dc.contributor.author | Vamvakaki, Maria | en |
dc.contributor.author | Patrickios, Costas S. | en |
dc.creator | Vamvakaki, Maria | en |
dc.creator | Patrickios, Costas S. | en |
dc.date.accessioned | 2019-11-21T06:23:27Z | |
dc.date.available | 2019-11-21T06:23:27Z | |
dc.date.issued | 2008 | |
dc.identifier.issn | 1744-683X | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/56269 | |
dc.description.abstract | Amphiphilic ionizable model co-networks based on near-monodisperse, linear ABA and BAB triblock and statistical copolymers of 2-(dimethylamino)ethyl methacrylate (DMAEMA, hydrophilic ionizable) and n-butyl methacrylate (BuMA, hydrophobic non-ionic) were synthesized using group-transfer polymerization in tetrahydrofuran (THF) with the use of the hydrophobic ethylene glycol dimethacrylate (EGDMA) as cross-linker. Seven model co-networks were prepared in which the architecture and copolymer composition were varied systematically. One randomly cross-linked copolymer co-network was also prepared. The co-networks were characterized in terms of their degree of swelling in water as a function of pH and in THF. An increase in the aqueous degree of swelling was observed below pH 6 because of the ionization of the DMAEMA residues. The aqueous degrees of swelling at low pH decreased with the co-network composition in hydrophobic BuMA units. The maximum aqueous degrees of swelling of the copolymer co-networks were architecture-dependent, with the co-networks comprising the statistical copolymer chains swelling about 4 times more than their triblock copolymer counterparts. This was attributed to microphase separation in the triblock copolymer co-networks, which reduced the effective chain length between cross-links due to the collapse of the hydrophobic blocks. The mechanical properties of the water-swollen co-networks at pH 3 and 9 were investigated by determining the co-network uniaxial compression modulus. This modulus was higher at pH 9 than 3, and increased linearly with the BuMA content. © The Royal Society of Chemistry. | en |
dc.source | Soft Matter | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-38349192237&doi=10.1039%2fb710926a&partnerID=40&md5=73642e7038265b2f800d6b9060536529 | |
dc.subject | Mechanical properties | en |
dc.subject | Characterization | en |
dc.subject | Copolymers | en |
dc.subject | Polymerization | en |
dc.subject | Amphiphiles | en |
dc.subject | Hydrophobicity | en |
dc.subject | Swelling | en |
dc.subject | Ionization | en |
dc.subject | Tetrahydrofuran | en |
dc.subject | Ethylene glycol | en |
dc.subject | Ionizable models | en |
dc.subject | Statistical copolymer chains | en |
dc.title | Synthesis and characterization of the swelling and mechanical properties of amphiphilic ionizable model co-networks containing n-butyl methacrylate hydrophobic blocks | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1039/b710926a | |
dc.description.volume | 4 | |
dc.description.issue | 2 | |
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 :23</p> | en |
dc.source.abbreviation | Soft Matter | en |
dc.contributor.orcid | Patrickios, Costas S. [0000-0001-8855-0370] | |
dc.gnosis.orcid | 0000-0001-8855-0370 | |