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Synthesis and characterisation of non-ionic AB-diblock nanoparticles prepared by RAFT dispersion polymerization with polymerization-induced self-assembly

Pei, Y, Jarrett, K, Garces, LG, Saunders, M, Croue, J-P, Buckley, CE, Lowe, A and Roth, PJ (2016) Synthesis and characterisation of non-ionic AB-diblock nanoparticles prepared by RAFT dispersion polymerization with polymerization-induced self-assembly RSC Advances, 6. pp. 28130-28139.

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Abstract

The synthesis and characterisation of soft matter nanoparticles based on AB diblock copolymers of oligo(ethylene glycol)methyl ether methacrylate (OEGMA) with 3-phenylpropyl methacrylate (PPMA) is described. Reversible addition–fragmentation chain transfer dispersion polymerization formulations that result in polymerization-induced self-assembly (RAFTDP-PISA) in methanol were utilized to access a range of poly(OEGMA-b-PPMA) (p(OEGMA-b-PPMA)) nanoparticles with the sphere-to-worm-to-vesicle order–order transitions being readily observed with increasing average degree of polymerization ([X with combining macron]n) of the pPPMA block for a fixed [X with combining macron]n of 28 for the pOEGMA block. Similarly the effect of total copolymer concentration on the resulting nanoparticle morphology is also demonstrated whereby we highlight how tuning of worm micelle diameters can be accomplished simply by varying the concentration of a formulation. The block copolymer nanoparticles were characterized by size exclusion chromatography (SEC), 1H NMR spectroscopy, transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). Additionally, we report the first examples utilizing 3D electron tomography and in situ atomic force microscopy (AFM) in methanol as convenient and powerful complementary techniques for the characterization of the resulting soft matter nano-objects with an emphasis on the direct visualization of worm nanoparticles.

Item Type: Article
Subjects : Chemistry
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
AuthorsEmailORCID
Pei, YUNSPECIFIEDUNSPECIFIED
Jarrett, KUNSPECIFIEDUNSPECIFIED
Garces, LGUNSPECIFIEDUNSPECIFIED
Saunders, MUNSPECIFIEDUNSPECIFIED
Croue, J-PUNSPECIFIEDUNSPECIFIED
Buckley, CEUNSPECIFIEDUNSPECIFIED
Lowe, AUNSPECIFIEDUNSPECIFIED
Roth, PJUNSPECIFIEDUNSPECIFIED
Date : 8 March 2016
Identification Number : 10.1039/C6RA04649E
Copyright Disclaimer : Copyright 2016 Royal Society of Chemistry
Depositing User : Symplectic Elements
Date Deposited : 13 Apr 2016 12:33
Last Modified : 13 Apr 2016 12:33
URI: http://epubs.surrey.ac.uk/id/eprint/810424

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