Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. Please also feel free to contact us via email or phone. (* is required).

polyacrylamide thermal stability in chile

  • 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.

    Get Price
  • 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 …

    Get Price
  • The thermal degradation of polyacrylamide with

    2000-2-1 · In this study, we examined the thermal stability of polyacrylamide stabilized, by the introduction of metal additives. Moreover, we investigated the effect of three adsorbed metal ions on the thermal degradation of polyacrylamide by using Flynn's analytical model. 2. Experimental

    Get Price
  • 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.

    Get Price
  • Stability of Partially Hydrolyzed Polyacrylamides at ...

    2009-6-29 · years at 120°C. Within our experimental error, HPAM stability was the same with/without oil (decane). An acrylamide-AMPS copolymer (with 25% AMPS) showed similar stability to that for HPAM. Stability results were similar in brines with 0.3% NaCl, 3% NaCl, or 0.2% NaCl + 0.1% NaHCO3. At temperatures of 160°C and above, the polymers were more stable

    Get Price
  • Thermal stability of water-soluble polymers in solution ...

    2018-9-1 · The HPAM exhibited the greatest thermal stability, with τ values of 63.69 and 25.31 days at 80 and 100 °C, followed by CMC with τ values of 10.25 and 2.29 days at 80 and 100 °C, and KC with τ values of 3.89 and 1.26 days at 80 and 100 °C, respectively.

    Get Price
  • 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.

    Get Price
  • 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.

    Get Price
  • 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 ...

    Get Price
  • Polyvinylpyrrolidone affects thermal stability of drugs

    2018-11-15 · A comparison of the thermal stability of the PVP/FD system and pure FD is shown in Fig. 7, where the α vs T curves for these two systems are presented at the same heating rate. As seen in Fig. 7, the process in the PVP/FD system begins at lower temperature meaning that PVP has a deteriorating effect on the thermal stability of FD. For the pure FD, α = 0.1 is reached at 275 °C whereas for the …

    Get Price
  • 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 ...

    Get Price
  • 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.

    Get Price
  • Mechanism of Polyacrylamide Hydrogel Instability on

    A gel system composed of acrylamide (AM), N,N'-methylenebisAM (BIS), and ammonium persulfate ((NH 4) 2 S 2 O 8) was developed and applied extensively in reservoirs to reduce water cut and increase oil production in mature fields.However, this gel system suffers from thermal stability loss and syneresis at high temperatures that reduces its ability to control water flow.

    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
  • Stability of Partially Hydrolyzed Polyacrylamides at ...

    2009-6-29 · years at 120°C. Within our experimental error, HPAM stability was the same with/without oil (decane). An acrylamide-AMPS copolymer (with 25% AMPS) showed similar stability to that for HPAM. Stability results were similar in brines with 0.3% NaCl, 3% NaCl, or 0.2% NaCl + 0.1% NaHCO3. At temperatures of 160°C and above, the polymers were more ...

    Get Price
  • 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) …

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

    on stability polyacrylamide solution ... 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-

    Get Price
  • Polyacrylamide crosslinked by bis-vinylimidazolium

    2019-9-3 · A series of ionic compounds 1,n-dialkyl-3,3′-bis-l-vinylimidazolium bromide (C n VIM) are prepared and employed to crosslink acrylamide for polyacrylamide (PAAM) hydrogel preparation via in situ solution polymerization. The swelling behavior, mechanical properties and thermal stability of the prepared C n VIM crosslinked PAAM hydrogels are investigated.

    Get Price
  • Hydrolysis and thermal stability of partially hydrolyzed ...

    2019-4-8 · 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.

    Get Price
  • The effect of 1,6-hexamethylenediamine on thermal ...

    2018-12-19 · The capability of drilling fluid to endure high temperature and stabilize shale cuttings is important characteristics of drilling fluids. In this work, a combination of 1,6-hexamethylenediamine and polyanionic cellulose (PAC) was tested to observe the impact of 1,6-hexamethylenediamine on thermal stability of PAC and its influence on the shale cutting stability of drilling fluid.

    Get Price
  • 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
  • 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
  • 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.

    Get Price
  • Thermal stability, adsorption and rheological

    2017-1-12 · The objective of the present study is to improve the behavior of sulfonated polyacrylamide (SPA) by adding Laponite and/or chromium(III) with a focus on enhanced oil recovery applications. The resultant systems are weak nanocomposite hydrogels which are subjected to rheological, thermal stability and adsorption tests. The interactions between ingredients of the hydrogel are investigated by ...

    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 ...

