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types of polyacrylamide thermal stability

  • 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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  • Thermal stability of high-molecular-weight

    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 even if the molecular weight is not changed.Such a process will be …

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  • Theoretical studies of hydrolysis and stability of ...

    2015-11-1 · 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.

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  • Mechanical and thermal stability of polyacrylamide

    Comparative tests were performed with microgels and three different polyacrylamide-based EOR polymers in terms of shear and thermal stability. The impact of the internal cross-linking density, the size and the conditioning on microgels mechanical stability was investigated.

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  • An approach to evaluate polyacrylamide-type

    2019-9-1 · 2.2. Thermal gravimetric analysis. The thermal behaviors of polymers were analyzed by thermal gravimetric measurements. The polymer sample in powder form was encapsulated in a standard Al 2 O 3 sample crucible and the sample was heated to 650 °C with a heating rate of 10 °C/min. The tests were performed in a pure Nitrogen environment with a flow rate of 60 ml/min.

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  • Investigation of the degradation and stability of ...

    2016-12-1 · In order to observe the stability of acrylamide-based polymers in acid, the above four types of prepared polymers were assembled into eight polymer solutions (two replications of each polymer type), with viscosity ranging from 10 to 30 cp. Hydrochloric acid was then added to the eight polymer solutions to comprise 1 wt% HCl and 10 wt% HCl solutions for each polymer solution.

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  • Thermal degradation of polyacrylamide and

    The thermal degradation behavior of polyacrylamide and poly (acrylamide-co-acrylate) was studied by differential scanning calorimetry, thermogravimetric analysis, gas chromatography/mass spectrometry, …

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  • Polyacrylamide degradation and its implications in ...

    2018-9-7 · Thermal degradation of polyacrylamide (in the absence of free radicals) does not cause substantial chain scission except at very high temperatures, on the order of 300 °C.

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  • Synthesis, characterization and evaluation of ...

    2017-11-16 · high thermal and shear stability because of the attachment of polyacrylamide chains onto the rigid polysaccharide backbone. These graft polymers react with different crosslinkers to form three-dimensional (3D) hydrophilic network hydrogel. Starch is a potentially useful material because of its natural abundance and low cost. The demand

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  • Comparison of the thermal stabilities of reverse ...

    These results suggest that AMV RT and MMLV RT are different in the following: (i) The intrinsic thermal stability of AMV RT is higher than that of MMLV RT; (ii) AMV RT is activated by thermal treatment with the T/P at 45-48 degrees C; and (iii) AMV RT is stabilized by the T/P more potently than MMLV RT.

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  • Characteristics and applications of polyacrylamide -

    2021-4-1 · Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)n. It is a hard glassy solid at room temperature. The products include glue, latex and white powder, translucent beads and flakes. Good thermal stability. It can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid.

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  • Chemical Stability of Polyacrylamide Under Simulated

    The adverse effect of metals on polyacrylamide stability under atmospheric conditions was alleviated by decreasing the oxygen content to 0.2 ppm oxygen. He also tested several polymer samples under air-free conditions by purging the samples in a glove box and adding sodium hydrosulfite to scavenge oxygen; no oxidative degradation was observed ...

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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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  • Impact of anionic polyacrylamide on stability and

    2016-7-9 · 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 degradation of polyacrylamide and

    Department of Chemistry, Trinity Western University, Langley, British Columbia, Canada V3A 4R9. Search for more papers by this author

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  • Polyacrylamide degradation and its implications in ...

    2018-9-7 · Pei, Y., et al. Investigation of the degradation and stability of acrylamide-based polymers in acid solution: Functional monomer modified polyacrylamide. Petroleum 2 , 399–407 (2016). Article ...

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  • Production, thermal stability and immobilisation of ...

    Glycerol (10%) gave better protection to inulinase against thermal denaturation at 50 degrees C compared to ethylene glycol and sorbitol. Inulinase immobilised in polyacrylamide gel retained 45% of its original activity. The immobilised enzyme showed a higher optimum temperature (45 degrees C) compared to free enzyme (37 degrees C).

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  • Polymers | Free Full-Text | Assessment of

    2021-3-12 · The thermal degradation process of polymers is widely studied because of both academic and industrial interest. Here we have investigated the kinetics of thermal degradation and structural modification of polyacrylamide ultrathin films as a result of heat treatment at …

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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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  • Mechanical and Thermal Stability of Polyacrylamide

    2013-4-8 · 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 future sweep improvers under harsh reservoir conditions in which other conventional polymers might fail.

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  • Thermal degradation of polyacrylamide and

    Department of Chemistry, Trinity Western University, Langley, British Columbia, Canada V3A 4R9. Search for more papers by this author

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  • Polyacrylamide degradation and its implications in ...

