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cationic polyacrylamide thermal stability in poland

  • Cationic Polyacrylamide Less Price High Purity Fast

    Cationic Polyacrylamide: Stock No: NS6130-12-000391: CAS: 9003-05-8: Confirm: APS: 40-50 µm: Confirm: Purity: 99.9%: Confirm: Molecular Formula: C3H5NO: Confirm: Molecular Weight: 3-16 Million (adjustable) Confirm: Color: off-white: Confirm: pH: 4-9: Confirm: Solid Content: ≥88 %: Confirm: Degree of Hydrolysis: Low, Medium, High: Confirm: Dissolution Time: ≤1hour: Confirm: Hydrolysis degree: 20 …

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  • Thermal decomposition behavior and mechanism

    2020-8-5 · The thermal decomposition behavior of polyacrylamide poly (methacryloyloxyethyl trimethylammonium chloride-acrylamide) (P(DMC-AM)) was studied by means of TG and DSC under nitrogen atmosphere at temperature range of 323.15–823.15 K. The effect of cationicity on thermal stability was discussed. The TG/DSC curves indicated that the decomposition process of P(DMC-AM) …

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  • Aggregation and thermal properties of

    2020-5-27 · Based on the adsorption, electrokinetic, thermal stability and aggregation results it can be stated that montmorillonite soil mineral particles covered with cationic polyacrylamide layers effectively immobilize hazardous lead(II) ions, leading to increase of aggregation possibilities of such systems. The detailed conclusions were as follows: (1)

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  • Theoretical studies of hydrolysis and stability of ...

    2015-11-1 · Abstract. Thermal stability of water-soluble polyacrylamide (PAM) and partially hydrolyzed polyacrylamide (HPAM) polymers under various solution conditions have been studied utilizing Quantum Mechanics Density Functional Theory (DFT) computational modeling method. The hydrolysis reaction of the amide group (AM) to form acrylic acid (AA) is ...

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  • Impact of anionic and cationic polyacrylamide on the ...

    2015-1-17 · In the case of cationic polyacrylamide, the mechanism of suspension stability in its presence has rather electrosteric character. This process is facilitated by the more extended conformation of PAM-adsorbing macromolecules (99.9 % degree of ionization of the functional groups). They assume on the solid surface more stretched structure.

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  • Effect of the presence of cationic polyacrylamide on

    2014-11-30 · The effect of the adsorption of cationic polyacrylamide (having a different content of the positively charged groups in macromolecules) on the stability mechanism of aluminum(III) oxide suspension was studied. Adsorption, electrokinetic, viscosity and stability measurements were carried out at three pH values: 3, 6 and 9.

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  • Impact of anionic and cationic polyacrylamide on the ...

    Fig. 2 Hydrodynamic radius of PAM macromolecules (Rh) of PAM in the solution at different pH values, CPAM=100 ppm - 'Impact of anionic and cationic polyacrylamide on the stability of aqueous alumina suspension—comparison of adsorption mechanism'

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  • Impact of anionic and cationic polyacrylamide on the ...

    2020-8-5 · The thermal decomposition behavior of polyacrylamide poly (methacryloyloxyethyl trimethylammonium chloride-acrylamide) (P(DMC-AM)) was studied by means of TG and DSC under nitrogen atmosphere at temperature range of 323.15–823.15 K. The ...

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  • Hydrophobic modification of cationic microblocked ...

    In the present study, particular emphasis was put on the effects of the type of functional groups of anionic and cationic polyacrylamide (PAM) and solution pH on the mechanism of polymer adsorption on the surface of dispersed alumina. The polymer-adsorbed amount, surface charge density and zeta potential of solid particles without and with PAM, as well as the stability of Al2O3 suspension ...

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  • Impact of anionic polyacrylamide on stability and surface ...