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

    on stability polyacrylamide solution ... 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-

    Get Price
  • 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 …

    Get Price
  • Chemical Stability Limits of Water-Soluble Polymers

    Thermal Stability of Polyacrylamides in Oilfield Brines Containing Ca2+, Ions. In the absence of oxidative degradation, it has been well established that the backbone chain of vinyl polymers, such as polyacrylamide, is quite thermally stable to temperatures as high as 120 degrees C [248 degrees F].

    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
  • Comparison of the thermal stabilities of reverse ...

    In this study, we compared the thermal stabilities of AMV RT and MMLV RT by observing their irreversible thermal inactivation. The temperatures reducing initial activity by 50% in 10-min incubation, T(50), of AMV RT were 47 degrees C without the template-primer (T/P), poly(rA)-p(dT)(12-18), and 52 degrees C with the T/P (28 microM).

    Get Price
  • Chemical Stability Limits of Water-Soluble Polymers

    Thermal Stability of Polyacrylamides in Oilfield Brines Containing Ca2+, Ions. In the absence of oxidative degradation, it has been well established that the backbone chain of vinyl polymers, such as polyacrylamide, is quite thermally stable to temperatures as high as 120 degrees C [248 degrees F].

    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 ...

    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
  • Polyacrylamide crosslinked by bis-vinylimidazolium

    2019-9-3 · A series of ionic compounds 1,n-dialkyl-3,3′-bis-l-vinylimidazolium bromide (C n VIM) are prepared and employed to crosslink acrylamide for polyacrylamide (PAAM) hydrogel preparation via in situ solution polymerization. The swelling behavior, mechanical properties and thermal stability of the prepared C n VIM crosslinked PAAM hydrogels are investigated.

    Get Price
  • Comparison of the thermal stabilities of reverse ...

    Reverse transcriptases (RTs) from avian myeloblastosis virus (AMV) and Moloney murine leukaemia virus (MMLV) have been most extensively used as a tool for conversion of RNA to DNA. In this study, we compared the thermal stabilities of AMV RT and MMLV RT by observing their irreversible thermal inacti …

    Get Price
  • Thermal and rheological properties of cellulose-graft ...

    In order to prepare a cellulose-based water absorbent material in an environmentally-friendly way, a cellulose-graft-polyacrylamide (cellulose-g-PAM) copolymer is synthesized by in situ graft copolymerization through a co-rotating twin-screw extruder.An ionic liquid, namely 1-N-butyl-3-methylimidazolium chloride, is used as the reaction medium and ceric ammonium nitrate is used as …

    Get Price
  • Engineering thermal stability of L-asparaginase by in ...

    L-asparaginase (EC 3.5.1.1, L-ASNase) catalyses the hydrolysis of l-Asn, producing L-Asp and ammonia. This enzyme is an anti-neoplastic agent; it is used extensively in the chemotherapy of acute lymphoblastic leukaemia. In this study, we describe the use of in vitro directed evolution to create a new enzyme variant with improved thermal stability.

    Get Price
  • Real-time Particle Size Analysis Using the Focused

    2019-7-12 · Thermal analyses of alumina and polyacrylamide–alumina composites proved that the thermal stability of the later sample increased compared to neat filler particles, further supporting that the nature of both samples were completely different.

    Get Price
  • An electrically conductive

    2021-3-1 · A hydrogel composite that consists of micrometre-sized silver flakes suspended in a polyacrylamide–alginate hydrogel matrix exhibits a high electrical …

    Get Price
  • Polyacrylamide,PAM,CH2CHCONH2 by Guizhou Viton

    Polyacrylamide is a line type high molecular polymer, its formula is (CH2CHCONH2)n, and abbreviation is PAM. Polyacrylamide can be dissolved in the water easily; however, it is very difficult to dissolve in the general organic solvents, such as benzene, aether, esters and propanone etc. The aqueous solution of PAM is a non-dangerous, viscous ...

    Get Price
  • Polyacrylamide crosslinked by bis-vinylimidazolium

    2019-9-3 · A series of ionic compounds 1,n-dialkyl-3,3′-bis-l-vinylimidazolium bromide (C n VIM) are prepared and employed to crosslink acrylamide for polyacrylamide (PAAM) hydrogel preparation via in situ solution polymerization. The swelling behavior, mechanical properties and thermal stability of the prepared C n VIM crosslinked PAAM hydrogels are investigated.

    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
  • 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 ...

    Get Price
  • Thermal and rheological properties of cellulose-graft ...

    In order to prepare a cellulose-based water absorbent material in an environmentally-friendly way, a cellulose-graft-polyacrylamide (cellulose-g-PAM) copolymer is synthesized by in situ graft copolymerization through a co-rotating twin-screw extruder.An ionic liquid, namely 1-N-butyl-3-methylimidazolium chloride, is used as the reaction medium and ceric ammonium nitrate is used as …

    Get Price
  • Experimental analyses and molecular simulation of the ...

