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2013-12-24 · P(AM-DAC-BA) was synthesized through copolymerization of acrylamide (AM), acryloyloxyethyl trimethyl ammonium chloride (DAC), and butylacrylate (BA) under ultraviolet (UV) initiation using response surface methodology (RSM). The influences of light intensity, illumination time, and photoinitiator concentration on the intrinsic viscosity [η] of ...
Get Price2019-4-23 · Synthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by chain extension of acrylamide (AM) homopolymer blocks via RAFT polymerization is a promising approach for engineering high-performance CPAMs. However, the aqueous solution polymerization of AM usually leads to high viscosity, thus limiting the solid content in the polymerization …
Get Price2021-7-13 · Abstract. A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in aqueous ammonium sulfate ( (NH4)2SO4) solution. The polymerization was initiated by tert-butyl hydroperoxide (TBHP) and ferrisulfas (FeSO4) using ...
Get PriceUV-Initiated Polymerization of Cationic Polyacrylamide: Synthesis, Characterization, and Sludge Dewatering Performance Huaili Zheng , 1 Yongjun Sun , 1 , * Xiaomin Tang , 1 Mingzhuo Tan , 2 Jiangya Ma , 1 Wei Chen , 1 and Yong Liao 1
Get Price2019-12-12 · The interaction between cellulose fibers in the presence of cationic polyacrylamide (CPAM) was analyzed by rheology as a function of polyelectrolyte concentration, charge density, and …
Get PriceP (AM-DAC-BA) was synthesized through copolymerization of acrylamide (AM), acryloyloxyethyl trimethyl ammonium chloride (DAC), and butylacrylate (BA) under ultraviolet (UV) initiation using response surface methodology (RSM). The influences of light intensity, illumination time, and photoinitiator concentration on the intrinsic viscosity of P ...
Get Price2009-1-30 · Polymerization conditions: terpolymer concentration 0.05 wt.%, pH = 3.0, monomers concentration 36 wt.%, cationic degree 12%, photo-initiators …
Get Price2021-5-15 · CPAM is mainly prepared by polymerization of AM and cationic monomer. Acryloxy trimethylammonium chloride (DAC) is one of the more commonly used cationic monomers. The flocculant copolymerized of AM and DAC has been widely synthesized …
Get Price2021-7-13 · Full Article. A CATIONIC POLYACRYLAMIDE DISPERSION SYNTHESIS BY DISPERSION POLYMERIZATION IN AQUEOUS SOLUTION. Yufeng Wang, a,b, * Kefu Chen, a Lihuan Mo, a,* and Huiren Hu c A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization …
Get PriceUV-Initiated Polymerization of Cationic Polyacrylamide: Synthesis, Characterization, and Sludge Dewatering Performance Huaili Zheng , 1 Yongjun Sun , 1 , * Xiaomin Tang , 1 Mingzhuo Tan , 2 Jiangya Ma , 1 Wei Chen , 1 and Yong Liao 1
Get Price2019-12-12 · The interaction between cellulose fibers in the presence of cationic polyacrylamide (CPAM) was analyzed by rheology as a function of polyelectrolyte concentration, charge density, and molecular weight. CPAM was found to strongly influence the yield stress of cellulose suspensions; low doses of CPAM increased the yield stress, but at higher concentrations the yield stress declined. The charge ...
Get Price2009-1-30 · UV-initiated photo-polymerizations had been developed over the last 30 years, owing to their advantages in industrial applications, including adhesives, coatings, inks, varnishes and electronics [1–4].UV curable systems were classified based on the polymerization being either radical or ionic [].Photo-initiated radical polymerizations were well understood and had been investigated for a ...