    2018-9-7 · Pei, Y., et al. Investigation of the degradation and stability of acrylamide-based polymers in acid solution: Functional monomer modified polyacrylamide. Petroleum 2 , 399–407 (2016). Article ...

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  • Characteristics and applications of polyacrylamide -

    2021-4-1 · Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)n. It is a hard glassy solid at room temperature. The products include glue, latex and white powder, translucent beads and flakes. Good thermal stability. It can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid.

    Get Price
  • Production, thermal stability and immobilisation of ...

    Glycerol (10%) gave better protection to inulinase against thermal denaturation at 50 degrees C compared to ethylene glycol and sorbitol. Inulinase immobilised in polyacrylamide gel retained 45% of its original activity. The immobilised enzyme showed a higher optimum temperature (45 degrees C) compared to free enzyme (37 degrees C).

    Get Price
  • Evaluation of the Gel Profile Control Agent

    2020-8-14 · Figure 1 shows their thermal stability curves. It can be seen from Table 1 and Figure 1, the increasing extent of formula viscosity of A-2-2 prepared with sewerage is not large, the value drops to below 300 mPa.s, which receives poor effect; the rest three types of formula gel between 3 to 7 days except this one type above, but initial formula

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  • The thermal gelation behavior and performance

    2020-7-14 · The polyacrylamide contains a large number of amide groups (-CONH2) and carboxyl groups (-COO-) in its molecular chain after hydrolysis. It could crosslink with different types of crosslinkers, such as Cr3+ [6,7], Al3+ [8], Zr4+ [9] or phenolic resin [10-11] et al.. However, ... and the compatibility, microstructure, thermal stability and ...

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  • Preparation and study on miscibility, thermal

    2014-9-21 · It was observed that the degradation of Xanthan gum and Polyacrylamide starts at 214.3 and 220.1 °C (T initial), respectively and that for 50/50 blend, at 219.0 °C. It is clearly observed from the degradation temperature values that the thermal stability of the Xanthan gum was found to be increased by blending it with Polyacrylamide.

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  • Polyacrylamide PAM Flocculant for Water

    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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  • Mechanical and Thermal Stability of Polyacrylamide

    2013-4-8 · 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 future sweep improvers under harsh reservoir conditions in which other conventional polymers might fail.

    Get Price
  • 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 ...

    Get Price
  • Thermal degradation of polyacrylamide and

    Department of Chemistry, Trinity Western University, Langley, British Columbia, Canada V3A 4R9. Search for more papers by this author

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

    2017-3-23 · 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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  • Improved rheology and high-temperature stability of ...

    2020-6-13 · 1 Improved rheology and high-temperature stability of hydrolysed polyacrylamide using graphene oxide nanosheet Maje Alhaji Haruna1, Shahid Pervaiz1, Zhongliang Hu1, Ehsan Nourafkan1, Dongsheng Wen1, 2* 1School of Chemical and Process Engineering, University of Leeds, Leeds, U.K. 2School of Aeronautic Science and Engineering, Beihang University, Beijing

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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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  • Overview of Chemical EOR - University of Wyoming

    2021-6-15 · ¾Thermal stability • Core flooding ¾Reservoir conditions and fluids ¾Pressure taps on core ¾Wide range of variables. Polymer Selection • Hydrolyzed polyacrylamide polymers most likely choice, especially if salinity reduced ¾Probably only 3 manufacturers that …

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  • Application of Polyacrylamide in agricultural

    2015-5-2 · A cationic, anionic, nonionic, zwitterionic and other types of ultra high molecular weight polyacrylamide, with different polymerization degree, with molecular weight ranging from 500 to 24000000 Da (Da represents a 12C atomic mass 1/12) between changes.

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  • Elucidation of the thermal stability of the neutral ...

    The neutral proteinase II from Aspergillus oryzae (NpII) is a zinc proteinase with three intramolecular disulfide bonds. NpII is most unstable after 10 min at about 75 degrees C, but regains stability beyond this temperature and is relatively stable at 100 degrees C. We analyzed the thermal stabilit …

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  • Spherical Nanoindentation of Polyacrylamide

    Such range of polyacrylamide hydrogels is considered to have suitable mechanical properties to promote stem cell cultures to differentiate and form specific cell types. The selected concentrations cover a relatively broad range of elastic modulus from ~20 kPa to ~200 kPa (i.e. tenfold increase) and they are known to exhibit important time-dependent (creep) behavior.

    Get Price
  • Mechanical and thermal stability of polyacrylamide

    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 future sweep improvers under harsh reservoir conditions in which other conventional polymers might fail.

    Get Price
  • Stability of polyacrylamides in hard brines at elevated ...

    2021-7-11 · 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 structure. The primary mechanism of polyacrylamide degradation was found to be amide group hydrolysis.

