A water-soluble eumelanin polymer with typical polyelectrolyte behaviour by triethyleneglycol N-functionalization

2015 ◽  
Vol 3 (12) ◽  
pp. 2810-2816 ◽  
Author(s):  
Stefania R. Cicco ◽  
Marianna Ambrico ◽  
Paolo F. Ambrico ◽  
Maurizio Mastropasqua Talamo ◽  
Antonio Cardone ◽  
...  
Keyword(s):  
Oxidative Polymerization ◽  
Water Soluble

Oxidative polymerization of 5,6-dihydroxyindole N-functionalized with TEG chains as a new route to water-soluble eumelanin-like materials..

Highly Conjugated, Water-Soluble Polymers via the Direct Oxidative Polymerization of Monosubstituted Bithiophenes

1998 ◽  
Vol 31 (3) ◽  
pp. 933-936 ◽  
Author(s):  
Seth C. Rasmussen ◽  
Jason C. Pickens ◽  
James E. Hutchison
Keyword(s):  
Oxidative Polymerization ◽  
Water Soluble ◽  
Water Soluble Polymers ◽  
Soluble Polymers

scholarly journals Oxidative polymerization of acrylamide in the presence of thioglycolic acid

2005 ◽  
Vol 3 (4) ◽  
pp. 705-720 ◽  
Author(s):  
Cemal Özeroğlu ◽  
Sacide Erdoğan
Keyword(s):  
Molecular Weight ◽  
Thioglycolic Acid ◽  
Graphite Furnace ◽  
Oxidative Polymerization ◽  
Monomer Concentration ◽  
Water Soluble ◽  
Polymerization Reaction ◽  
Molar Ratio ◽  
Polymerization Time ◽  
Redox Systems

AbstractChemical polymerization of acrylamide at room temperature was examined by using thioglycolic acid-cerium (IV) sulfate and thioglycolic acid-KMnO4 redox systems in acid aqueous medium. Water soluble polyacrylamides containing thioglycolic acid end groups were synthesized. The effects of the molar ratio of acrylamide to Ce(IV) nAAm/nCe(IV), the polymerization time, the temperature, the monomer concentration, the molar ratio of cerium (IV) sulfate to thioglycolic acid and the concentration of sulfuric acid on the yield and molecular weight of polymer were investigated. Lower molar ratios of acrylamide/Ce(IV) at constant monomer concentration resulted in an increase in the yield but a decrease in molecular weight of polymer. The increase of reaction temperature from 20 to 70°C resulted in a decrease in the yield but generally resulted in a constant value for the molecular weight of polymer. With increasing polymerization time, the yield and molecular weight of polymer did not change substantially. Ce(IV) and Mn(VII) ions are reduced to Ce(III) and Mn(II) ions respectively in the polymerization reaction. The existence of Ce(III) ion bound to polymer was investigated by UV-visible spectrophotometry and fluoresce measurements. The amount of Mn(II) incorporated into the polymer was determined using graphite furnace atomic absorption spectrometry. The mechanism of this phenomenon is discussed.

Synthesis of Polyaniline Using Electrostatically Layered Hematin Assemblies

2001 ◽  
Vol 708 ◽  
Author(s):  
Bon-Cheol Ku ◽  
Soo-Hyoung Lee ◽  
Wei Liu ◽  
Jayant Kumar ◽  
Ferdinando F. Bruno ◽  
...  
Keyword(s):  
Thin Film ◽  
Horseradish Peroxidase ◽  
Oxidative Polymerization ◽  
Polymerization Rate ◽  
Water Soluble ◽  
Composite Thin Film ◽  
Layer By Layer ◽  
Polystyrene Sulfonate ◽  
Conductive Polyaniline ◽  
Multilayer Assemblies

ABSTRACTThe enzyme horseradish peroxidase has been recently used for the polymerization of water-soluble conductive polyaniline. Hematin, an ironporphyrin molecule that catalyzes the oxidative polymerization of aniline and phenol, is a robust and inexpensive biomimetic alternative to horseradish peroxidase. Composite thin film assemblies were fabricated by electrostatic layer-by-layer (ELBL) alternate deposition of a polyelectrolyte, poly(dimethyl diallylammonium chloride), and hematin. These multilayer assemblies were then used for the polymerization of aniline in the presence of a polystyrene sulfonate as a template. It was found that the polymerization rate depends on both pH and the concentration of hematin deposited and the polyaniline synthesis was possible both onto the ELBL surfaces and in solution. It was also discovered that it is possible to reuse the ELBL assembled hematin substrates for multiple aniline polymerizations.

scholarly journals Impervious Nature of Al2O3-PANI Composite Against Corrosion on Mild Steel in Strong Acidic Environment

2018 ◽  
Vol 34 (4) ◽  
pp. 1832-1841 ◽  
Author(s):  
P. Kamatchi Selvaraj ◽  
S. Sivakumar ◽  
S. Selvaraj
Keyword(s):  
Mild Steel ◽  
Sodium Salt ◽  
Potentiodynamic Polarization ◽  
Oxidative Polymerization ◽  
Gravimetric Method ◽  
Water Soluble ◽  
Continuous Exposure ◽  
Acidic Environment ◽  
Pani Composite ◽  
Prepared Composite

