Study of three different families of water-soluble copolymers: synthesis, characterization and viscoelastic behavior of semidilute solutions of polymers prepared by solution polymerization

Polymer ◽  
2004 ◽  
Vol 45 (6) ◽  
pp. 1993-2000 ◽  
Author(s):  
Enrique J. Jiménez-Regalado ◽  
Gregorio Cadenas-Pliego ◽  
Marissa Pérez-Álvarez ◽  
Yessica Hernández-Valdez
Keyword(s):  
Viscoelastic Behavior ◽  
Water Soluble ◽  
Solution Polymerization ◽  
Semidilute Solutions

scholarly journals Thermoresponsive Poly(N-Isopropylacrylamide-co-Dimethylaminoethyl Methacrylate) Microgel Aqueous Dispersions with Potential Antimicrobial Properties

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 606 ◽  
Author(s):  
Coro Echeverría ◽  
Alejandro Aragón-Gutiérrez ◽  
Marta Fernández-García ◽  
Alexandra Muñoz-Bonilla ◽  
Daniel López
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Agents ◽  
Antimicrobial Properties ◽  
Viscoelastic Behavior ◽  
Water Soluble ◽  
Alkylation Reaction ◽  
Aqueous Dispersions ◽  
Dimethylaminoethyl Methacrylate ◽  
Preliminary Study ◽  
Potential Antimicrobial Activity

The work herein describes the preparation of thermoresponsive microgels with potential antimicrobial properties. Most of the work performed so far regarding microgels with antimicrobial activity, deals with the ability of microgels to carry and release antibiotics or antimicrobial agents (antimicrobial peptides). The originality of this work lies in the possibility of developing intrinsic antimicrobial microgels by copolymerization of the well-known thermoresponsive monomer, N-isopropylacrylamide (NIPAM) with dimethylaminoethyl methacrylate (DMAEMA), a water-soluble monomer, to form microgels via precipitation polymerization (radical polymerization). Due to the presence of a tertiary amine in the DMAEMA comonomer, microgels can be modified by N-alkylation reaction with methyl and butyl iodide. This quaternization confers positive charges to the microgel surfaces and thus the potential antimicrobial activity. The effect of DMAEMA content and its quaternization with both, methyl and butyl iodide is evaluated in terms of thermal and surface charge properties, as well as in the microgel size and viscoelastic behavior. Finally, a preliminary study of the antimicrobial activity against different microorganisms is also performed in terms of minimum inhibitory concentration (MIC). From this study we determined that in contrast with butylated microgels, methylated ones show potential antimicrobial activity and good physical properties besides of maintaining microgel thermo-responsiveness.

Synthesis, Characterization, and Flocculation Properties of Branched Polyacrylamide

2012 ◽  
Vol 476-478 ◽  
pp. 2311-2316 ◽  
Author(s):  
Wei Min Sun ◽  
Guang Cheng Zhang ◽  
He Lin Li ◽  
Dong Dong Li ◽  
Pei Pei Li ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Water Soluble ◽  
The Self ◽  
Solution Polymerization ◽  
Solution Ph ◽  
Water And Wastewater Treatment ◽  
Water And Wastewater ◽  
Acrylamide Monomer ◽  
Clay Suspensions

A water soluble branched polyacrylamide has been synthesized through solution polymerization. The polymerization was initiated by potassium diperiodatocuprate, K5[Cu(HIO6)2](Cu(III)), in alkaline medium and capable of initiating the self condensation vinyl polymerization of acrylamide monomer. The polymer obtained was characterized using Fourier-transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. Its flocculation properties were evaluated with clay suspensions using standard jar tests. The concentration of monomers, concentration of initiators, reaction temperature and solution pH on the influence of intrinsic viscosity and flocculation properties of production were studied. The results demonstrate that the branched polymer can be used as a kind of novel flocculant in water and wastewater treatment.

scholarly journals Synthesis, Characterization, and Flocculation Properties of Branched Cationic Polyacrylamide

