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Browsing by Subject "copolymer"

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    • 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  

      Aqueous size exclusion chromatography of random, diblock, and ABC triblock methacrylic polyampholytes 

      Patrickios, Costas S.; Strittmatter, J. A.; Hertler, Walter R.; Hatton, T. Alan (1996)
      Aqueous size exclusion chromatography (SEC) at 1 M KCl and pH 8.5 was employed to probe the aggregation behavior of methacrylic polyampholytes. In agreement with earlier results obtained by light scattering techniques, ...

    • Article  

      Cationic amphiphilic model networks based on symmetrical ABCBA pentablock terpolymers: Synthesis, characterization, and modelling 

      Triftaridou, Aggeliki I.; Vamvakaki, Maria; Patrickios, Costas S. (2007)
      Eight isomeric networks based on equimolar terpolymers were synthesized using group transfer polymerization (GTP) and were characterized in terms of their swelling properties. Two hydrophilic monomers, the nonionic methoxy ...

    • Article  

      Cationic double-hydrophilic model networks: Synthesis, characterization, modeling and protein adsorption studies 

      Loizou, Elena; Triftaridou, Aggeliki I.; Georgiou, Theoni K.; Vamvakaki, Maria; Patrickios, Costas S. (2003)
      Group transfer polymerization (GTP) was used for the preparation of eight networks based on two hydrophilic monomers, 2-(dimethylamino)ethyl methacrylate (DMAEMA) and poly(ethylene glycol) methacrylate (PEGMA). Ethylene ...

    • Article  

      Controlled synthesis of homopolymers and block copolymers based on 2-(acetoacetoxy)ethyl methacrylate via RAFT radical polymerisation 

      Krasia-Christoforou, T.; Soula, R.; Börner, H. G.; Schlaad, H. (2003)
      Reversible addition-fragmentation chain transfer (RAFT) radical polymerisation enables to synthesise well-defined homopolymers and block copolymers based on 2-(acetoacetoxy)ethyl methacrylate, which are capable to strongly ...

    • Article  

      Direct observation of ultrafast long-range charge separation at polymer-fullerene heterojunctions 

      Provencher, F.; Bérubé, N.; Parker, A. W.; Greetham, G. M.; Towrie, M.; Hellmann, C.; Côté, M.; Stingelin, N.; Silva, C.; Hayes, Sophia C. (2014)
      In polymeric semiconductors, charge carriers are polarons, which means that the excess charge deforms the molecular structure of the polymer chain that hosts it. This results in distinctive signatures in the vibrational ...

    • 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  

      Microphase separation under constraints: A molecular thermodynamic theory for polyelectrolytic amphiphilic model networks in water 

      Georgiou, Theoni K.; Vamvakaki, Maria; Patrickios, Costas S. (2004)
      The aqueous aggregation behavior of covalent model networks comprising amphiphilic ABA triblock copolymers with hydrophilic ionic mid-blocks and hydrophobic non-ionic end-blocks was studied by formulating a molecular ...

    • Article  

      Superparamagnetic hybrid micelles, based on iron oxide nanoparticles and well-defined diblock copolymers possessing β-ketoester functionalities 

      Papaphilippou, P.; Loizou, L.; Popa, N. C.; Han, A.; Vekas, L.; Odysseos, A.; Krasia-Christoforou, T. (2009)
      The quality of surface coating of magnetic nanoparticles destined as nanoprobes in clinical applications is of utmost significance for their colloidal stability and biocompatibility. A novel approach for the fabrication ...

    • 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 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 catalytically active homopolymers, block copolymers and networks containing imidazole 

      Patrickios, Costas S.; Simmons, M. R. (2000)
      Imidazole-containing polymers were prepared and characterized in terms of their hydrolytic activity. Unlike similar materials synthesized in the 1960s, the polymers are of precise molecular weight and controlled structure ...

    • 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, characterization and evaluation of amphiphilic star copolymeric emulsifiers based on methoxy hexa(ethylene glycol) methacrylate and benzyl methacrylate 

      Hadjiyannakou, Stella C.; Triftaridou, Aggeliki I.; Patrickios, Costas S. (2005)
      Amphiphilic star copolymers were synthesized by sequential monomer and cross-linker additions using group transfer polymerization (GTP). Benzyl methacrylate (BzMA) and methoxy hexa(ethylene glycol) methacrylate (HEGMA) ...

    • Article  

      Synthesis, characterization, and DNA adsorption studies of ampholytic model conetworks based on cross-linked star copolymers 

      Georgiou, Theoni K.; Patrickios, Costas S. (2008)
      Five model conetworks based on cross-linked star ampholytic copolymers were synthesized by group transfer polymerization. The ampholytic copolymers were based on two hydrophilic monomers: the positively ionizable ...

    • Article  

      Synthesis, characterization, and evaluation as transfection reagents of ampholytic star copolymers: Effect of star architecture 

      Georgiou, Theoni K.; Phylactou, Leonidas A.; Patrickios, Costas S. (2006)
      Five star polymers based on the positively ionizable hydrophilic 2-(dimethylamino)ethyl methacrylate (DMAEMA) and the hydrophobic but hydrolyzable tetrahydropyranyl methacrylate (THPMA) were prepared by group-transfer ...

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