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Self-assembly of block copolymers with an alkoxysilane-based core-forming block: a comparison of synthetic approaches

Citation

Teo, GH and Kuchel, RP and Zetterlund, PB and Thickett, SC, Self-assembly of block copolymers with an alkoxysilane-based core-forming block: a comparison of synthetic approaches, Journal of Polymer Science, Part A: Polymer Chemistry, 56, (4) pp. 420-429. ISSN 0887-624X (2018) [Refereed Article]


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DOI: doi:10.1002/pola.28911

Abstract

Polymerization-induced self-assembly (PISA) has become the preferred method of preparing self-assembled nano-objects based on amphiphilic block copolymers. The PISA methodology has also been extended to the realization of colloidal nanocomposites, such as polymer–silica hybrid particles. In this work, we compare two methods to prepare nanoparticles based on self-assembly of block copolymers bearing a core-forming block with a reactive alkoxysilane moiety (3-(trimethoxysilyl)propyl methacrylate, MPS), namely (i) RAFT emulsion polymerization using a hydrophilic macroRAFT agent and (ii) solution-phase self-assembly upon slow addition of a selective solvent. Emulsion polymerization under both ab initio and seeded conditions were studied, as well the use of different initiating systems. Effective and reproducible chain extension (and hence PISA) of MPS via thermally initiated RAFT emulsion polymerization was compromised due to the hydrolysis and polycondensation of MPS occurring under the reaction conditions employed. A more successful approach to block copolymer self-assembly was achieved via polymerization in a good solvent for both blocks (1,4-dioxane) followed by the slow addition of water, yielding spherical nanoparticles that increased in size as the length of the solvophobic block was increased.

Item Details

Item Type:Refereed Article
Keywords:self-assembly, RAFT polymerization, alkoxysilane, block copolymer
Research Division:Chemical Sciences
Research Group:Macromolecular and Materials Chemistry
Research Field:Synthesis of Materials
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Teo, GH (Mr Guo Teo)
Author:Thickett, SC (Dr Stuart Thickett)
ID Code:123475
Year Published:2018
Deposited By:Chemistry
Deposited On:2018-01-09
Last Modified:2018-01-09
Downloads:0

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