Get Price2020-1-14 · Key words: Dispersion polymerization, cationic polyacrylamide microspheres, profile modification, permeability reduction Preparation of cationic polyacrylamide microsphere emulsion and its performance for permeability reduction *Corresponding author. email: [email protected] Received February 13, 2014
Get PriceSynthesis of block cationic polyacrylamide precursors using an aqueous RAFT dispersion polymerization†. Bo Huang a, Jie Jiang a, Mutian Kang a, Pingwei Liu * ab, Hailong Sun * c, Bo-Geng Li a and Wen-Jun Wang * ab a State Key Lab of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
Get Price2020-12-30 · Experiment 1: Polymerization of acrylamide in water Aim: (a) To polymerize acrylamide (monomer) in water to polyacrylamide (polymer) by free radical polymerization using a 'redox' pair of initiators. (b) To follow the kinetics of polymerization by monitoring the variation of
Get Price2021-5-15 · The cationic monomers on these microblock segments can be polymerized to form a CPAMD with a new cationic microblock structure. In addition, microwave has mechanical effects such as oscillation, emulsification, and diffusion, which can accelerate the heat and mass transfer process of the reaction system, thus accelerating the reaction rate (Wiesbrock et al. 2004; Hoogenboom and …
Get Price2021-2-26 · Polyacrylamide is a high molecular polymer. Specializing in the treatment of various difficult-to-treat wastewater and the treatment of sludge dewatering. (Sludge dewatering generally uses cationic polyacrylamide) It is widely used in municipal sewage and sludge treatment in the paper-making printing and dyeing industry.
Get Price2017-8-27 · polyacrylamide dispersions contained smooth spherical particles. The dispersions behaved as a Newton fluid and were stable . Dispersion polymerization systems consists of monomer, dispersion medium, stabilizer, and initiator. During dispersion polymerization, the stabilizer combines with the salted-out polymer particles, and then the dispersion is
Get PriceUV-Initiated Polymerization of Cationic Polyacrylamide: Synthesis, Characterization, and Sludge Dewatering Performance Huaili Zheng , 1 Yongjun Sun , 1 , * Xiaomin Tang , 1 Mingzhuo Tan , 2 Jiangya Ma , 1 Wei Chen , 1 and Yong Liao 1
Get Price2019-4-23 · Synthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by chain extension of acrylamide (AM) homopolymer blocks via RAFT polymerization is a promising approach for engineering high-performance CPAMs. However, the aqueous solution polymerization of AM usually leads to high viscosity, thus limiting the solid content in the polymerization …
Get PriceCorpus ID: 43686507. A CATIONIC POLYACRYLAMIDE DISPERSION SYNTHESIS BY DISPERSION POLYMERIZATION IN AQUEOUS SOLUTION @article{Wang2011ACP, title={A CATIONIC POLYACRYLAMIDE DISPERSION SYNTHESIS BY DISPERSION POLYMERIZATION IN AQUEOUS SOLUTION}, author={Y. Wang and Kefu Chen and L. Mo and Huiren Hu}, journal={Bioresources}, …
Get Price2019-7-31 · UV-Initiated Polymerization of Cationic Polyacrylamide: Synthesis, Characterization, and Sludge Dewatering Performance HuailiZheng, 1 YongjunSun, 1 XiaominTang, 1 MingzhuoTan, 2 JiangyaMa, 1 WeiChen, 1 andYongLiao 1 Key laboratory of ther ee Gorges Reservoir Region s Eco-Environment, State Ministry of Education, Chongqing University, Chongqing ...
Get PriceKeywords: polymer synthesis, aqueous two-phase polymerization, cationic polyacrylamide, dimethylaminoethyl methacry-late methyl chloride, polyethylene glycol 20000 eXPRESS Polymer Letters Vol.4, No.5 (2010) 275–283 Available online at www.expresspolymlett.com
Get Price2017-10-31 · Cationic polyacrylamide (CPAM) has been the focus of research in environmental engineering field, particularly in sludge dewatering. ... TG/DSC analysis of PAMA-25-15.1 as a function of temperature. 3.2. ... Based on the mechanism of free radical polymerization, the polymerization reaction is partly dependent on collision between the monomer ...
Get Price2019-11-15 · In this study, a novel, highly efficient and environmentally friendly ternary composites flocculant, namely, cationic starch-grafted-cationic polyacrylamide/graphene oxide (CS-g-CPAM/GO), was synthesized by ammonium persulfate initiation polymerization and condensation reaction.
Get Price2020-12-30 · Experiment 1: Polymerization of acrylamide in water Aim: (a) To polymerize acrylamide (monomer) in water to polyacrylamide (polymer) by free radical polymerization using a 'redox' pair of initiators. (b) To follow the kinetics of polymerization by monitoring the variation of
Get Price2014-6-26 · Template Polymerization of a Novel Cationic Polyacrylamide: Sequence Distribution, Characterization, and Flocculation Performance. Industrial & Engineering Chemistry Research 2016 , 55 (37) , 9819-9828.
