Formation of polystyrene nanoparticles with a core–shell contrast by surfactant-free emulsion polymerization and thermal annealing

Chemistry Letters 2026

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Authors: Taketo Tokuda, Rei Kakitani, Chisato Kizaki, Thi Ngan Vu, Hideto Minami, Rintaro Takahashi, Shin‐ichi Yusa
DOI: 10.1093/chemle/upag036
Cited by: 0
References: 22

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Abstract

Abstract Styrene was polymerized by soap-free emulsion polymerization in water in the presence of an organic solvent to form polystyrene (PSt) nanoparticles containing the solvent. Thermal annealing under reflux produced particles with core–shell contrast in TEM, indicating radial redistribution of polymer mass. The core size depended on solvent type, while a higher initiator/monomer ratio reduced particle size. Internal contrast remained tunable across a range of particle sizes.

Fields of Study & Subjects

Pickering emulsions and particle stabilization Advanced Polymer Synthesis and Characterization Surfactants and Colloidal Systems

Publication details

Journal / source
Chemistry Letters
Volume
55
Issue
3
Publication date
1 March 2026
Language
EN