Solubility problem of composite in aqueous medium is resolved on adding Al2O3 during the oxidative polymerization of aniline using ammonium peroxydisulphate as an oxidant and sodium salt of dodecyl bezenesulphonic acid as surfactant and dopant at 273 K temperature. The yielded water soluble Al2O3-PANI composite is confirmed by comparing the FTIR, XRD and SEM recorded spectra with previously reported one. Gravimetric method exposes that the prepared composite is having confrontation against corrosion. Only a slight change in efficiency on continuous exposure up to eight hours is observed. OCP data are transformed in to potential graph to exposes the invincibility of the composite against corrosion. Measurement of potentiodynamic polarization and EIS studies also confirms the defiance against corrosion.

1,4,7-Tricarboxymethyl-1,4,7-triazacyclononane Copper Catalyzed Oxidative Polymerization to Form Poly(2,6-dimethyl-1,4-phenylene oxide) in Water

2010 ◽  
Vol 63 (3) ◽  
pp. 502 ◽  
Author(s):  
Sweta Pant ◽  
Milton T. W. Hearn ◽  
Kei Saito
Keyword(s):  
Catalytic System ◽  
Oxidative Polymerization ◽  
Water Soluble ◽  
Polymerization Process ◽  
Alkaline Water ◽  
Phenylene Oxide ◽  
Soluble Ligand

The copper(II) complex of the water soluble ligand 1,4,7-tricarboxymethyl-1,4,7-triazacyclononane has been employed as a catalyst for the oxidative polymerization of 2,6-dimethylphenol using alkaline water as the solvent. With this catalytic system, the polymer, poly(2,6-dimethyl-1,4-phenylene oxide), was successfully obtained with suppression of the formation of the quinone by-product, 4-(3,5-dimethyl-4-oxo-2,5-cyclo-hexadienylidene)-2,6-dimethyl-2,5-cyclohexadienone, during the polymerization process.

scholarly journals Synthesis and characterization of cyclodextrin-based acrylamide polymer flocculant for adsorbing water-soluble dyes in dye wastewater

2020 ◽  
Vol 7 (1) ◽  
pp. 191519
Author(s):  
Qiong Su ◽  
Yuxing Wang ◽  
Wanhong Sun ◽  
Junxi Liang ◽  
Shujuan Meng ◽  
...  
Keyword(s):  
Oxidative Polymerization ◽  
Water Soluble ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Dye Wastewater ◽  
Effects Of Ph ◽  
Order Kinetic Model ◽  
Langmuir Isotherm Model ◽  
Polymer Flocculant ◽  
Adsorption Desorption

A novel hydrophobic and cationic cyclodextrin-based acrylamide flocculant (AM-β-CD-DMDAAC) was prepared by chemical oxidative polymerization to adsorb water-soluble dyes in dye wastewater. Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope and thermogravimetric (TG) measurements results demonstrated that the AM-β-CD-DMDAAC was successfully synthesized. The effects of pH, contact time, initial dye concentration, temperature and adsorbent dose on dye removal efficiency for AM-β-CD-DMDAAC flocculants were investigated. The kinetic data were found to follow the pseudo-second-order kinetic model. The equilibrium adsorption data were fitted to the Langmuir isotherm model, with the maximum adsorption capacity of 147.1 mg g −1 . The adsorbent retained about 60% of the adsorption efficiency after three adsorption/desorption cycles, which implied a promising application as the dye adsorbent.

Synthesis and self-assembly of water-soluble polythiophene-graft-poly(ethylene oxide) copolymers

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 21830-21839 ◽  
Author(s):  
Mohamed Gamal Mohamed ◽  
Chih-Chia Cheng ◽  
Yung-Chih Lin ◽  
Cheng-Wei Huang ◽  
Fang-Hsien Lu ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Click Chemistry ◽  
Self Assembly ◽  
Oxidative Polymerization ◽  
Water Soluble ◽  
Random Copolymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Poly(3-hexylthiophene)-graft-poly(ethylene oxide) (P3HT-g-PEO) rod–coil conjugated random copolymers through oxidative polymerization with FeCl3 and facile click chemistry.

Colorimetric sensing of non-ionic and cationic surfactants using a versatile anionic poly(3,4-propylenedioxythiophene) derivative

2015 ◽  
Vol 7 (6) ◽  
pp. 2800-2805 ◽  
Author(s):  
Xiaoming Chen
Keyword(s):  
Aqueous Solutions ◽  
Cationic Surfactants ◽  
Oxidative Polymerization ◽  
Colorimetric Sensor ◽  
Water Soluble ◽  
Colorimetric Sensing ◽  
Soluble Poly

A novel anionic water-soluble poly(3,4-propylenedioxythiophene) derivative (WSPProDOT) has been prepared by FeCl3 oxidative polymerization with a subsequent post-polymerization defunctionalization process, and applied as a colorimetric sensor to determine and discriminate non-ionic and cationic surfactants in aqueous solutions.

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