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Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
Published on: July 9, 2015
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A Comparative Study of Two Synthesis Methods for Poly(Acrylic Acid-Co-Acrylamide) Incorporating a Hyperbranched
Ramses S Meleán Brito1,2, Agustín Iborra3, Juan M Padró3,4
1Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Av. Haya de la Torre y Av. Medina Allende, Córdoba X5000HUA, Argentina.
Polymers
|April 12, 2025
Summary
A novel star-shaped macromonomer significantly boosts the viscosity of poly(acrylic acid-co-acrylamide) polymers. This enhancement, achieved through specific synthesis and purification, shows promise for enhanced oil recovery applications.
Area of Science:
- Polymer Chemistry
- Materials Science
- Chemical Engineering
Background:
- Poly(acrylic acid-co-acrylamide) (HPAM) is crucial for enhanced oil recovery (EOR).
- Improving HPAM rheological properties is key to maximizing oil extraction efficiency.
- Novel macromonomers can modify polymer architecture and performance.
Purpose of the Study:
- To synthesize and characterize poly(acrylic acid-co-acrylamide) with a novel star-shaped macromonomer.
- To investigate the impact of synthesis media (aqueous vs. supercritical) on polymer properties.
- To evaluate the rheological performance enhancement for EOR applications.
Main Methods:
- Copolymerization of acrylic acid and acrylamide with a star-shaped macromonomer.
- Polymer characterization using FTIR, NMR, and SEC-MALS-dRI.
- Rheological assessments and purification studies (dialysis).
Main Results:
- Copolymers with the star-shaped macromonomer showed significantly higher viscosities.
- Supercritical CO2-ethyl acetate synthesis yielded higher viscosity polymers than aqueous synthesis.
- Dialysis was essential for removing short chains and optimizing rheology, especially for supercritical samples.
Conclusions:
- The star-shaped macromonomer effectively enhances HPAM rheological properties.
- Supercritical fluid synthesis offers advantages for producing high-viscosity polymers.
- These modified polymers hold significant potential for improving enhanced oil recovery operations.
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