dc.contributor.author | Hadjiantoniou, N. A. | en |
dc.contributor.author | Krasia-Christoforou, T. | en |
dc.contributor.author | Loizou, E. | en |
dc.contributor.author | Porcar, L. | en |
dc.contributor.author | Patrickios, C. S. | en |
dc.creator | Hadjiantoniou, N. A. | en |
dc.creator | Krasia-Christoforou, T. | en |
dc.creator | Loizou, E. | en |
dc.creator | Porcar, L. | en |
dc.creator | Patrickios, C. S. | en |
dc.date.accessioned | 2019-05-06T12:23:41Z | |
dc.date.available | 2019-05-06T12:23:41Z | |
dc.date.issued | 2010 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48402 | |
dc.description.abstract | Four linear amphiphilic multiblock copolymers based on 2-(dimethylamino) ethyl methacrylate (DMAEMA, hydrophilic) and methyl methacrylate (MMA, hydrophobic), bearing from two to five blocks, were synthesized using reversible addition - fragmentation chain transfer polymerization and stepwise monomer additions. The degree of polymerization of each hydrophilic poly DMAEMA block was ∼50, while that of the hydrophobic polyMMA blocks was ca. 20. The stepwise monomer addition procedure secured that each higher multiblock was composed of its immediately lower homologue plus exactly one extra block. The molecular weights (MW) of the synthesized (co)polymers, as measured by gel permeation chromatography (GPC), were close to the theoretically expected. GPC also indicated rather narrow molecular weight distributions which, however, broadened with the number of blocks. The compositions of the copolymers, as determined by proton nuclear magnetic resonance spectroscopy, were also close to the expected values. The cloud points of the copolymers, measured by turbidimetry, were found to increase with the number of blocks. The sizes of the micelles formed by the copolymers in aqueous solution were characterized using dynamic light scattering and small-angle neutron scattering. The determined values of the hydrodynamic radii, the radii of gyration, and the aggregation numbers of the micelles increased slightly with the block number from the triblock to the pentablock copolymer, implying extensive folding of the chains of the tetrablock and the pentablock copolymers in their micelles. The aggregation number of the tetrablock copolymer was approximately one-half that of the diblock copolymer whose unimer MW was onehalf that of the tetrablock, suggesting that the micellar cores of these two types of micelles were composed of the same number of hydrophobic units. © 2010 American Chemical Society. | en |
dc.language.iso | eng | en |
dc.source | Macromolecules | en |
dc.subject | Polymers | en |
dc.subject | Resonance | en |
dc.subject | Synthesis (chemical) | en |
dc.subject | Aggregation numbers | en |
dc.subject | Micelles | en |
dc.subject | Neutron scattering | en |
dc.subject | 2-(dimethylamino)ethyl methacrylate | en |
dc.subject | Reversible addition-fragmentation chain transfer polymerization | en |
dc.subject | Block copolymers | en |
dc.subject | Esters | en |
dc.subject | Nuclear magnetic resonance spectroscopy | en |
dc.subject | Free radical polymerization | en |
dc.subject | Hydrophilicity | en |
dc.subject | Hydrophobicity | en |
dc.subject | Plastic products | en |
dc.subject | Gels | en |
dc.subject | Chromatographic analysis | en |
dc.subject | Copolymerization | en |
dc.subject | Polymer blends | en |
dc.subject | Acrylic monomers | en |
dc.subject | Amphiphilics | en |
dc.subject | Aqueous solutions | en |
dc.subject | Cloud points | en |
dc.subject | Controlled synthesis | en |
dc.subject | Degree of polymerization | en |
dc.subject | Diblock copolymer | en |
dc.subject | Expected values | en |
dc.subject | Hydrodynamic radius | en |
dc.subject | Living polymerization | en |
dc.subject | Methyl methacrylates | en |
dc.subject | Micellar core | en |
dc.subject | Molecular weight distribution | en |
dc.subject | Monomer addition | en |
dc.subject | Multiblock copolymer | en |
dc.subject | Multiblocks | en |
dc.subject | Narrow molecular weight distributions | en |
dc.subject | Number of blocks | en |
dc.subject | Pentablock copolymers | en |
dc.subject | Polymethyl methacrylates | en |
dc.subject | Proton nuclear magnetic resonance spectroscopy | en |
dc.subject | RAft polymerization | en |
dc.subject | Small-angle neutron scattering | en |
dc.subject | Tetrablock copolymers | en |
dc.subject | Triblocks | en |
dc.title | Alternating amphiphilic multiblock copolymers: Controlled synthesis via RAFT polymerization and aqueous solution characterization | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/ma902709p | |
dc.description.volume | 43 | |
dc.description.startingpage | 2713 | |
dc.description.endingpage | 2720 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Krasia-Christoforou, T. [0000-0002-9915-491X] | |
dc.description.totalnumpages | 2713-2720 | |
dc.gnosis.orcid | 0000-0002-9915-491X | |