Copolymerization of acrylic acid and 2- acrylamido-2-methylpropane sulfonic acid in supercritical carbon dioxide

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2024-11-28 DOI:10.1016/j.supflu.2024.106485

Ramses S. Meleán Brito, Juan M. Milanesio, Juan M. Padró, Cristian Villa-Pérez, Aurélie Colas, Miriam C. Strumia, Séverine Camy, Mathias Destarac, Facundo Mattea

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引用次数: 0

Abstract

This study explores the copolymerization of acrylic acid and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) in supercritical carbon dioxide (scCO2) as a sustainable alternative to traditional solvent-based methods. Using free-radical polymerization in scCO2, copolymers were synthesized without the need for additional drying. The influence of AMPS concentration in the feed on copolymer properties was investigated, achieving reactions with monomer conversions ranging from 61.3 to 92.9 mol%. Analytical characterization confirmed low AMPS incorporation across samples, with molar mass and hydrodynamic properties varying based on the AMPS content. Notably, two distinct polymer configurations were observed depending on whether the initial AMPS concentration was above or below 12 mol%, with polymers exhibiting molar masses between 13.2×10⁵ and 14.2×10⁵ g mol−1. Rheological analysis revealed that higher AMPS concentrations led to increased hydrodynamic radii, enhanced thickening capacity, and improved resistance to both monovalent (NaCl) and divalent (CaCl₂) salts in aqueous solutions.

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.