Get PriceA CATIONIC POLYACRYLAMIDE DISPERSION SYNTHESIS BY DISPERSION POLYMERIZATION IN AQUEOUS SOLUTION Yufeng Wang,a,b,* Kefu Chen,a Lihuan Mo,a,* and Huiren Hu c A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in
Get Price2009-1-30 · Aqueous photo-polymerization of cationic polyacrylamide with hybrid photo-initiators Aqueous photo-polymerization of cationic polyacrylamide with hybrid photo-initiators Wu, Yumin; Zhang, Nana 2009-01-30 00:00:00 In this study, a terpolymer of acrylamide with (2-methacryloyloxyethyl) trimethyl ammonium chloride (DMC) and dimethyldiallylammonium chloride (DMDAAC) as cationic …
Get PriceIn this paper, synthesis of the cationic polyacrylamide P(AM-DAC) was investigated using a novel initiation system, photoirradiation. 2,2′-Azobis(2-amidinopropane) dihydrochloride (V-50) was introduced into the system as the photoinitiator for the polymerization of acrylamide with DAC as the cationic monomer in aqueous solutions.
Get PriceUV-Initiated polymerization of cationic polyacrylamide: synthesis, characterization, and sludge dewatering performance ScientificWorldJournal. 2013 Dec 24;2013:937937. doi: 10.1155/2013/937937. eCollection 2013. Authors Huaili Zheng 1 ...
Get Price2017-10-31 · Cationic polyacrylamide (CPAM) has been the focus of research in environmental engineering field, particularly in sludge dewatering. ... TG/DSC analysis of PAMA-25-15.1 as a function of temperature. 3.2. ... Based on the mechanism of free radical polymerization, the polymerization reaction is partly dependent on collision between the monomer ...
Get PriceKeywords: polymer synthesis, aqueous two-phase polymerization, cationic polyacrylamide, dimethylaminoethyl methacry-late methyl chloride, polyethylene glycol 20000 eXPRESS Polymer Letters Vol.4, No.5 (2010) 275–283 Available online at www.expresspolymlett.com
Get Price2020-12-30 · Experiment 1: Polymerization of acrylamide in water Aim: (a) To polymerize acrylamide (monomer) in water to polyacrylamide (polymer) by free radical polymerization using a 'redox' pair of initiators. (b) To follow the kinetics of polymerization by monitoring the variation of
Get PriceIn order to improve the aqueous solutions viscosity and flocculation performance of cationic polyacrylamide, organic montmorillonite was added into polymerization system of polyacrylamide, the cationic polyacrylamide/dimethyl diallyl ammonium chloride/organic montmorillonite (CPAM/DMDAAC/MMT) nanocomposite was prepared by aqueous two-phase polymerization method.
Get PriceEmulsion polymerization is another important synthesis method polyacrylamide, which is a conventional operation in the dispersed aqueous acrylamide solution in an organic solvent such as gasoline, with vigorous stirring, the solution was uniformly dispersed emulsion system is formed, followed by the addition of acrylamide initiator reaction of polyacrylamide.
Get Price2018-9-7 · High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and …
Get PriceUV-Initiated polymerization of cationic polyacrylamide: synthesis, characterization, and sludge dewatering performance ScientificWorldJournal. 2013 Dec 24;2013:937937. doi: 10.1155/2013/937937. eCollection 2013. Authors Huaili Zheng 1 ...
Get PriceA cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in aqueous ammonium sulfate ((NH4)2SO4) solution.
Get Price2015-9-7 · Cationic polyacrylamide CPAM [ CPAM Properties ] Cationic polyacrylamide CPAM is the water-soluble high polymer or gathers the electrolyte.Because in its molecular chain includes the certain amount polar group,cationic PAM can through the absorbed water in the aerosol solids, causes between the granule the bridging or neutral causes the granule condensation through the electric charge to …
Get Price2020-7-11 · The polymerization reaction creates a high molecular weight polymer or gel. Polyacrylamide: Structure of Repeat Unit: Anionic Polyacrylicamide (APAM) Neutral Polyacrylamide (PAM) Cationic Polyacrylamide (CPAM) COMMERCIAL Polyacrylamides Major manufacturers of acrylamide polymers are BASF, SNF Floerger, Shangdong Tongli , and ...
