Study on association behavior and solution properties of poly(acrylic acid-alkyl polyoxyethylene acrylate) amphiphilic copolymers

Hydrophobically associating water-soluble polymers (HAWSPs), which possess surfactant and polymer properties, are extensively studied. This research work presents a novel HAWSP, poly(acrylic acid-alkyl polyoxyethylene acrylate) (P(AA-AAEO n )), synthesized by aqueous polymerization of acrylic acid a...

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Bibliographic Details
Published in:Iranian polymer journal 2024, Vol.33 (7), p.943-953
Main Authors: Wang, Xiqiu, Zhang, Zhiqing, Zhang, Yukun, Zhang, Guodong, Wang, Fang
Format: Article
Language:English
Subjects:
Acrylic acid
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Copolymers
Elastic analysis
Fourier transforms
Glass
Natural Materials
NMR
Nuclear magnetic resonance
Original Research
Photon correlation spectroscopy
Polymer Sciences
Polymers
Polyoxyethylene
Rheological properties
Rheology
Shear strength
Surface tension
Viscoelasticity
Water soluble polymers
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Summary:Hydrophobically associating water-soluble polymers (HAWSPs), which possess surfactant and polymer properties, are extensively studied. This research work presents a novel HAWSP, poly(acrylic acid-alkyl polyoxyethylene acrylate) (P(AA-AAEO n )), synthesized by aqueous polymerization of acrylic acid and alkyl polyoxyethylene acrylate (AAEO n ) with various ethoxy groups. The structure of P(AA-AAEOn) was characterized using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopies. The association behavior in the solution was also evaluated through surface tension, dynamic light scattering, and rheology measurements. The findings exhibited that P(AA-AAEO n ) demonstrated noteworthy surface activity, which was amplified as the proportion of the hydrophobic group increased and could effectively reduce the water surface tension. When the concentration reached 0.01%, P(AA-AAEOn) in the solution changed from intramolecular association to intermolecular association. Additionally, P(AA-AAEO n ) manifested notable shear resistance, shear recovery, and viscoelasticity, transitioned from energy elasticity to entropy elasticity in P(AA-AAEO n ) molecules between 25 and 35 ℃. The experimental phenomena and mechanisms resulting from the association behavior of polymer molecules have undergone careful analysis. The elastic conversion of polymer molecules at varying temperatures is a noteworthy finding, which has not been extensively documented in earlier research works. A detailed analysis of this phenomenon has been conducted. However, further research is crucial to establish the prevalence of this phenomenon in HAWSPs. Graphical abstract
ISSN:1026-1265
1735-5265
DOI:10.1007/s13726-024-01296-8