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Weimin Sun ◽  
Guangcheng Zhang ◽  
Ling Pan ◽  
Helin Li ◽  
Aihua Shi
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Orthogonal Experiment ◽  
Monomer Concentration ◽  
Water Soluble ◽  
The Self ◽  
Solution Polymerization ◽  
Mass Ratio ◽  
Initiator Concentration ◽  
Single Factor ◽  
Cationic Polyacrylamide

A water soluble branched cationic polyacrylamide (BCPAM) was synthesized using solution polymerization. The polymerization was initiated using potassium diperiodatocuprate, K5[Cu(HIO6)2](Cu(III)), initiating the self-condensing vinyl copolymerization of acrylamide and acryloxyethyltrimethyl ammonium chloride (DAC) monomer. The resulting copolymer was characterized by the use of Fourier-transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. Its flocculation properties were evaluated with standard jar tests of sewage. The effects of initiator concentration, monomer concentration, reaction temperature, and the mass ratio of monomers on intrinsic viscosity and flocculation properties of the product were determined using single-factor experiments and orthogonal experiment.

Viscoelastic Behavior of Aqueous Solutions of Hydrophobically-Modified Water-Soluble Polypeptides

2008 ◽  
Author(s):  
Katsuhiro Inomata ◽  
Tomokazu Takai ◽  
Hideki Sugimoto ◽  
Eiji Nakanishi ◽  
Albert Co ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Viscoelastic Behavior ◽  
Water Soluble ◽  
Hydrophobically Modified

Rheological investigations of water-soluble polysaccharides extracted from Moroccan seaweed Cystoseira myriophylloides algae

2020 ◽  
Vol 11 (3-4) ◽  
pp. 49-63
Author(s):  
Soumia Zaim ◽  
Omar Cherkaoui ◽  
Halima Rchid ◽  
Rachid Nmila ◽  
Reddad El Moznine
Keyword(s):  
Rheological Properties ◽  
Power Law ◽  
Flow Behavior ◽  
Viscoelastic Behavior ◽  
Shear Thinning ◽  
Water Soluble ◽  
Flow Behavior Index ◽  
Dynamic Rheological Properties ◽  
Different Temperatures ◽  
Tan Δ

The rheological properties and spectrum infrared of polysaccharides extracted from Cystoseira myriophylloides algae were investigated in the concentrations range from 3 to 9% (w/v) and at different temperatures. Results of rheological characteristics in a steady shear rate showed pseudoplastic properties and the dynamic rheological properties showed a fluid-like viscoelastic behavior. The flow and viscoelastic characteristics of polysaccharides were described using the power-law (the Ostwald model). The values of flow behavior index of the sample were close to unity (0.91) for 3% and it decreased up to 0.71 for 9% revealing the shear-thinning (pseudoplastic) nature of these polysaccharides. Moreover, the consistency coefficient increased non-linearly with concentration and it was described by a power law. The flow behavior as a function of temperature was satisfactorily described using the Arrhenius law and the activation energy values were extracted. It decreased from 15.68 and 17.21 kJ/mol when the concentration increased from 5 to 9% (w/v). Additionally, in dynamic rheological measurements, tan δ > 1 and G″ > G′ reveling a shear-thinning behavior. Finally, the analysis of the FTIR spectra of these polysaccharides showed the presence of uronic acid groups. This behavior would suggest that polysaccharides extracted from Cystoseira myriophylloides could be an interesting additive as thickeners.

Characterization and rheological properties of dilute-solutions of three different families of water-soluble copolymers prepared by solution polymerization

2004 ◽  
Vol 12 (5) ◽  
pp. 451-458 ◽  
Author(s):  
Enrique Javier Jiménez-Regalado ◽  
Gregorio Cadenas-Pliego ◽  
Marissa Pérez-Álvarez ◽  
Yessica Hernández-Valdez
Keyword(s):  
Rheological Properties ◽  
Water Soluble ◽  
Solution Polymerization ◽  
Dilute Solutions
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