Effects of stirring rate on morphology of aqueous RAFT emulsion PISA-derived block copolymer nanoparticles

Hyun Jin Kim; Fumi Ishizuka; Jiang Li; Rhiannon P. Kuchel; Shunsuke Chatani; Hiroshi Niino; Per B. Zetterlund

doi:10.1039/D3PY01318A

Effects of stirring rate on morphology of aqueous RAFT emulsion PISA-derived block copolymer nanoparticles†

Hyun Jin Kim,

^a Fumi Ishizuka,

^a Jiang Li,^a Rhiannon P. Kuchel,^b Shunsuke Chatani,^c Hiroshi Niino^d and Per B. Zetterlund

*^a

Author affiliations

* Corresponding authors

^a Cluster for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, The University of New South Wales, Sydney, NSW, Australia
E-mail: p.zetterlund@unsw.edu.au

^b Electron Microscope Unit, The University of New South Wales, Sydney, NSW, Australia

^c Hiroshima R&D Center, Mitsubishi Chemical Corporation, 20-1 Miyuki-cho, Otake, Hiroshima 739-0693, Japan

^d Polymer Laboratory, Science & Innovation Center, Mitsubishi Chemical Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama, Kanagawa, Japan

Abstract

The influence of stirring rate on nanoparticle morphology in aqueous RAFT emulsion PISA has been investigated using the macroRAFT agents poly(poly(ethylene)glycol methyl ether acrylate)-TTC and poly(poly(ethylene glycol) methyl ether methacrylate)-TTC chain extended with styrene/n-butyl acrylate (copolymer) and methyl methacrylate (MMA), respectively. The influence of temperature was first investigated by conducting polymerizations at 50 °C and 70 °C for the MMA system, revealing that formation of high-order morphologies is facilitated at 70 °C. The influence of stirring rate was explored for both systems, showing that the extent of influence depends on the polymerization temperature. At 50 °C, high-order morphologies were obtained only at moderate stirring rate whereas at 70 °C, high-order morphologies were observed across a much wider range of stirring rates. The present results demonstrate that both polymerization temperature and stirring rate can significantly affect the self-assembly process in PISA.

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DOI: https://doi.org/10.1039/D3PY01318A
Article type: Paper
Submitted: 30 Nov 2023
Accepted: 09 Feb 2024
First published: 09 Feb 2024

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Polym. Chem., 2024,15, 1102-1111

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Effects of stirring rate on morphology of aqueous RAFT emulsion PISA-derived block copolymer nanoparticles

H. J. Kim, F. Ishizuka, J. Li, R. P. Kuchel, S. Chatani, H. Niino and P. B. Zetterlund, Polym. Chem., 2024, 15, 1102 DOI: 10.1039/D3PY01318A

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Polymer Chemistry

Effects of stirring rate on morphology of aqueous RAFT emulsion PISA-derived block copolymer nanoparticles†

Abstract

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Effects of stirring rate on morphology of aqueous RAFT emulsion PISA-derived block copolymer nanoparticles

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