    2017-8-26 · Impact of anionic polyacrylamide on stability and surface properties of the Al2O3–polymer solution system ... face causes changes in the thermal stability of the examined ... 20-031 Lublin, Poland 3 Department of Physical Chemistry—Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Sklodowska University, M. ...

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  • Thermal stability of polyacrylamide solutions: effect of ...

    We have investigated the effect of temperature on the chemical (hydrolysis) and thermal (molecular weight) stability of purified polyacrylamide solution.From viscosity and light scattering data we show that no polymer degradation due to oxygen contamination results from heating polymer solutions although higher temperature is responsible for hydrolysis of amide groups.

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  • Impact of anionic and cationic polyacrylamide on the ...

    2015-1-17 · In the present study, particular emphasis was put on the effects of the type of functional groups of anionic and cationic polyacrylamide (PAM) and solution pH on the mechanism of polymer adsorption on the surface of dispersed alumina. The polymer-adsorbed amount, surface charge density and zeta potential of solid particles without and with PAM, as well as the stability of Al2O3 suspension ...

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  • Impact of anionic polyacrylamide on stability and

    The stability mechanism and thermal properties of the system alumina-anionic polyacrylamide (PAM) was studied. The polymer's adsorption properties in dependence on the following parameters solution pH (in the range 3-9), temperature (in the range 15-35 °C), and carboxyl groups' content in the PAM chains (in the range 5-30 %) were examined.

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  • Thermal stability of montmorillonite polyacrylamide

    2013-5-1 · The thermal stability of the CPN was examined in a TA Instruments SDT Q600 thermoanalyzer. TG and DTA measurements were carried out using about 10 mg of sample in an air atmosphere (a flow rate of 100 ml/min) from 30 to 1000 °C at a heating rate of 20 °C/min.

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  • Effect of the presence of cationic polyacrylamide on

    2014-11-30 · The effect of the adsorption of cationic polyacrylamide (having a different content of the positively charged groups in macromolecules) on the stability mechanism of aluminum(III) oxide suspension was studied. Adsorption, electrokinetic, viscosity and stability measurements were carried out at three pH values: 3, 6 and 9.

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  • Aggregation and thermal properties of

    The aim of the study was to investigate the influence of nanostructured montmorillonite surface modification by the cationic polyacrylamide and the lead(II) ions on the thermal and aggregation properties of solid particles covered with mixed adsorption layers. The effects of cationic groups content in the polymeric macromolecules, the order of individual adsorbates addition, and lead(II) ions ...

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  • Studies of the Cationic Polyacrylamide Adsorption on the ...

    2019-7-3 · A cationic polyacrylamide (Korona) with different contents of dissociated groups (35% and 80%) with molecular weights equal to 7000 kDa was also used. All adsorption measurements were carried out at pH = 5 ± 0.1 and 25 °C in the presence of 0.001 M NaCl. Adsorbed amounts of cationic polyacrylamide and

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  • Design and Study of a Novel Thermal-Resistant and Shear ...

    2017-7-21 · In this work, a novel thermal-resistant and shear-stable amphoteric polyacrylamide (PASD), prepared from acrylamide (AM), sodium styrene sulfonate (SSS), and acryloxyethyl trimethylammonium chloride (DAC) monomers, was prepared by free-radical polymerization in high-salinity solution.

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  • Hydrolysis and thermal stability of partially hydrolyzed ...

    Partially hydrolyzed polyacrylamide (HPAM) is the water‐soluble polymer most often used in flooding applications in the petroleum industry. However, in aqueous solutions at high temperatures, HPAM undergoes hydrolysis of the lateral amide groups, and the presence of salts in the solution can lead to precipitation of this polymer.

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  • Mechanical and Thermal Stability of Polyacrylamide

    2013-4-8 · In a previous work (Zaitoun, et al., 2012), a study of the shear stability of different EOR polymers was reported.Shear stability was found to directly correlate to chain flexibility. Thus, for a flexible coil such as polyacrylamide, the presence of large monomer groups (e.g. ATBS, NVP) leads to an increase of its rigidity, hence enhancing its shear stability.

