dc.contributor.author | Popescu, M. -T | en |
dc.contributor.author | Tsitsilianis, C. | en |
dc.contributor.author | Papadakis, Christine M. | en |
dc.contributor.author | Adelsberger, J. | en |
dc.contributor.author | Balog, Sándor | en |
dc.contributor.author | Busch, P. | en |
dc.contributor.author | Hadjiantoniou, Natalie A. | en |
dc.contributor.author | Patrickios, Costas S. | en |
dc.creator | Popescu, M. -T | en |
dc.creator | Tsitsilianis, C. | en |
dc.creator | Papadakis, Christine M. | en |
dc.creator | Adelsberger, J. | en |
dc.creator | Balog, Sándor | en |
dc.creator | Busch, P. | en |
dc.creator | Hadjiantoniou, Natalie A. | en |
dc.creator | Patrickios, Costas S. | en |
dc.date.accessioned | 2019-11-21T06:22:28Z | |
dc.date.available | 2019-11-21T06:22:28Z | |
dc.date.issued | 2012 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/56055 | |
dc.description.abstract | An amphiphilic cationic polyelectrolyte based on poly[2-(dimethylamino) ethyl methacrylate] (polyDMA) and poly(n-butyl methacrylate) (polyBuMA) with a BuMA-DMA-BuMA-DMA-BuMA-DMA-BuMA heptablock copolymer architecture was studied in aqueous media. This copolymer was found to form a physical hydrogel via the intermolecular hydrophobic association (physical cross-linking) of the BuMA blocks. The rheological properties of the heptablock hydrogels were investigated as a function of copolymer concentration, and pH. The results showed a peculiar pH-dependence of the rheological properties, remarkably different from those observed with associative telechelic polyelectrolytes. Aqueous solutions of this copolymer were free-flowing sols at low pH (below 2) and high pH (above 8), whereas they turned into gels at intermediate pH values. The rheological properties studied as a function of pH showed two additional stiff-soft-stiff gel transitions at pH 4.5 and 6.5. Small-angle neutron scattering revealed the formation of a 3D transient network of bridged flower-like micelles whose structural characteristics, i.e., micellar radius, hard-sphere radius and hard-sphere volume fraction, were smoothly evolving with the pD. © 2012 American Chemical Society. | en |
dc.source | Macromolecules | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84860157388&doi=10.1021%2fma300222d&partnerID=40&md5=ee54d6843732239d7d34a50a14a97d74 | |
dc.subject | Neutron scattering | en |
dc.subject | 2-(dimethylamino)ethyl methacrylate | en |
dc.subject | Copolymers | en |
dc.subject | Aqueous media | en |
dc.subject | Poly(n-butyl methacrylate) (Pn-BMA) | en |
dc.subject | Structural characteristics | en |
dc.subject | Rheology | en |
dc.subject | Rheological property | en |
dc.subject | Polymer blends | en |
dc.subject | Small-angle neutron scattering | en |
dc.subject | Spheres | en |
dc.subject | Hydrogels | en |
dc.subject | Stimuli-responsive | en |
dc.subject | Flower-like | en |
dc.subject | Polyelectrolytes | en |
dc.subject | Sols | en |
dc.subject | Copolymer concentration | en |
dc.subject | pH value | en |
dc.subject | Amphiphilic polyelectrolytes | en |
dc.subject | Amphiphilic cationic polyelectrolytes | en |
dc.subject | Free flowing | en |
dc.subject | Gel transitions | en |
dc.subject | Hard-sphere | en |
dc.subject | Heptablock copolymers | en |
dc.subject | High pH | en |
dc.subject | Intermolecular hydrophobic association | en |
dc.subject | PH response | en |
dc.subject | pH-dependence | en |
dc.subject | Telechelics | en |
dc.subject | Transient network | en |
dc.title | Stimuli-Responsive amphiphilic polyelectrolyte heptablock copolymer physical hydrogels: An unusual ph-response | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/ma300222d | |
dc.description.volume | 45 | |
dc.description.issue | 8 | |
dc.description.startingpage | 3523 | |
dc.description.endingpage | 3530 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :16</p> | en |
dc.source.abbreviation | Macromolecules | en |
dc.contributor.orcid | Patrickios, Costas S. [0000-0001-8855-0370] | |
dc.gnosis.orcid | 0000-0001-8855-0370 | |