Browsing by Subject "Copolymers"

Article

2-(2,3,4,5,6-Pentafluorophenyl)-1H-benzo[d]imidazole, a fluorine-rich building block for the preparation of conjugated polymer donors for organic solar cell applications

Neophytou, Marios; Ioannidou, Heraklidia A.; Ioannou, Theodosia A.; Chochos, Christos L.; Economopoulos, Solon P.; Koutentis, Panayiotis Andreas; Itskos, Grigorios; Choulis, Stelios A. (2012)

We have introduced the pentafluorophenyl substituted benzimidazole as a building block of conjugated polymers for optoelectronic applications. We present the synthesis of a copolymer bearing fluorene as the comonomer. A ...

Article

Amphiphilic diblock and ABC triblock methacrylate copolymers: Synthesis and aqueous solution characterization

Triftaridou, Aggeliki I.; Vamvakaki, Maria; Patrickios, Costas S. (2002)

Three isomeric, linear, equimolar, amphiphilic ABC triblock copolymers comprising methyl methacrylate (MMA, nonionic hydrophobic), 2-(dimethylamino)ethyl methacrylate, (DMAEMA, ionizable hydrophilic) and hexa(ethylene ...

Article

Amphiphilic model conetworks based on cross-linked star copolymers of benzyl methacrylate and 2-(dimenthylamino)ethyl methacrylate: Synthesis, characterization, and DNA adsorption studies

Achilleos, Demetra S.; Georgiou, Theoni K.; Patrickios, Costas S. (2006)

Six amphiphilic model conetworks of a new structure, that of cross-linked "in-out" star copolymers, were synthesized by the group transfer polymerization (GTP) of the hydrophobic monomer benzyl methacrylate (BzMA) and the ...

Article

Amphiphilic networks based on cross-linked star polymers: A small-angle neutron scattering study

Vamvakaki, Maria; Patrickios, Costas S.; Lindner, P.; Gradzielski, M. (2007)

Four different polymer model networks of identical molecular architecture based on cross-linked stars (CLSs) were investigated by small-angle neutron scattering (SANS). One of the model networks was a hydrophilic homopolymer ...

Article

Di(n-butyl) itaconate end-functionalized polymers: Synthesis by group transfer polymerization and solution characterization

Kassi, Eleni; Loizou, Elena; Porcar, L.; Patrickios, Costas S. (2011)

In this study we present our efforts to homo- and co-polymerize, using group transfer polymerization (GTP), a dialkyl diester of itaconic acid, a naturally-derived unsaturated dicarboxylic acid. The monomer employed, ...

Article

Excitation dynamics of a low bandgap silicon-bridged dithiophene copolymer and its composites with fullerenes

Othonos, Andreas S.; Itskos, Grigorios; Neophytou, Marios; Choulis, Stelios A. (2012)

We report on excitation dynamics in pristine and bulk heterojunction films of the low bandgap silicon-bridged dithiophene copolymer poly[(4,4′-bis(2- ethylhexyl)dithieno[3,2-b:2′, 3′-d]silole)-2,6-diyl-alt-(4,7-bis(2- ...

Article

Fabrication and characterization of magnetoresponsive electrospun nanocomposite membranes based on methacrylic random copolymers and magnetite nanoparticles

Savva, I.; Krekos, G.; Taculescu, A.; Marinica, O.; Vekas, L.; Krasia-Christoforou, T. (2012)

Magnetoresponsive polymer-based fibrous nanocomposites belonging to the broad category of stimuli-responsive materials, is a relatively new class of soft composite materials, consisting of magnetic nanoparticles embedded ...

Article

Identifying potential candidates for donor-acceptor copolymers on a series of 4H-1,2,6-thiadiazines: An electrochemical approach

Economopoulos, Solon P.; Koutentis, Panayiotis Andreas; Ioannidou, Heraklidia A.; Choulis, Stelios A. (2013)

A series of synthesized small organic molecules based on the 4H-1,2,6-thiadiazine moiety are studied using electrochemistry, to probe their potential as comonomer building blocks for solar-absorbing polymers for organic ...

Article

In vivo imaging of quantum dots encapsulated in phospholipid micelles

Dubertret, B.; Skourides, Paris A.; Norris, D. J.; Brivanlou, A. H.; Libchaber, A.; Noireaux, V. (2002)

Fluorescent semiconductor nanocrystals (quantum dots) have the potential to revolutionize biological imaging, but their use has been limited by difficulties in obtaining nanocrystals that are biocompatible. To address this ...

Article

An innovative synthesis approach toward the preparation of structurally defined multiresponsive polymer (co)networks

Achilleos, M.; Demetriou, M.; Marinica, O.; Vekas, L.; Krasia-Christoforou, T. (2014)

A new and facile synthesis approach employed for the fabrication of multiresponsive polymer conetworks characterized by predefined architecture and composition is described for the first time. The presented methodology ...

