Alkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties
Alkaline Hydrolysis of Polyacrylamide and Study on P(AAn,-Co-NaAc) .Properties appropriate Mw and charge density it can be used as a strong flocculent for waste-water treatment. It is seen from published papers that PHPA is one of the most
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Alkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties
The hydrolysis of polyacrylamide up to 10 and 60% degrees was facilitated in suitable amount of different alkalines. The degree of hydrolysis of samples was determined by a back titration method.
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[PDF] Alkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties | Semantic Scholar
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
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CiteSeerX — Alkaline hydrolysis of polyacrylamide and study on poly(acrylamideco-sodium acrylate) properties
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. The intrinsic viscosity
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Alkaline Hydrolysis of Polyacrylamide - ResearchGate
Imide compounds were identified as peaks in the 13 C spectra in the 177 ppm region and Table 5 shows their content. Cyclic imide compounds form as a result of alkaline hydrolysis of polyacrylamide
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Alkaline and acid hydrolysis of polyvinylamides - Moens - 1957 - Journal of Polymer Science Part A: Polymer Chemistry - Wiley Online Library
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
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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
Get PricePreparation of Anionic Flocculant by Alkaline Hydrolysis of Polyacrylamide (Praestol 2500) in Aqueous Solutions and Its Use for Water Treatment
A study was made of the low-temperature hydrolysis of high-moleculer-weight polyacrylamide Praestol under the action of NaOH in dilute aqueous solution. The performance of the hydrolyzed and nonhydrolyzed polymer when combined with aluminum
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CiNii 論文 - Study on alkaline hydrolysis of polyacrylamide by 13C 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 sequence distribution of the hydrolyzed products.
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Alkaline and acid hydrolysis of polyvinylamides - Moens - 1957 - Journal of Polymer Science - Wiley Online Library
In the case of polyacrylamide (PAA), hydrolysis enhances an uncoiling of the polymeric chain when the degree of conversion reaches about 40%. Therefore the reaction is characterized by two different steps, a first, rapid step analogous to the
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(DOC) Impact of salts on polyacrylamide hydrolysis and gelation: New insights | Ibnelwaleed Hussein - Academia.edu
Hydrolysis of Polyacrylamide The DH plays a major role in the thermal instability of polymeric gels. At the same time, adding retarders (salts) is very important to extend the gelation time to allow for successful and safe gel placement in the
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Hydrolysis of cationic polyacrylamide and its effect on flocculation of ground calcium carbonate :: BioResources
This study evaluated the effect of the hydrolysis of C-PAM on the flocculation of GCC by understanding the adsorption behaviour of C-PAM under neural and alkaline conditions. To investigate the flocculation effect of polymeric flocculants, as
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Chemical and Photolytic Degradation of Polyacrylamides Used in Potable Water Treatment - USF Scholar Commons
Figure 2.2 Acidic hydrolysis of polyacrylamide 9 Figure 2.3 Alkaline hydrolysis of polyacrylamide 9 Figure 3.1 Diagram of the experiment design 21 Figure 4.1 Decrease in permanganate residual after of 10 mg/L Clarifloc C-3280 (KMnO 4 dose at 6
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Evaluation of a pH-responsive guar gum-based hydrogel as adsorbent for cationic dyes: kinetic and modelling study
vacuum (60 mmHg) overnight and used for modification by alkaline hydrolysis. Preparation of modified guar gum–polyacrylamide network polymer (mGG-PAAm) To 0.5 g of dry GG-PAAm, 1 M NaOH (20 mL) was added and the mixture was maintained at 90
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Chemical and Photolytic Degradation of Polyacrylamides Used in Potable Water Treatment - USF Scholar Commons
Figure 2.2 Acidic hydrolysis of polyacrylamide 9 Figure 2.3 Alkaline hydrolysis of polyacrylamide 9 Figure 3.1 Diagram of the experiment design 21 Figure 4.1 Decrease in permanganate residual after of 10 mg/L Clarifloc C-3280 (KMnO 4 dose at 6
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(217ay) Effect of Salts On Polyacrylamide Hydrolysis and Cross-Linking With Polyethylenimine At Elevated Temperatures | AIChE
PAM undergoes alkaline hydrolysis at high temperatures producing partially hydrolyzed polyacrylamide and ammonia. In this study, the effect of salts on the degree of hydrolysis was investigated. The data obtained from 13 C NMR showed that salts
Get PriceSynthesis and evaluation of partially hydrolysed polyacrylamide (PHPA) as viscosifier in water based drilling fluids
ly clear and highly viscous. Polyacrylamide so ob-tained was isolated by precipitating in methanol. dried in vacuum oven for 5-6 h at 60 C. About 80-85% polymer was obtained. Alkaline hydrolysis of the polymer was then performed using 2% so
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Hidrolisis Alcalina Poliacrilamida | Polymers | Hydrolysis | Prueba gratuita de 30 días | Scribd
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,
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(PDF) Effect of different electrolytes on the swelling properties of calyx[4]pyrrole-containing polyacrylamide membranes | Silvia Patachia
The effect of alkaline hydrolysis of polaycrylamide-based hydrogels was also studied. The hydrolysed hydrogels collapse in the pres- ence of the electrolytes; this behavior is dependent on the hydrolysis degree, electrolyte charge and
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Effect of acid and alkaline hydrolysis on the concentrations of albumin and globulin in Thevetia peruviana seed cake protein extract
Native polyacrylamide gel electrophoresis analysis of albumin oligomer by Marcone and co workers9 showed that the fraction was susceptible to and did undergo alkaline pH – induced hydrolysis. The same type of hydrolysis was reported Yada12
Get PricepH-responsive interpenetrating network hydrogel beads of poly(acrylamide)-g-carrageenan and sodium alginate for intestinal targeted drug delivery
In the present work, we synthesized pH-responsive interpenetrating network (IPN) hydrogel beads of polyacrylamide grafted κ-carrageenan (PAAm-g-CG) and sodium alginate (SA) for targeting ketoprofen to the intestine. The PAAm-g-CG was synthesized
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EFFECT OF INTERACTIONS BE'lWEEN SULFONATED POLYACRYLAMlliE AND SODIUM DODECYLSULFONATE- DODECYLAMINE HYDROCHLORlliE ON ADSORPTION
The anionic polyacrylamide (PAMS) employed in this study contains 3 mol% of sulfonated groups; existence of some -COOH groups also cannot be ruled out. Under alkaline pH conditions, dissociation of the -COOH groups already present and formation
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Polyacrylamide
Polyacrylamide (IUPAC poly(2-propenamide) or poly(1-carbamoylethylene), abbreviated as PAM) is a polymer (-CH 2 CHCONH 2-) formed from acrylamide subunits. It can be synthesized as a simple linear-chain structure or cross-linked, typically using
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PEER-REVIEWED ARTICLE bioresources
2013). In this study, a streaming current detector was used to examine the hydrolysis of C-PAM under neutral and alkaline conditions, by measuring the decrease in charge density caused by hydrolysis. Ion chromatography was used to confirm the
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