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  • Preparation, characterization, and sludge conditioning of ...

    2019-9-4 · The chemical structure, morphology, and thermal stability were analyzed 23 through instrumental analysis. Proton nuclear magnetic resonance indicated that NP was 24 successfully prepared, and a small fraction of cationic homopolymer was mixed in the product. 25 Polymerization conditions were optimized, and polymerization mechanism was determined by

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  • Thermal Stability of r-Amylase from Aspergillus oryzae ...

    2003-9-8 · the thermal stability (50-75 °C) of Aspergillus oryzaeR-amylase immobilized in polyacrylamide gel in phosphate buffer, mashed potatoes, and minced shrimp was examined. Changing the cross-linking agent concentration from 3.3 to 5.3% and adding 2% salt did not markedly affect the thermal stability of the immobilized R-amylase.

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  • Thermodynamic stability of polyacrylamide and

    Thermodynamic stability of polyacrylamide and poly(N,N‐dimethyl acrylamide) ... Thermal degradation to form a radical would require the cleavage of carbon–carbon bonds in the polymer chain; the energy needed for this cleavage was found to depend on the structure of the repeat unit which ranged from low of 72.5 kcal for a rare head‐to ...

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  • Sinofloc Polyacrylamide with AMPS - Sinofloc Chemical

    However, although the most commonly used polyacrylamide has a certain oil displacement effect, the viscosity of polyacrylamide decreases rapidly with the increase of the mineralization degree of formation water. At the same time, the oil well temperature of the oil layer is higher and the thermal stability of polyacrylamide is affected.

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  • Thermal Stability of Immobilized Glucoamylase

    2014-9-9 · Glucoamylase[α-1,4: 1,6-glucan-4: 6-glucohydroease, EC 3.2.1.3] from Rhizopus niveus was entrapped in polyacrylamide gels and adsorbed onto SP-Sephadex C–50 to elucidate the thermostability mechanism of immobilized enzymes. The thermal stability of immobilized glucoamylase entrapped in polyacrylamide gels was enhanced slightly compared with glucoamylase in free solution, and was …

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  • Self-Assembly Preparation of Nano-Lignin/Cationic ...

    2021-5-25 · dispersed throughout, the polymer matrix. Lignin nanoparticles can improve the thermal stability and mechanical and barrier properties of the resulting composite material [8]. In addition, some studies have indicated that nano-lignin particles exhibit antibacterial and non-cytotoxic properties [9–11].

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  • The rheological behavior of graphite oxide/cationic ...

    2016-10-11 · Cationic polyacrylamide (CPAM) is added into graphite oxide (GO) suspensions to purify the GO. A proper understanding of the best addition amount of CPAM and the rheological properties of GO/CPAM is important for filtration and the design of pumping systems for transportation. Both experimental and theoretical anal

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  • Impact of Spacer Nature and Counter Ions on Rheological ...

    2020-5-1 · Structures of cationic gemini surfactants (Gem-A to Gem-D) used in this study. Table 1. Molecular weights of cationic polyacrylamide. Polymer Name Molecular Weight (million g/mol) FO 4290 SSH 8.3–10.8 FO 4440 SSH 6.8–9.1 FO 4290 SH 5.7–8.3 FO 4800 SH 4.7–6.7 2. Materials and Methods 2.1. Materials Fourdi ...

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  • Impact of anionic polyacrylamide on stability and

    The stability mechanism and thermal properties of the system alumina-anionic polyacrylamide (PAM) was studied. The polymer's adsorption properties in dependence on the following parameters solution pH (in the range 3-9), temperature (in the range 15-35 °C), and carboxyl groups' content in the PAM chains (in the range 5-30 %) were examined.

