxidant

As an improvement, partially hydrolyzed polyacrylamide (HPAM) was suggested, by converting some of the amide group on the polyacrylamide (PAM) to the carboxylate group during the hydrolysis process [], see Figure 1.Electrostatic repulsion caused by negative charges of the carboxylate groups distributed along the polymer chain helps the polymer to be uncoiled easily and therefore provides

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dextran-polyacrylamide as matrices for creation

Dextran-Polyacrylamide as Matrices for Creation

The D70-g-PAA copolymer was saponified by alkaline hydrolysis using NaOH to obtain branched polyelectrolyte, referred to as D70-g-PAA(PE) throughout [27]. The degree of saponification of carbamide groups to carboxylate ones onto PAA-granted chains determined by potentiometric titration was equal to 43% [27].

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development of a thermochemical process for hydrolysis

Development of a Thermochemical Process for Hydrolysis

1 development of a thermochemical process for hydrolysis of polylactic acid polymers to l lactic acid and its purification using an engineered microbe by diane sylvie chauliac a dissertation presented to the graduate school of the university of florida in partial fulfillment of the requirements for the degree of doctor of philosophy university

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peer-reviewed article bioresources - semantic scholar

PEER-REVIEWED ARTICLE bioresources - Semantic Scholar

PEER-REVIEWED ARTICLE bioresources.com Chen et al. (2012). “Cationic polymers & ASA sizing,” BioResources 7(3), 3948-3959. 3952 0 50 100 150 200 250 300 PAC ASA ASA PAC Alum ASA ASA Alum Fig. 2. Effect of the order of addition of PAC (alum) on ASA sizing (1% PAC or alum, 0.3% ASA,

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ice-binding protein from shewanella frigidimarinas

Ice-Binding Protein from Shewanella frigidimarinas

The ability of a natural ice-binding protein from Shewanella frigidimarina (SfIBP) to inhibit ice crystal growth in highly alkaline solutions with increasing pH and ionic strength was investigated in this work. The purity of isolated SfIBP was first confirmed via sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and size-exclusion chromatography with an ultraviolet detector

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study of microscopic and macroscopic displacement

Study of Microscopic and Macroscopic Displacement

Performance of a polymer flood process requires the knowledge of rheological behavior of the polymer solution and reservoir properties such as rock wettability. To provide a better understanding of effects of polymer chemistry and wettability on the performance of a polymer flood process, a comprehensive experimental study was conducted using a two-dimensional glass micromodel.

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rheology of fumed silica - journal of rheology

Rheology of fumed silica - Journal of Rheology

In this study, two types of fumed silica NPs with different surface chemistries and two types of HPAM polymers with different molecular weights were dispersed/dissolved in deionized water. Linear viscoelastic properties of the hybrid solution systems were studied based on their step-stress (creep) and small amplitude oscillatory shear responses.

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study of microscopic and macroscopic displacement

Study of Microscopic and Macroscopic Displacement

Performance of a polymer flood process requires the knowledge of rheological behavior of the polymer solution and reservoir properties such as rock wettability. To provide a better understanding of effects of polymer chemistry and wettability on the performance of a polymer flood process, a comprehensive experimental study was conducted using a two-dimensional glass micromodel.

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tempo/nabr/naclo-mediated surface oxidation

TEMPO/NaBr/NaClO-mediated surface oxidation

Abstract. TEMPO/NaBr/NaClO-mediated surface oxidation of NCC, acid-extracted from aspen kraft pulp, was studied, and the properties of nanocellulose whiskers before and after oxidation were characterized by conductimetry, Fourier transform infrared spectroscopy, X-ray diffraction, and atomic force microscopy.

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evaluation of the embryotoxicity in zebrafish (danio rerio

Evaluation of the embryotoxicity in zebrafish (Danio rerio

WF424 is a flocculant anionic polymer, obtained from the copolymerization of acrylamide with acrylic acid or by hydrolysis reactions of polyacrylamide. Through a hydrolysis process, the amide group is replaced by a carboxylic group. In this way, the molecule acquires negative charge in a neutral or alkaline medium.

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an overview of chemical enhanced oil recovery: recent

An overview of chemical enhanced oil recovery: recent

Despite the progress made on renewable energy, oil and gas remains the world’s primary energy source. Meanwhile, large amounts of oil deposits remain unrecovered after application of traditional oil recovery methods. Chemical enhanced oil recovery (EOR) has been adjudged as an efficient oil recovery technique to recover bypassed oil and residual oil trapped in the reservoir.

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peptidoglycan o acetylation and autolysin profile

Peptidoglycan O Acetylation and Autolysin Profile

peptidoglycan pellets after hydrolysis in 4 M HCl at 96°C in vacuo for 18 h. Susceptibility of peptidoglycans to lysozyme hydrolysis. Peptidoglycan was isolated and purified as a substrate from cultures of E. faecalis grown to the mid-exponential, stationary, and VBNC phases. Suspensions of the peptidogly-

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reducing end modification on cellulose nanocrystals

Reducing end modification on cellulose nanocrystals

Reducing end modification on cellulose nanocrystals: strategy, characterization, applications and challenges†. Han Tao a, Nathalie Lavoine b, Feng Jiang c, Juntao Tang d and Ning Lin * a a School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China.

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peh:polymers, gels, foams, and resins - petrowiki

PEH:Polymers, Gels, Foams, and Resins - PetroWiki

Kabir presents a high-level overview of the use of polymers, gels, foams, and resins as water and gas shutoff treatments. The vast majority of conformance-improvement treatments function by reducing the permeability and fluid-flow capacity of the offending and treated reservoir high-permeability flow paths, channels, and conduits.

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sulfate-polyacrylamide gel electrophoresis. bromide

sulfate-polyacrylamide gel electrophoresis. bromide

(LPS) in polyacrylamide gels by silver staining (6, 18) was developed after trials involving Detection of lipopolysaccharides by ethidium bromide staining after sodium dodecyl sulfate-polyacrylamide gel electrophoresis. N Kido, M Ohta and N Kato J. Bacteriol. 1990, 172(2):1145.

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