Surfactant-free synthesis of colloidal poly(methyl methacrylate)/silica nanocomposites in the absence of auxiliary comonomers

Langmuir

Volumn 18, Issue 12, 2002, Pages 4562-4565

  Percy, M J ^a   Armes, S P ^a  

^a UNIVERSITY OF SUSSEX   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

COMONOMERS;

ALCOHOLS; COLLOIDS; COMPOSITION EFFECTS; ELECTROPHORESIS; MONOMERS; POLYMETHYL METHACRYLATES; SURFACE ACTIVE AGENTS; SYNTHESIS (CHEMICAL); THERMAL EFFECTS; X RAY PHOTOELECTRON SPECTROSCOPY;

NANOSTRUCTURED MATERIALS;

EID: 0037062789     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la020158s     Document Type: Article

References (20)

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12. Percy, M.J.; Barthet, C.; Lobb, J.C.; Khan, M.A.; Lascelles, S.F.; Vamvakaki, M.; Armes, S.P. Langmuir 2000, 16, 6913. Very recently, Antonietti'S group have shown that similar nanocomposite particles can be prepared using a miniemulsion polymerization technique, see: Tiarks, F.; Landfester, K.; Antonietti, M. Langmuir 2001, 17, 5775.
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14. During the preparation of this manuscript, we became aware of a recent paper by Bourgeat-Lami and co-workers describing the synthesis of poly(methyl methacrylate)/silica nanocomposite particles [Luna-Xavier, J.L.; Bourgeat-Lami, E.; Guyot, A. Colloid Polym. Sci. 2001, 279, 947]. However, there are several significant differences between our approach and their work. The French group polymerized methyl methacrylate at high dilution (approximately 1.0 wt% monomer) in the presence of 68 nm silica particles using a large excess (50% based on monomer!) of a nonionic surfactant, nonylphenol poly(oxyethylene). This results in the decoration of the silica "seed" particles with nanosized polymer latex particles, which is a very different nanocomposite particle morphology to that obtained by us in the present work.
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20. Inspection of the original Highlink silica sol indicated only a very low carbon content, presumably due to unhydrolyzed alkoxy groups. The C/Si atomic ratio was found to be 0.08. Thus, to a first approximation, this carbon source could be ignored in the XPS analysis.