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  • Application of Polyacrylamide in agricultural

    2015-5-2 · Polyacrylamide as colorless granule solution for viscous liquid, nearly transparent, non-toxic, non corrosive, at 150 DEG C to thermal decomposition in the environment, good stability. A cationic, anionic, nonionic, zwitterionic and other types of ultra high molecular weight polyacrylamide, with different polymerization degree, with molecular ...

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  • Article Production of Cationic Polyacrylamide Flocculant P ...

    2019-9-4 · 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]; …

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  • Sinofloc Polyacrylamide with AMPS - Sinofloc Chemical

    However, although the most commonly used polyacrylamide has a certain oil displacement effect, the viscosity of polyacrylamide decreases rapidly with the increase of the mineralization degree of formation water. At the same time, the oil well temperature of the oil layer is higher and the thermal stability of polyacrylamide is affected.

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  • Polyacrylamide PAM Flocculant for Water Treatment -

    Polyacrylamide PAM, with the chemical formula of (C3H5NO)n and the CAS NO. of 9003-05-8, is a linear polymer. Polyacrylamide polymer has good thermal stability, can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid. PAM is one of the most widely used water-soluble polymers.

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  • Anionic Polymer Flocculant & Polyacrylamide Powder ...

    Synthesis and characterization of a cationic polyacrylamide flocculant CAO JianPing ZHANG Sheng HAN BaoLi (Key Laboratory of Carbon Fiber and Functional Polymers,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China)

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  • Synthesis and characterization of a cationic ...

    Disulfilde bonds and thermal stability in T4 lysozyme ... polyacrylamide gels as described (15). Variants containing the Ile-3 -* Cys-3, Cys-54 -+ Thr-54, Cys-54 -* Val-54, and ... Stability is more rigorously characterized as the free energy of denaturation at a given temperature, AG(T), which may be

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  • Disulfide Bonds and Thermal Stability in T4 Lysozyme

    Modifications of polyacrylamide structure have been proposed to postpone their thermal stability to higher temperatures. Monomers such as acrylamido methylpropane sulfonate (AMPS) or sulfonated styrene/maleic anhydride can be used to prevent acrylamide comonomer from hydrolysis. The aim of this work is to study under controlled conditions, i.e ...

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  • Thermal stability of sulfonated polymers

    Patcharin, R., T. Juming, and A. R. Barbara, “Thermal stability of α-amylase from Aspergillus oryzae entrapped in polyacrylamide gel”, J. Agri. Food Chem. 51: 5462-5466, 2003. has been cited by the following article: ... (BSA) as a modifier was used with glutaraldehyde as a binder to study the activity and thermal stability of ...

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  • thermal stability of montmorillonite polyacrylamide ...

    2021-5-15 · Thermal stability of high-molecular-weight polyacrylamide . The above reported data show that temperature affects the stability of commercial polyacrylamide solutions in two different ways: The first process that increases the anionic character of polymers is responsible for the viscosity loss in the presence of monovalent salts and for eventual precipitation in the presence of divalent salts ...

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  • polyacrylamide mechanical degradation stability |

    Polyacrylamide Mechanical Degradation and Stability in the ... Thermal stability of polyacrylamide solutions: effect of residual impurities in the molecular-weight-degradation process upon heating. Polym. Bull. 5, 39–45. doi: 10.1007/BF00255085. Free Inquiry

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  • pam polyacrylamide pam good thermal stability

    Mechanical and Thermal Stability of Polyacrylamide-based The exceptional mechanical and thermal stability of the polyacrylamide-based microgels and their easiness to be tailored for the required application make these chemicals excellent candidates as ...

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  • Cationic Polyacrylamide PAM in Germany, Cationic ...

    2017-3-27 · Cationic Polyacrylamide PAM We supply full range of cationic dry powder (CPAM) flocculants that are particularly effective in primary clarification, sludge thickening and sludge dewatering applications in the municipal area.

