POS1-0010
"Optimizing Miniemulsion Parameters for Controlled ATRP Polymerization: A Study on Stability and Surfactant/Ligand Effects
Topic
S1. Polymer Synthesis
When and Where
Sep 30, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Heesuk KIM
Jinhye BAE
Presenter(s)
Ahmad Shaaban (Egyptian Petroleum Research Institute (EPRI))
Co-Author(s)
Abstract
This study elucidates the intricacies involved in achieving successful atom transfer radical polymerization (ATRP) within a miniemulsion system, exemplifying the controlled radical polymerization utilizing a reversible-deactivation mechanism. The investigation primarily centers on refining miniemulsion formation through the meticulous optimization of ultrasonication parameters, including amplitude, ultrasonication time, and the judicious combination of surfactant and hydrophobe. A systematic exploration encompassing ultrasonication amplitudes from 25 to 100%, varied sonication times (3-10 min.), and diverse pulse durations has been conducted, evaluating the stability of the resulting emulsion over a one-week period.
Furthermore, the study delves into the application of Activator Generated by Electron Transfer (AGET) as a specific ATRP mechanism for different monomers. Various hydrophobic ligands were investigated in tandem with nonionic surfactants to stabilize the miniemulsion during polymerization. Among the examined ligands, bis(2-pyridylmethyl)octadecylamine (BPMODA) demonstrated superior controllability over the polymerization process compared to alternatives.
In contrast, AGET ATRP experiments employing other ligand complexes resulted in either unstable miniemulsion with coagulum formation or uncontrolled polymerization. These observations underscore the significance of meticulous ligand selection and the synergistic effects of hydrophobic ligands and nonionic surfactants in optimizing AGET ATRP within miniemulsion systems.
In conclusion, this research provides valuable insights into the critical parameters governing miniemulsion stability and AGET ATRP controllability. The identified optimal conditions, notably the utilization of BPMODA with Brij O20, establish a dependable method for achieving controlled polymerization in a stable latex form, thereby paving the way for further advancements in polymer synthesis and applications.
Furthermore, the study delves into the application of Activator Generated by Electron Transfer (AGET) as a specific ATRP mechanism for different monomers. Various hydrophobic ligands were investigated in tandem with nonionic surfactants to stabilize the miniemulsion during polymerization. Among the examined ligands, bis(2-pyridylmethyl)octadecylamine (BPMODA) demonstrated superior controllability over the polymerization process compared to alternatives.
In contrast, AGET ATRP experiments employing other ligand complexes resulted in either unstable miniemulsion with coagulum formation or uncontrolled polymerization. These observations underscore the significance of meticulous ligand selection and the synergistic effects of hydrophobic ligands and nonionic surfactants in optimizing AGET ATRP within miniemulsion systems.
In conclusion, this research provides valuable insights into the critical parameters governing miniemulsion stability and AGET ATRP controllability. The identified optimal conditions, notably the utilization of BPMODA with Brij O20, establish a dependable method for achieving controlled polymerization in a stable latex form, thereby paving the way for further advancements in polymer synthesis and applications.
