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Browsing by Subject "Swelling"

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    • Article  

      Anionic amphiphilic end-linked conetworks by the combination of quasiliving carbocationic and group transfer polymerizations 

      Kali, Gergely; Georgiou, Theoni K.; Iván, B.; Patrickios, Costas S. (2009)
      A series of amphiphilic end-linked conetworks was synthesized by the combination of two "quasiliving" polymerization techniques, quasiliving carbocationic (QLCCP) and group transfer polymerizations (GTP). The hydrophobic ...

    • Article  

      Cationic amphiphilic model networks: Synthesis by group transfer polymerization and characterization of the degree of swelling 

      Simmons, M. R.; Yamasaki, E. N.; Patrickios, Costas S. (2000)
      Group transfer polymerization (GTP) was applied to prepare model networks based on 2-(dimethylamino)ethyl methacrylate (DMAEMA) and methyl methacrylate (MMA). The flexibility of GTP allowed the synthesis of three isomeric ...

    • Article  

      Converged solutions of the Newtonian extrudate-swell problem 

      Georgiou, Georgios C.; Boudouvis, Andreas G. (1999)
      Both the axisymmetric and the planar Newtonian extrudate-swell problems are solved using the standard and the singular finite element methods. In the latter method, special elements that incorporate the radial form of the ...

    • Article  

      Degradable amphiphilic end-linked conetworks with aqueous degradation rates determined by polymer topology 

      Rikkou-Kalourkoti, Maria D.; Loizou, Elena; Porcar, L.; Butler, P.; Patrickios, Costas S. (2009)
      Degradable amphiphilic conetworks, based on end-linked amphiphilic ABA triblock copolymers with a labile fragment in the middle, were synthesized by sequential group transfer polymerization (GTP) of monomers and cross-linker, ...

    • Article  

      End-linked amphiphilic polymer conetworks: synthesis by sequential atom transfer radical polymerization and swelling characterization 

      Rikkou-Kalourkoti, Maria D.; Kolokasi, Maria; Matyjaszewski, K.; Patrickios, Costas S. (2010)
      Conetworks based on end-linked homopolymers and amphophilic gradient copolymers were synthesized by the atom transfer radical polymerization (ATRP) of 2-(dimethylamino)ethyl methaerylate (DMAEMA, hydrophilic monomer), ...

    • Article  

      Experimental measurements and mathematical modeling towards quantification of brain swelling stress 

      Angeli, S.; Stylianopoulos, T. (2017)
      Traumatic brain injury results in brain tissue swelling which can be a life threatening condition due to skull confinement. While previous efforts successfully measured the exhibited volume change in brain tissue swelling, ...

    • Article  

      Fabrication and characterization of superparamagnetic and thermoresponsive hydrogels based on oleic-acid-coated Fe3O4 nanoparticles, hexa(ethylene glycol) methyl ether methacrylate and 2-(acetoacetoxy)ethyl methacrylate 

      Papaphilippou, P.; Pourgouris, A.; Marinica, O.; Taculescu, A.; Athanasopoulos, G. I.; Vekas, L.; Krasia-Christoforou, T. (2011)
      Stimuli-responsive hydrogel nanocomposites comprised of swollen polymer networks, in which magnetic nanoparticles are embedded, are a relatively new class of "smart" soft materials presenting a significant impact on various ...

    • Article  

      Group transfer polymerization in the bulk: Linear polymers and randomly cross-linked networks 

      Yamasaki, E. N.; Patrickios, Costas S. (2003)
      Linear homopolymers and randomly cross-linked homopolymer networks of 2-(dimethylamino)ethyl methacrylate of various molecular weights (MWs) were synthesized by group transfer polymerization in the bulk. 1-methoxy-1-(tri ...

    • Article  

      Multi-functional conetworks based on cross-linked star polymers 

      Georgiou, Theoni K.; Achilleos, Demetra S.; Patrickios, Costas S. (2010)
      Three series of conetworks based on cross-linked star polymers of different architectures were prepared using group transfer polymerization. The first series of conetworks were amphiphilic, based on the hydrophobic monomer ...

    • Article  

      Numerical simulation of the extrusion of strongly compressible Newtonian liquids 

      Taliadorou, Eleni G.; Georgiou, Georgios C.; Mitsoulis, Evan C. (2008)
      The axisymmetric and plane extrusion flows of a liquid foam are simulated assuming that the foam is a homogeneous compressible Newtonian fluid that slips along the walls. Compressibility effects are investigated using both ...

    • 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  

      Polyelectrolytic amphiphilic model networks in water: A molecular thermodynamic theory for their microphase separation 

      Vamvakaki, Maria; Patrickios, Costas S. (2002)
      The aqueous aggregation behavior of networks comprising hydrophilic ionic blocks and hydrophobic nonionic blocks was studied by formulating a molecular thermodynamic theory, which considers the Gibbs free energies of the ...

    • Article  

      Polymer networks: Recent developments 

      Patrickios, Costas S. (2010)
      Polymer networks have long been the subject of study by chemists, physicists, biologists, material scientists and engineers, aiming to understand the fundamentals of their preparation and behavior, but also to adopt them ...

    • Article  

      Recurrent episodes of recall dermatitis of irradiated breast after LHRH agonist administration 

      Kostadima, Lida; Pentheroudakis, George; Pavlidis, Nicholas (2011)

    • Article  

      Regular and inverse polyampholyte hydrogels: A detailed comparison 

      Constantinou, Anna P.; Elladiou, Marios; Patrickios, Costas S. (2016)
      Two series of polyampholyte (PA) hydrogels were prepared via reversible addition-fragmentation chain transfer polymerization, followed by removal of the protecting group of the acidic monomer repeating units (methacrylic ...

    • Article  

      The steady annular extrusion of a Newtonian liquid under gravity and surface tension 

      Housiadas, Kostas D.; Georgiou, Georgios C.; Tsamopoulos, J. (2000)
      The steady extrusion of a Newtonian liquid through an annular die and its development outside and away from the die are studied under the influence of gravitational and surface tension forces. The finite element method ...

    • Article  

      A study of various factors affecting Newtonian extrudate swell 

      Mitsoulis, Evan C.; Georgiou, Georgios C.; Kountouriotis, Zacharias (2012)
      Finite-element simulations have been undertaken for the benchmark problem of extrudate swell present in extrusion. Both cases of planar and axisymmetric domains were considered under laminar, isothermal, steady-state ...

    • 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 characterization of double-hydrophilic model networks based on cross-linked star polymers of poly(ethylene glycol) methacrylate and methacrylic acid 

      Georgiades, Savvas N.; Vamvakaki, Maria; Patrickios, Costas S. (2002)
      A series of model networks based on cross-linked star polymers of poly(ethylene glycol) methacrylate (PEGMA) and tetrahydropyranyl methacrylate (THPMA), a protected form of methacrylic acid (MAA), were synthesized by group ...

    • Article  

      Synthesis and characterization of the swelling and mechanical properties of amphiphilic ionizable model co-networks containing n-butyl methacrylate hydrophobic blocks 

      Vamvakaki, Maria; Patrickios, Costas S. (2008)
      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 ...

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