    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.

    Get Price
  • Preparation and solution properties of polyacrylamide ...

    Drag reducers (DRs) have a significant effect on shale hydraulic fracturing. Hence, it is very essential to develop excellent DRs for engineering applications. In this work, a novel nanocomposite drag reducer (PASD-SiO2) was synthesized using acrylamide (AM), sodium 4-styrenesulfonate (SSS), dimethylhexadeyl Polymers in liquid formulations

    Get Price
  • Onset Kinetics of Thermal Degradation of Ultrathin ...

    2021-3-12 · There are several pathways through which a polymer can degrade such as thermal, photoinduced, biological, chemical and mechanical. 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 …

    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
  • Cationic Polyacrylamide Less Price High Purity Fast

    Company Registration: US DUNS Number: 07-930-0068. UK DUNS Number: 222811 636. NAICS: 326150. UK VAT: 265649761. India GST: 03AABCI9814Q1Z6

    Get Price
  • An electrically conductive

    2021-3-1 · A hydrogel composite that consists of micrometre-sized silver flakes suspended in a polyacrylamide–alginate hydrogel matrix exhibits a high electrical …

    Get Price
  • Polyacrylamide - Stability

    Stability In dilute aqueous solution, such as is commonly used for Enhanced Oil Recovery applications, polyacrylamide polymers are susceptible to chemical, thermal, and mechanical degradation. Chemical degradation occurs when the labile amine moiety hydrolyzes at elevated temperature or pH, resulting in the evolution of ammonia and a remaining ...

    Get Price
  • 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:

    Get Price
  • cas number: 900 thermal stability and solubility of ...

    Preparation and thermal study of polymers derived. Polyacrylamide (PAA) and some of its N-alkyl substituted derivatives have been synthesised and characterised using thermal analysis.Thermal stability was studied by thermogravimetry (TG) and differential scanning calorimetry (DSC) was used to determine the glass transition temperatures (T g).The results showed an increase in degradation ...

    Get Price
  • pam/polyacrylamide pam good thermal stability

    pam/polyacrylamide pam good thermal stability chemicals for south korea market Polyacrylamide (PAM) Market - Global Industry Analysis Growing demand for the product in other industrial applications such as mineral processing, coal washing, metallurgy, electronic industry and iron and steel is expected to provide growth opportunities for ...

    Get Price
  • Theoretical studies of hydrolysis and stability of ...

    Polymer degradation and stability 2015 v.121 pp. 69-77 ISSN: 0141-3910 Subject: acrylic acid, ... pH, polyacrylamide, quantum mechanics, thermal stability, water solubility Abstract: ...

    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 ...

    Get Price
  • Nonionic Polyacrylamide Available Top Quality at Best

    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.

    Get Price
  • Experimental analyses and molecular simulation of the ...

    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
  • Synthesis and properties of polyacrylamide by ...

    2018-8-23 · Study on purification technology of polyacrylamide wastewater by non-thermal plasma[J]. Plasma Sci. Technol., 2019, 21(5): 54008-054008. Junfeng RONG (荣俊锋), Kaixun ZHU (朱凯勋) and Minggong CHEN (陈明功). Study on purification technology of

    Get Price
  • 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

    Get Price
  • Stability of Partially Hydrolyzed Polyacrylamides at ...

    2009-12-17 · At elevated temperatures in aqueous solution, partially hydrolyzed polyacrylamides (HPAMs) experience hydrolysis of amide side groups. However, in the absence of dissolved oxygen and divalent cations, the polymer backbone can remain stable so that HPAM solutions were projected to maintain at least half their original viscosity for more than 8 years at 100°C and for approximately 2 …

    Get Price
  • The thermal gelation behavior and performance

    2020-7-14 · The thermal gelation behavior and performance evaluation of High Molecular Weight Nonionic Polyacrylamide and Polyethyleneimine mixtures for indepth Water Control in Mature Oilfields Yi Qin 1, Ruiquan Liao 2, Shunshe Luo 1,*, and Junliang Li 2 1 Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan, 430100,

    Get Price
  • 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 ...

    Get Price
  • Evaluation of High Molecular Weight Nonionic ...

    2020-9-17 · model of gelation time, and the compatibility, microstructure, thermal stability, and plugging capacity of this gel system were evaluated for water control treatment. 2. Materials and Methods 2.1. Materials The nonionic polyacrylamide (NPAM) was purchased from Guangzhou Shuirun Chemical

    Get Price
  • Polyacrylamide Grafted Xanthan: Microwave-Assisted ...