Get Price2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils. To obtain detailed information on the polymer’s fate in the soil compartment, the degradation of 14C …
Get PriceTemplate Polymerization of a Novel Cationic Polyacrylamide: Sequence Distribution, Characterization, and Flocculation Performance By Zhengan Zhang (526383), Huaili Zheng (649718), Fei Huang (9205), Xiang Li (114679), Shengying He (3106239) and Chun Zhao (208554)
Get PriceThere are 3,991 cationic emulsion polyacrylamide suppliers, mainly located in Asia. The top supplying countries or regions are China, Thailand, and South Africa, which supply 99%, 1%, and 1% of cationic emulsion polyacrylamide respectively. Cationic emulsion polyacrylamide products are most popular in South America, North America, and Africa.
Get Price2003-2-20 · Polyacrylamide and its copolymer containing 6.8 mole % 2-acrylamido-2-methylpropane sulfonic acid were prepared by an irradiation-initiated precipitation polymerization technique. The pol~'Iner was characterized by intrinsic viscosity under conditions similar to …
Get Price2018-4-4 · Polyacrylamide (PAM) Chitosan What is Anionic Polyacrylamide? • High molecular weight, water soluble molecule formed by polymerization of negatively charged acrylamide co-monomer. • PAM aids solid-liquid separation by causing suspended particles to bind and form larger aggregates. • The process is known as polymer bridging.
Get PriceA cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in aqueous ammonium sulfate ((NH4)2SO4) solution.
Get Pricetion of PAM methods and cationic grafting polymerization methods11,12. The modif ica tion methods could obtain r ela tively high molecular weight of cationic polyacrylamide polymer, but which had poor stability, short duration and high price13. Graft polymerization methods could obtain na tural biodegra-
Get Price2003-2-20 · Polyacrylamide and its copolymer containing 6.8 mole % 2-acrylamido-2-methylpropane sulfonic acid were prepared by an irradiation-initiated precipitation polymerization technique. The pol~'Iner was characterized by intrinsic viscosity under conditions similar to …
Get Price2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils. To obtain detailed information on the polymer’s fate in the soil compartment, the degradation of 14C …
Get Pricesynthesis of cationic polyacrylamide by aqueous two-phase polymerization PAN Min1,2,CHEN Da-jun2(1.Sichuan Petroleum Administration Safety and Environment Proctection & Quality Surveillance and Inspection Research Institute,Cuanghau 618300,China;2.College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China)
Get Price1994-5-23 · Pore-size distributions of cationic polyacrylamide hydrogels varying in initial monomer concentration and cross-linker/monomer ratio
Get PriceThere are 3,991 cationic emulsion polyacrylamide suppliers, mainly located in Asia. The top supplying countries or regions are China, Thailand, and South Africa, which supply 99%, 1%, and 1% of cationic emulsion polyacrylamide respectively. Cationic emulsion polyacrylamide products are most popular in South America, North America, and Africa.
Get Price2019-9-4 · 1 Article 2 Preparation, characterization, and sludge 3 conditioning of cationic polyacrylamide synthesized 4 by a novel UV-initiated system 5 6 Qingqing Guan1，*, Guocheng Zhu 2, Yi Liao c, Jin Xu 1, Xiaoxu Sun 1, Fang Tian 1, Jiaxing Xu 1 7 and Minghan Luo 1 8 1 Department of the Environmental Engineering, Nanjing Institute of Technology, 1 Hongjing Avenue,
Get Price2018-4-4 · Polyacrylamide (PAM) Chitosan What is Anionic Polyacrylamide? • High molecular weight, water soluble molecule formed by polymerization of negatively charged acrylamide co-monomer. • PAM aids solid-liquid separation by causing suspended particles to bind and form larger aggregates. • The process is known as polymer bridging.
Get PriceCationic polyacrylamide is a derivative of polyacrylamide, a cationic polymer flocculant which has an excellent effect on sewage treatment. Our existing cationic polyacrylamide are mostly prepared by the Mannich reaction ,which has the shortcomings of more unreacted material, low cationic degree, poor stability, short validity, etc.
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