Article

Mechanical properties of structurally-defined magnetoactive polymer (co)networks

Mpekris, F.; Achilleos, M.; Vasile, E.; Vasile, E.; Krasia-Christoforou, T.; Stylianopoulos, T. (2015)

The mechanical properties of structurally-defined magnetoactive polymer (co)networks synthesized from well-defined poly(2-dimethylamino)ethyl methacrylate (poly(DMAEMA)) homopolymers and diblock copolymers of poly(DMAEMA) ...

Article

Poly(ethylene glycol)-based amphiphilic model conetworks: Synthesis by RAFT polymerization and characterization

Achilleos, Mariliz; Legge, T. M.; Perrier, S.; Patrickios, Costas S. (2008)

Polyethylene glycol) (PEG)-containing quasi-model amphiphilic polymer conetworks (APCNs) were prepared by reversible addition fragmentation chain transfer (RAFT) polymerization using α,ω-bis(2-cyanoprop-2-yl dithiobenzoate)-PEG ...

Article

Reversible hydrogels from amphiphilic polyelectrolyte model multiblock copolymers: The importance of macromolecular topology

Popescu, M. -T; Athanasoulias, I.; Tsitsilianis, C.; Hadjiantoniou, Natalie A.; Patrickios, Costas S. (2010)

The association ability of model amphiphilic polyelectrolytes with multi-block architecture, i.e. ABA, BABAB, ABABABA and BABABABAB (A hydrophobic, B polyelectrolyte block) was studied in aqueous media. The gelation ...

Article

Stimuli-Responsive amphiphilic polyelectrolyte heptablock copolymer physical hydrogels: An unusual ph-response

Popescu, M. -T; Tsitsilianis, C.; Papadakis, Christine M.; Adelsberger, J.; Balog, Sándor; Busch, P.; Hadjiantoniou, Natalie A.; Patrickios, Costas S. (2012)

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 ...

Article

Synthesis and aqueous solution characterization of amphiphilic diblock copolymers containing carbazole

Krasia‐Christoforou, Theodora; Patrickios, Costas S. (2002)

A series of near-monodisperse diblock copolymers of 2-(N-carbazolyl)ethyl methacrylate and 2-(dimethylamino)ethyl methacrylate (DMAEMA) of relatively low molecular weights (2600-24,000 g mol-1) were synthesized by group ...

Article

Synthesis and aqueous solution characterization of amphiphilic diblock copolymers containing carbazole

Krasia-Christoforou, T.; Patrickios, C. S. (2002)

A series of near-monodisperse diblock copolymers of 2-(N-carbazolyl)ethyl methacrylate and 2-(dimethylamino)ethyl methacrylate (DMAEMA) of relatively low molecular weights (2600-24,000 g mol-1) were synthesized by group ...

Article

Synthesis and aqueous solution characterization of novel diblock polyampholytes containing imidazole

Hadjikallis, G.; Hadjiyannakou, Stella C.; Vamvakaki, Maria; Patrickios, Costas S. (2002)

A series of diblock copolymers of 2-(1-imidazolyl)ethyl methacrylate and tetrahydropyranyl methacrylate (THPMA) were synthesized by group transfer polymerization using propylene carbonate rather than tetrahydrofuran as the ...

Article

Synthesis and characterization of amphiphilic conetworks based on multiblock copolymers

Hadjiantoniou, Natalie A.; Patrickios, Costas S. (2007)

Model amphiphilic conetworks based on cross-linked block copolymers of the hydrophilic ionizable 2-(dimethylamino)ethyl methacrylate (DMAEMA, 25 nominal units per block) and the hydrophobic n-butyl methacrylate (BuMA, 5 ...

Article

Synthesis and characterization of amphiphilic multiblock copolymers: Effect of the number of blocks on micellization

Hadjiantoniou, Natalie A.; Triftaridou, Aggeliki I.; Kafouris, Demetris; Gradzielski, M.; Patrickios, Costas S. (2009)

Five linear amphiphilic multiblock copolymers based on 2-(dimethylamino) ethyl methacrylate ("D") and methyl methacrylate ("M"), bearing from two to six blocks, were synthesized using sequential group transfer polymerization. ...

Article

Synthesis and characterization of amphiphilic star copolymers of 2-(dimethylamino)ethyl methacrylate and methyl methacrylate: Effects of architecture and composition

Themistou, Efrosyni; Patrickios, Costas S. (2007)

Six amphiphilic star copolymers comprising hydrophilic units of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and hydrophobic units of methyl methacrylate (MMA) were prepared by the sequential group transfer polymerization ...