Hydrophobically Modified Polyelectrolytes, 4. Synthesis and Solution Properties of Fluorocarbon-Containing Poly(acrylic acid)

Zhou, Hui; Song, Guoqiang; Zhang, Yunxiang; Chen, Junyan; Jiang, Ming; Hogen‐Esch, Thieo E.; Dieing, Reinhold; Ma, Lian; Haeussling, L.

doi:10.1002/1521-3935(20011001)202:15<3057::aid-macp3057>3.0.co;2-5

Cited by 31 publications

(27 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The viscosity of the system decreases. The higher the NaCl concentration is, the smaller the viscosity is [6,24,25]. As shown in Fig.…”

Section: Resultssupporting

confidence: 88%

“…Thus the HPAM will extend and have larger hydrodynamic volume, accordingly the viscosity of solution will be higher. The NaCl added to the HPAM solution can ionize Na + , which can destroy the electrostatic repulsion between the -COOˉgroups of the HPAM molecule chain and compress the electrical double layer around the -COOˉgroups and make the hydration film thinning [6,25]. This leads the HPAM chain to a more collapsed conformation and smaller overall dimension.…”

Section: Resultsmentioning

confidence: 99%

“…3 The influence of NaCl concentration on the parameters [Radius of gyration (a), hydrodynamic radius (b), the ratio of the radius of gyration and the hydrodynamic radius (c) and intrinsic viscosity (d)] of HPAM solution models at 298 K concentration increases. The simulation trend is in agreement with the experimental research [6,24,25]. The HPAM chain changes from an extended coil to collapsed coil with the addition of NaCl.…”

Section: Resultsmentioning

confidence: 99%

“…Many investigators have considered that the electrostatic repulsion for the -COOˉgroups hydrated lead to extend the polymer chain, and the addition of NaCl made the hydration film thinner, thus the electrostatic repulsion was screened, the polymer chain becomes more flexible, leading the polymer chain to a more collapsed conformation and to smaller overall dimension [6,24,25]. However, no one has accounted for the effect of NaCl on the hydration of theCOOˉgroups of the HPAM from microscopic view.…”

Section: The Radial Distribution Functionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental and theoretical study of dilute polyacrylamide solutions: effect of salt concentration

et al. 2012

View full text Add to dashboard Cite

The structure and intrinsic viscosity of the partially hydrolyzed polyacrylamide (HAPM) and polyacrylamide (PAM) in aqueous solution were investigated by comparative studies of molecular dynamics simulation over a wide range of the NaCl concentration. The radius of gyration (R(g)), the hydrodynamic radius (R(h)) and the ratio of the radius gyration and the hydrodynamic radius (ρ) were calculated for the PAM or HPAM in solutions with different NaCl concentrations at 298 K. The conformational changes of the polymer chain in different aqueous solution were discussed according to the molecular shapes. It was found that the change of the R(h) or the R(g) can reflect the change in the [η]. And the changes in the structure of the polymer chain with different NaCl concentrations were discussed via the ρ which can predict [η] changes. The results showed that behavior of the polymer solution calculated from the simulation agreed with the experimental measurements. Furthermore, the radial distribution functions for the HPAM solutions were investigated, which verified the micro-mechanism for the change of the structure. The results of this research showed that the computational method used in this work has practical applicability.

show abstract

“…The viscosity of the system decreases. The higher the NaCl concentration is, the smaller the viscosity is [6,24,25]. As shown in Fig.…”

Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: The Radial Distribution Functionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and theoretical study of dilute polyacrylamide solutions: effect of salt concentration

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Fluorocarbon modified PAAs have been synthesized via the precipitation copolymerization of acrylic acid and hydrophobic comonomers in benzene. [12] Copolymers of acrylamide and N-alkylacrylamides have been prepared by micellar copolymerization in aqueous solution using SDS as a surfactant and potassium persulfate as an initiator. [13][14][15] Another class of HMPs which have gained industrial importance are hydrophobically end-capped polymers.…”

Section: Introductionmentioning

confidence: 97%

Hydrophobically Modified Poly(acrylic acid) Using 3‐Pentadecylcyclohexylamine: Synthesis and Rheology

Shedge

Lele

Wadgaonkar

et al. 2005

Macro Chemistry & Physics

View full text Add to dashboard Cite

Summary: Hydrophobically modified poly(acrylic acid) was synthesized using 3‐pentadecylcyclohexylamine (3‐PDCA), which was in turn synthesized from 3‐pentadecylphenol, one of the components of cashew‐nut shell liquid (CNSL), a renewable resource material. 1H NMR spectra confirmed the incorporation of 3‐PDCA onto PAA and a series of HMPs with three different molar concentrations, viz ≅ 3, 5 and 7 mol‐% of 3‐PDCA, were synthesized. An increase in viscosity with increasing hydrophobic content was observed by rheological measurements. The critical association concentrations were determined using an Ubbelohde viscometer and a controlled stress rheometer. The stability of HMPs towards temperature and shear was studied. Rheological measurements showed that there was a steady increase in viscosity with increase in hydrophobe content due to the formation of reversible networks. These polymers exhibited gel‐like behavior at low concentrations (≥2 wt.‐%) with an apparent yield stress (ca. 10 Pa) and showed shear thinning properties (non‐Newtonian). However, below a critical concentration, c [η], they showed Newtonian behavior.

show abstract

Ionic Mixed Interactions and Hofmeister Effects

Ciferri

2012

Ionic Interactions in Natural and Synthetic Macromolecules

View full text Add to dashboard Cite

Hydrophobically Modified Polyelectrolytes, 4. Synthesis and Solution Properties of Fluorocarbon-Containing Poly(acrylic acid)

Cited by 31 publications

References 19 publications

Experimental and theoretical study of dilute polyacrylamide solutions: effect of salt concentration

Experimental and theoretical study of dilute polyacrylamide solutions: effect of salt concentration

Hydrophobically Modified Poly(acrylic acid) Using 3‐Pentadecylcyclohexylamine: Synthesis and Rheology

Ionic Mixed Interactions and Hofmeister Effects

Contact Info

Product

Resources

About