Surface-Initiated PLP-SEC of Butyl Acrylate and Styrene from Silica Nanoparticles
2009 | journal article. A publication with affiliation to the University of Göttingen.
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- Authors
- Rotzoll, Robert; Vana, Philipp
- Abstract
- The pulsed-laser polymerization size-exclusion chromatography (PLP-SEC) technique has been successfully applied to the measurement of the propagation rate coefficient, k(p), of the surface-initiated polymerizations of butyl acrylate (BA) and styrene, using the silica-immobilized bipedal initiator 4,4-azobis(4-cyano-N-(3 '-triethoxysilylpropyl)-valeric amide) (ACTA). The molecular weight distribution (MWD) of grafted poly(BA) polymerized at 25 degrees C was structureless, whereas at 5 degrees C reaction temperature, the MWD exhibited a typical PLP structure with two inflection points. In case of styrene the SEC trace obtained at 26 degrees C is well structured and shows four inflection points. The propagation rate coefficients k(P) of the surface-initiated polymerizations were about 22% higher in the case of BA and about 27-28% higher in the case of styrene compared to the IUPAC benchmark data.
- Issue Date
- 2009
- Status
- published
- Publisher
- Wiley-v C H Verlag Gmbh
- Journal
- Macromolecular Rapid Communications
- ISSN
- 1022-1336
- Sponsor
- Deutsche Forschungsgemeinschaft [VA226/4-1]