    2021-5-5 · Polyacrylamide Grafted Xanthan: Microwave-Assisted Synthesis and Rheological Behavior for Polymer Flooding Souheyla Chami 1, ... than is restricted in high temperature reservoirs due to its weak thermal stability [16]. To improve rheology of these polymers, …

    Get Price
  • The effects of SiO2 nanoparticles on the thermal

    Abstract The primary objective of this study is to investigate the effects of SiO2 nanoparticles on improving the rheological behavior and inhibition of the thermal degradation of hydrolyzed polyacrylamide (HPAM) solutions. The SiO2-HPAM interactions were evaluated through i) Polymer adsorption onto nanoparticles, ii) rheological studies, and iii) evaluation of thermal stability in presence or ...

    Get Price
  • Rheological Behavior of Ferrocene-modified

    A redox polymer ferrocene-modified polyacrylamide( PAM-Fc) was prepared by using 'postmodification' technology to modify polyacrylamide with grafted ferrocene functional groups in alkylation reaction in dimethyl sulfoxide directly. Chemical structure,electrochemical activity and rheological properties of PAM-Fc in aqueous solutions were investigated respectively.

    Get Price
  • Nonionic Polyacrylamide Available Top Quality at Best

    2020-5-16 · Polyacrylamide (PAM) is usually obtained by free radical polymerization of acrylamide (AM) and in its partially hydrolysed form is a synthetic straight-chain polymer of acrylamide monomers, some of which have been hydrolysed (figure 1) [1,2,3,4].

    Get Price
  • Stability of Partially Hydrolyzed Polyacrylamides at ...

    2009-12-17 · At elevated temperatures in aqueous solution, partially hydrolyzed polyacrylamides (HPAMs) experience hydrolysis of amide side groups. However, in the absence of dissolved oxygen and divalent cations, the polymer backbone can remain stable so that HPAM solutions were projected to maintain at least half their original viscosity for more than 8 years at 100°C and for approximately 2 …

    Get Price
  • [Stabilization of polyacrylamide gel immobilized ...

    [Catalytic properties and stability of horseradish peroxidase immobilized in polyacrylamide gel] Ugarova NN, Kershengol'ts BM, Artamonov ID, Berezin IV. Biokhimiia, 41(9):1662-1670, 01 Sep 1976 Cited by: 1 article | PMID: 10016

    Get Price
  • Nonionic Polyacrylamide Available Top Quality at Best

    PDFlib PLOP: PDF Linearization, Optimization, Protection Page inserted by evaluation version www.pdflib.com – [email protected] Stability of Immobilized Penicillin Acylase under Reactive Conditions' ANDRES ILLANES, CLAUDIA ALTAMIRANO, AND ANDREA RUIZ School of Biochemical Engineering zy zyxw zyxw Universidad Catolica de Valparai'so Valparaiso, Chile INTRODUCTION Thermal …

    Get Price
  • (PDF) Stability of Immobilized Penicillin Acylase under ...

    Testing of Thermal Long-Term Stability It is known that proteins are sensitive to heat treatment, especially in relation to long-term stability and activity [ 29 ]. In this study, thermal stability of nisin products was observed during storage (up to 165 days) at four different temperatures representing conditions of production (−18°C ...

    Get Price
  • Isolation and Thermal Stabilization of Bacteriocin Nisin ...

    2019-12-12 · Simultaneous thermal analysis of cationic, nonionic and anionic polyacrylamide. Annett Steudel. Annett Steudel. Affiliations. Ruhr Universität Bochum (RUB), Chair of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Universitätsstraße 150, 44780, Bochum, Germany. Search for articles by this author.

    Get Price
  • Simultaneous thermal analysis of cationic, nonionic

    2013-8-26 · 2009 a thesis title chemical studies and sorption behavior of some hazardous metal ions on polyacrylamide stannic (iv) molybdophosphate as 'organic – inorganic' composite cation – exchanger

    Get Price
  • CHEMICAL STUDIES AND SORPTION BEHAVIOR OF

    2016-5-18 · thermal stability, solutions (5% w/v) of hydrolysates and SPI were subjected to heat treatment at 95°C for 60 min followed by centrifugation and determination of protein content in the supernatant using a nitrogen analyzer. Solubility and thermal stability at different protein concentrations (1%, 2.5%, 5%, and 7%) in a black tea beverage

    Get Price
  • SOY PROTEIN HYDROLYSATE; SOLUBILITY, THERMAL

    Changes in mechanical properties, thermal stability, reducible cross-links and glycosyl-lysines in rat skin induced by corticosteroid treatment. Oxlund H, Sims T, Light ND. The effects of systemic cortisol treatment on the biophysical and biochemical properties of skin were investigated.

    Get Price