Epoxy-functional diblock copolymer spheres, worms and vesicles via polymerization-induced self-assembly in mineral oil
| Autor: | Matthew J. Derry, Philip J. Docherty, Steven P. Armes, Chloé Girou |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Dispersion polymerization
Glycidyl methacrylate Materials science Polymers and Plastics Organic Chemistry Bioengineering Chain transfer Degree of polymerization Biochemistry chemistry.chemical_compound Dynamic light scattering Polymerization chemistry Chemical engineering Copolymer Molar mass distribution |
| Zdroj: | Polymer Chemistry. 11:3332-3339 |
| ISSN: | 1759-9962 1759-9954 |
| DOI: | 10.1039/d0py00380h |
| Popis: | Epoxy-functional diblock copolymer spheres, worms and vesicles are synthesized at 30% w/w solids via reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization of glycidyl methacrylate (GlyMA) in mineral oil at 70 °C. This is achieved by using a relatively short oil-soluble poly(stearyl methacrylate) (PSMA) macromolecular chain transfer agent (macro-CTA) with a mean degree of polymerization of 9. Gel permeation chromatography (GPC) studies indicate that good control over the molecular weight distribution can be obtained and the resulting PSMA9-PGlyMAx nano-objects are characterized by dynamic light scattering (DLS), transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). Oscillatory rheology studies of a 30% w/w PSMA9-PGlyMA75 worm gel indicate that thermally-triggered degelation occurs on heating to 100 °C. TEM studies indicate that a partial worm-to-vesicle transition occurs under such conditions. |
| Databáze: | OpenAIRE |
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