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Article Dans Une Revue Angewandte Chemie International Edition Année : 2023

Visible‐Light Initiated Dispersion Photopolymerization of Styrene

Résumé

Polystyrene (PS) particles were synthesized in ethanol/water mixture by dispersion polymerization using visible light irradiation, with either a N‐heterocyclic carbene borane‐based photoinitiating system (PIS) or a disulfide. With the full PIS and poly(ethylene glycol) methyl ether methacrylate (PEGMA) as stabilizer, the size distributions were broad and the amount of PEGMA had a strong impact on the experiment reproducibility. The addition of a base solved the problem, leading to faster polymerizations, narrower size distributions and larger particles. With the disulfide as sole PIS, bigger and narrowly distributed PS particles were again formed. Quantitative conversion was achieved in each system, with particle size ranging between 100 and 350 nm. The use of poly(N‐vinylpyrrolidone) as stabilizer led to significantly larger particles, up to 1.2 μm, with narrow size distributions. The production of such large latex particles by photoinitiated polymerizations is unprecedented.

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Chimie
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jeudi 26 septembre 2024
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jeudi 26 septembre 2024
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Dates et versions

hal-04218020 , version 1 (26-09-2023)

Identifiants

Citer

Rémi Canterel, Jacques Lalevée, Elodie Bourgeat-Lami, Emmanuel Lacôte, Muriel Lansalot. Visible‐Light Initiated Dispersion Photopolymerization of Styrene. Angewandte Chemie International Edition, In press, ⟨10.1002/anie.202309674⟩. ⟨hal-04218020⟩
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