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  • pam/polyacrylamide pam good thermal stability

    Polyacrylamide-Polyacrylamide-Shengli Oilfield Highland Petroleum Equipment Co., Ltd. PAM has good thermal stability below 100 , and will not decompose until 150 . Polyacrylamide and its derivant can be used widely in water treatment, paper making, petroleum, coal, …

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  • Polyacrylamide thermal stability - Big Chemical

    Polyacrylamide thermal stability Synthetic polymers and natural polymers suitable for drilling muds are listed in Tables 1-7 and 1-8, respectively. Polyacrylamides are eventually hydrolyzed in the course of time and temperature. This leads to a lack of tolerance toward electrolyte contamination and to a rapid degradation inducing a loss of their properties.

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  • stability thickening polyacrylamide pam

    Polyacrylamide cationic polyacrylamide anionic ... Polyacrylamide cationic ... Increasing Stability of Latex PAM is good thickening agent of natural latex, ... PAM cannot be added into water directly, ... Inquire Now; Patent US3658734 Guar gum-polyacrylamide . Guar gum-polyacrylamide compositions US 3658734 A. Samenvatting beschikbaar in het .

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  • Simultaneous thermal analysis of cationic, nonionic

    A locked padlock) or https:/ means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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  • Article Production of Cationic Polyacrylamide Flocculant P ...

    2019-9-4 · 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]; …

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  • Expression of plectasin in Pichia pastoris and its ...

    Recombinant plectasin, the first fungus defensin, was expressed in Pichia pastoris and purified, and its physical, chemical and antimicrobial characteristics were studied. Following a 120 h induction of recombinant yeast, the amount of total secreted protein reached 748.63 μg/ml. The percentage of r …

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  • Disulfide Bonds and Thermal Stability in T4 Lysozyme

    Disulfilde bonds and thermal stability in T4 lysozyme ... polyacrylamide gels as described (15). Variants containing the Ile-3 -* Cys-3, Cys-54 -+ Thr-54, Cys-54 -* Val-54, and ... Stability is more rigorously characterized as the free energy of denaturation at a given temperature, AG(T), which may be

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  • Synthetic polyacrylamide as a potential flocculent to ...

    Four samples of cationic polyacrylamide—PAM (Kor-ona)—characterized by different contents of cationic groups were applied (Fig. 1; Table 1). The chemical for-mula of this polymer is: N+ CH3 CH2 CH NH2 n C O CH2 CH m O C O CH2 CH2 CH3 CH3 Cl-ð1Þ This PAM cationic form is obtained by copolymerization reaction of acrylamide with cationic ...

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  • Thermal stability of sulfonated polymers

    Modifications of polyacrylamide structure have been proposed to postpone their thermal stability to higher temperatures. Monomers such as acrylamido methylpropane sulfonate (AMPS) or sulfonated styrene/maleic anhydride can be used to prevent acrylamide comonomer from hydrolysis. The aim of this work is to study under controlled conditions, i.e ...

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  • Degradation of Polyacrylamide and Its Derivatives in ...

    General features of degradation of polyacrylamide and its anionic and cationic derivatives under the action of radical degradative agents are considered. The molecular weight of these polymers can be controlled by varying the structure and concentration of the degradative agent and salt additions, the concentration, molecular weight, and composition of the initial (co)polymer, and the process ...

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  • Synthesis and properties of polyacrylamide by ...

    Also the thermal test of the prepared HPAM/clay was investi-gated by the thermal gravimetric analysis as shown in Fig. 7. The thermogravimetric curves of the HPAM/clay showed three stages for the weight loss the same as that of the HPAM. The first one oc-curred in …

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  • Synthesis and Thermal Stability of Glyoxalated Alkali ...

    Synthesis and Thermal Stability of Glyoxalated Alkali Lignin-Polyvinylpyrrolidone Resins Aikfei Ang,a,* Zaidon Ashaari,a Edi S. Bakar,a and Ibrahim Nor Azowab Natural, renewable, and non-toxic lignin-based resin was synthesized through copolymerization with monomeric N-vinyl-2-pyrrolidone (VP) in

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  • Patcharin, R., T. Juming, and A. R. Barbara, “Thermal ...