    Get Price
  • Thermal degradation of polyacrylamide and

    Department of Chemistry, Trinity Western University, Langley, British Columbia, Canada V3A 4R9. Search for more papers by this author

    Get Price
  • Evaluation of the Gel Profile Control Agent

    Figure 1 shows their thermal stability curves. It can be seen from Table 1 and Figure 1, the increasing extent of formula viscosity of A-2-2 prepared with sewerage is not large, the value drops to below 300 mPa.s, which receives poor effect; the rest three types of formula gel between 3 to 7 days except this one type above, but initial formula

    Get Price
  • The thermal gelation behavior and performance

    2020-7-14 · The polyacrylamide contains a large number of amide groups (-CONH2) and carboxyl groups (-COO-) in its molecular chain after hydrolysis. It could crosslink with different types of crosslinkers, such as Cr3+ [6,7], Al3+ [8], Zr4+ [9] or phenolic resin [10-11] et al.. However, ... and the compatibility, microstructure, thermal stability and ...

    Get Price
  • 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 …

    Get Price
  • 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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  • Increase in thermal stability of Moloney murine

    We hypothesized that the thermal stability of Moloney murine leukaemia virus reverse transcriptase (MMLV RT) will increase with increases in its ability to bind with a template-primer (T/P). To test this hypothesis, we introduced positive charges into MMLV RT by site-directed mutagenesis at position …

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  • Research Article Inverse Emulsion Polymerization for the ...

    2019-7-31 · on polyacrylamide was synthesized by both solution and inverse emulsion processes to produce polymers in powder and emulsion forms, respectively, for easy application. e se materials were applied for wind erosion control and sand dune stabilization in Al-Ain town of the UAE. InverseEmulsionPolymerization. Acrylamidebasedpolymers

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  • Synthesis and properties of polyacrylamide by ...

    2017-1-1 · Polyacrylamide (PAM)-encapsulated clay nanoparticles (NPs) were successfully synthesised by conventional emulsion polymerisation for solving the aggregation matter of nanoscaled clay. A novel nanofluid based on PAM has been developed and its’ attributes have been experimentally tested as an optimised solution.

    Get Price
  • 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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  • Rheological and thermal stability of novel weak gels

    2016-10-25 · The present study deals with weak gels based on sulfonated polyacrylamide (SPA)/scleroglucan (SC)/Cr 3+ with an exceptional thermal stability in electrolyte media. The rheological results showed that on increasing the SC concentration the shear viscosity and storage modulus of the SPA/SC/Cr 3+ system were increased and the dependence of the storage modulus on frequency …

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  • Improved rheology and high-temperature stability of ...

    2020-6-13 · 1 Improved rheology and high-temperature stability of hydrolysed polyacrylamide using graphene oxide nanosheet Maje Alhaji Haruna1, Shahid Pervaiz1, Zhongliang Hu1, Ehsan Nourafkan1, Dongsheng Wen1, 2* 1School of Chemical and Process Engineering, University of Leeds, Leeds, U.K. 2School of Aeronautic Science and Engineering, Beihang University, Beijing

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  • Thermal Stability Experimental Study on Three Types

    2018-5-8 · The thermal stability study on organic binary PCMs used in thermal energy storage applications becomes fundamental and meaningful. In this study, thermal stability of three types of organic binary PCMs was experimentally investigated, which are frequently used in building and industry applications. To qualitatively investigate the stability of ...

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  • [PDF] Measurement and Simulation of Thermal

    DOI: 10.1520/JTE102271 Corpus ID: 55352861. Measurement and Simulation of Thermal Stability of Poly(Lactic Acid) by Thermogravimetric Analysis @article{Yang2009MeasurementAS, title={Measurement and Simulation of Thermal Stability of Poly(Lactic Acid) by Thermogravimetric Analysis}, author={Mu-Hoe Yang and Yeuh-Hui Lin}, journal={Journal of Testing and Evaluation}, …

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  • Synthesis and evaluation of partially hydrolysed ...

    2016-7-20 · 35 .SA. The thermal stability of PHPA solution was evaluatged in a Parr pressure reactor at ap-propriate temperature. The completely formulated muds were pre-pared using the synthesized PHPA as viscosifier, polyanionic cellulose (PAC) or carboxy methyl cellulose (CMC) as fluid loss controlling agent, and sodium salt of sulphonated asphaltene as

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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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  • Application of Polyacrylamide in agricultural

    2015-5-2 · A cationic, anionic, nonionic, zwitterionic and other types of ultra high molecular weight polyacrylamide, with different polymerization degree, with molecular weight ranging from 500 to 24000000 Da (Da represents a 12C atomic mass 1/12) between changes.

