Oxidative polymerization of 2,6-dimethylphenol to form poly(2,6-dimethyl-1,4-phenylene oxide) in water through one water-soluble copper(II) complex of a zwitterionic calix[4]arene

2012 ◽  
Vol 50 (23) ◽  
pp. 4864-4870 ◽  
Author(s):  
Li-Min Wan ◽  
Hong-Xi Li ◽  
Wei Zhao ◽  
Hong-Ye Ding ◽  
Yang-Yang Fang ◽  
...  
Keyword(s):  
Oxidative Polymerization ◽  
Water Soluble ◽  
Phenylene Oxide

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.

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

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..

Catalytic Cu(II)−Amine Terminated Poly(amidoamine) Dendrimer Complexes for Aerobic Oxidative Polymerization To Form Poly(2,6-dimethyl-1,4-phenylene oxide) in Water

2010 ◽  
Vol 43 (4) ◽  
pp. 1695-1698 ◽  
Author(s):  
Cheng Gu ◽  
Ke Xiong ◽  
Baoqing Shentu ◽  
Wenli Zhang ◽  
Zhixue Weng
Keyword(s):  
Oxidative Polymerization ◽  
Phenylene Oxide

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.

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