Refine
Has Fulltext
- no (10)
Document Type
- Article (10)
Language
- English (10)
Is part of the Bibliography
- yes (10)
Keywords
- Laser-SNMS (2)
- oxidative stress (2)
- silver nanoparticles (2)
- Ag/peptide@SiO(2) nanostructures (1)
- Cellular uptake (1)
- Cellulose (1)
- Gold nanotriangles (1)
- Heparin (1)
- Mesopores (1)
- Micropores (1)
Institute
- Institut für Chemie (10) (remove)
New amphiphilic block copolymers consisting of N-vinyl pyrrolidone and vinyl acetate were synthesized via controlled radical polymerization using a reversible addition/fragmentation chain transfer (RAFT)/macromolecular design via the interchange of xanthates (MADIX) system. The synthesis was carried out in 1,4-dioxane as process solvent. In order to get conclusions on the mechanism of the polymerization the molecular structure of formed copolymers was analysed by means of different analytical techniques. C-13 NMR spectroscopy was used for the determination of the monomer ratios. End groups were analysed by means of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. This technique was also used to determine possible fragmentations of the RAFT end groups. By means of a combination of size exclusion chromatography, C-13 NMR and static light scattering molar mass distributions and absolute molar masses could be analysed. The results clearly show a non-ideal RAFT mechanism.