Polyacrylamide degradation and its implications in … – Nature
The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as in soil conditioning. 1,9,12,21 …
Synthesis of new polyacrylamide emulsion and its application ,The new polyacrylamide emulsion, also known as “water-in-water” type polyacrylamide emulsion, synthesized by the dispersion polymerization method, has the advantages of fast dissolution, easy use in the field, and being friendly to the environment. Indoor tests have shown that this emulsion can be fully dissolved within 15 min at room temperature.
Fabricating an anionic polyacrylamide (APAM) with an anionic
Fabricating an anionic polyacrylamide (APAM) with an anionic block structure for high turbidity water separation and puri?cation? Li Feng, ab Huaili Zheng,*ab Baoyu Gao,c Shixin Zhang,ab Chuanliang Zhao,ab Yuhao Zhouab and Bincheng Xuab Ultraviolet (UV)-initiated template polymerization (UTP) was used as a feasible strategy to prepare a …
Synthesis and Characterization of Acrylamide-Based Anionic ,The copolymer of acrylamide (AM) and 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) was synthesized through radical solution polymerization by potassium persulfate as initiator. By changing the AMPS feed ratio from 10 to 70%, and keeping other reaction conditions constant, different copolymers were synthesized. The techniques of Fourier transform infrared (FTIR) and nuclear magnetic …
Preparation of poly (acrylamide-co-acrylic acid) aqueous
During dispersion polymerization of the water-soluble monomers in the aqueous salt medium, usually a high in-process viscosity can be observed, which has been reported by Chen et al. [33]. When the salt concentration is below 6.2 wt%, the resultant polymer cannot be phase separated because of the poor salting-out effect, leading to the …
Synthesis of High Molecular Weight Water-Soluble Polymers as ,We report the synthesis of sterically-stabilized diblock copolymer particles at 20% w/w solids via reversible addition–fragmentation chain transfer (RAFT) aqueous dispersion polymerization of N,N′-dimethylacrylamide (DMAC) in highly salty media (2.0 M (NH4)2SO4). This is achieved by selecting a well-known zwitterionic water-soluble polymer, poly(2-(methacryloyloxy)ethyl phosphorylcholine …
Best Practices Guidance for the Use of Anionic Polyacrylamide
? Properly selected and application of anionic PAM is key. ? Anionic PAM should be selected, applied and otherwise handled based on manufacturer recommendations. ? Residual AMD in manufactured PAMs should be below threshold set by the U.S. EPA for drinking water treatment: 0.05% Literature Findings Toxicity
Polyacrylamide CAS#: 9003-05-8 – ChemicalBook,Protein polyacrylamide gel electrophoresis: (1)The basic principle of SDS denaturing in-continuous polyacrylamide gel electrophoresis is based on differences in the molecular weight of the protein, SDS is an anionic surfactant, capable of binding with the hydrophobic portion of the protein thus making the protein bring a large number of anions …
Dispersion Polymerization of Acrylamide | Langmuir
Dispersion polymerization of anionic polyacrylamide in an aqueous salt medium. Petroleum Science 2010, 7 (3) , 410-415. DOI: 10.1007/s12182-010-0086-9. Jianbo Tan, Bo Wu, Jianwen Yang, Yedan Zhu, Zhaohua Zeng.
A cost-effective anionic flocculant prepared by grafting ,How to efficiently utilize most abundant biomass of cellulose, lignin and their derivatives has become an emerging challenge as the anticipative oil depletion. In this paper, the ternary anionic copolymer of carboxymethyl cellulose-acrylamide-lignosulfonate (CAL) was successfully prepared by hydrothermal polymerization. Based on the flocculation characteristics of cationic methylene blue, the …