    Patcharin, R., T. Juming, and A. R. Barbara, “Thermal stability of α-amylase from Aspergillus oryzae entrapped in polyacrylamide gel”, J. Agri. Food Chem. 51: 5462-5466, 2003. has been cited by the following article: ... (BSA) as a modifier was used with glutaraldehyde as a binder to study the activity and thermal stability of ...

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  • Improving the Thermal Stability of Hydrophobic

    2010-5-14 · Cationic bulk polymerization of L , L‐ lactide (LA) initiated by trifluromethanesulfonic acid [triflic acid (TfA)] has been studied. At temperatures 120–160 °C, polymerization proceeded to high conversion (>90% within ∼8 h) giving polymers with M n ∼ 2 × 10 4 and relatively high dispersity. Thermogravimetric analysis of resulting polylactide (PLA) indicated that its thermal stability ...

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  • Cationic polymerization of L,L‐lactide - Baśko - 2010 ...

    In the current study, two diverse cellulose models (water only; water, dicyandiamide, melamine and polyacrylamide) are developed and analyzed. Numerous model variables, including the diffusion coefficient of water and cellulose chain distance, are collated, in order to examine the effects of amines on the thermal stability of cellulose.

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  • Degradation of Polyacrylamide: A Review | Scientific.Net

    Water-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various oil ...

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  • Cas 9003-05-8,Polyacrylamide | lookchem

    Anionic and cationic polyacrylamide Polyacrylamide is non-toxic and with a high molecular weight and is highly water soluble, and can introduce a variety of ionic groups for adjusting the molecular weight to obtain specific performance; it has good adhesion to many solid surface and dissolved substances, and can adhere or bridge the suspended particles dispersed in the solution for ...

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  • Thermal unfolding of eosinophil cationic protein ...

    Its thermal stability has been extensively characterized as a process following the two-state model, and by means of different techniques, it has been found at a T 1/2 value near to 60°C at pH 6 (Torrent et al. 2001). Eight human proteins that conserve the active-site amino acid residues have been identified by sequence homology.

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  • China Polyacrylamide(PAM);polyacrylamide Water

    Polyacrylamide (PAM) is a linear polymer with good thermal stability. It can be dissolved in water in any proportion as polyacrylamide water treatment, and the aqueous solution is a uniform and transparent liquid. 1、Anionic polyacrylamide contains a certain number of polar groups in its molecular chain.

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  • Synthesis and Characterization of Porous Hydrogel Based

    thermal stability of PAAm. SEM images showed that the honeycomb-like structure of the hydrogel was improved with increasing AAL content. The swelling ratio data showed that the hydrogel with a high AAL/AAm ratio was sensitive to pH. Furthermore, increased lignin content of …

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  • Inverse Emulsion of Starch‐graft‐Polyacrylamide - Lu ...

    2003-5-6 · An inverse emulsion of cationic starch‐graft‐polyacrylamide was prepared by inverse emulsion polymerization and a subsequent Mannich reaction. The copolymerization was carried out using potassium persulfate as initiator. The reaction conditions and factors affecting emulsion stability were studied. Experiments showed that a high solids ...

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  • Synthesis and Application of a Cationic

    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). Ethylene diamine tetraacetic acid was used as a chelating agent; dimethylaminoethyl methacrylate methyl chloride (DMC) solution was used as a cationic monomer, and ammonium persulfate ...

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  • Cationic Starches as Substitute for Synthetic Cationic ...

    2007-6-7 · Harbor sludge (about 25% total solid) has to be dredged to keep the waterways free. Thus, annually 1.2 million m3 of dredged material has to be cleaned. For this process, three different synthetic flocculants with optimal molar masses, ionogenities, and concentrations are added in order to get a good dewatering efficiency and shear strength of the flocs. But as synthetic flocculants bring ...

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