    Get Price
  • mechanical and thermal stability of polyacrylamide-base

    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 future sweep improvers under harsh reservoir conditions in which other conventional polymers might fail.

    Get Price
  • 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 ...

    Get Price
  • Stability of polyacrylamides in hard brines at elevated ...

    2021-7-11 · 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 structure. The primary mechanism of polyacrylamide degradation was found to be amide group hydrolysis.

    Get Price
  • stability thickening polyacrylamide - aladine.be

    Thermal stability and Solubility of polyacrylamide. Thermal stability of polyacrylamide Compared with other polyelectrolytes, polyacrylamide has high thermal stability. But when heated to above 100 C, the crosslinking is often caused by imines. Heating at high temperature for a …

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  • Thermal stability of polyacrylamide solution prepared

    2021-6-15 · Cite this article: KONG Bailing. Thermal stability of polyacrylamide solution prepared by oilfield produced water[J]. , 2001, 28(1): 2-0. URL:

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  • Mechanical and thermal stability of polyacrylamide

    DOI: 10.2118/164135-MS Corpus ID: 136695952. Mechanical and thermal stability of polyacrylamide-based microgel products for EOR @inproceedings{Dupuis2013MechanicalAT, title={Mechanical and thermal stability of polyacrylamide-based microgel products for EOR}, author={G. Dupuis and R. Al-Maamari and Abdul Aziz Al-Hashmi and H. Al-Sharji and A. Zaitoun}, year={2013} }

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  • Overview of Chemical EOR - University of Wyoming

    2021-6-15 · ¾Thermal stability • Core flooding ¾Reservoir conditions and fluids ¾Pressure taps on core ¾Wide range of variables. Polymer Selection • Hydrolyzed polyacrylamide polymers most likely choice, especially if salinity reduced ¾Probably only 3 manufacturers that …

    Get Price
  • Synthesis and properties of polyacrylamide by ...

    2017-1-1 · Polyacrylamide (PAM)-encapsulated clay nanoparticles (NPs) were successfully synthesised by conventional emulsion polymerisation for solving the aggregation matter of nanoscaled clay. A novel nanofluid based on PAM has been developed and its’ attributes have been experimentally tested as an optimised solution.

    Get Price
  • Spherical Nanoindentation of Polyacrylamide

    Such range of polyacrylamide hydrogels is considered to have suitable mechanical properties to promote stem cell cultures to differentiate and form specific cell types. The selected concentrations cover a relatively broad range of elastic modulus from ~20 kPa to ~200 kPa (i.e. tenfold increase) and they are known to exhibit important time-dependent (creep) behavior.

    Get Price
  • US20120111567A1 - Formate salts for increased

    US20120111567A1 US12/942,120 US94212010A US2012111567A1 US 20120111567 A1 US20120111567 A1 US 20120111567A1 US 94212010 A US94212010 A US 94212010A US 2012111567 A1 US2012111567 A1 US 2012111567A1 Authority US United States Prior art keywords fluid formate acrylamide polyacrylamide fluids Prior art date 2010-11-09 Legal status (The legal status …

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  • thermal stability and solubility of polyacrylamide by ...

    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 ...

    Get Price
  • 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

    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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  • 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 ...

    Get Price
  • Improved rheology and high-temperature stability of ...

    2020-6-13 · 1 Improved rheology and high-temperature stability of hydrolysed polyacrylamide using graphene oxide nanosheet Maje Alhaji Haruna1, Shahid Pervaiz1, Zhongliang Hu1, Ehsan Nourafkan1, Dongsheng Wen1, 2* 1School of Chemical and Process Engineering, University of Leeds, Leeds, U.K. 2School of Aeronautic Science and Engineering, Beihang University, Beijing

    Get Price
  • Chemical Stability of Polyacrylamide Under Simulated

    Abstract. The chemical instability of polyacrylamide polymer during both polymer and micellar-polymer polymer during both polymer and micellar-polymer flooding can seriously affec

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  • Application of Polyacrylamide in agricultural

    2015-5-2 · A cationic, anionic, nonionic, zwitterionic and other types of ultra high molecular weight polyacrylamide, with different polymerization degree, with molecular weight ranging from 500 to 24000000 Da (Da represents a 12C atomic mass 1/12) between changes.

    Get Price
  • Chemical stability of polyacrylamide‐coating on fused ...

    The chemical stability of polyacrylamide coatings on a fused silica capillary for capillary electrophoresis was investigated with respect to temperature of capillary and pH as well as salt concentrat...

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  • Thermal stability studies of hyperimmune horse

    Thermal stability studies of hyperimmune horse antivenoms. Rodrigues-Silva R(1), Antunes GF, Velarde DT, Santoro MM. Author information: (1)UFMG-ICB-Departamento de Bioquímica e Imunologia, Belo Horizonte/MG, Brazil.

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