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Browsing by Subject "cross linking"

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    • 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  

      Analytical separations in open-tubular capillary electrochromatography 

      Kapnissi‐Christodoulou, Constantina P.; Zhu, X.; Warner, I. M. (2003)
      This review represents a summary of recent progress in open-tubular capillary electro-chromatography (OT-CEC) for chiral and achiral separations. The OT-CEC approach is an alternative to packed-CEC that could eliminate the ...

    • 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  

      Cationic homopolymer model networks and star polymers: Synthesis by group transfer polymerization and characterization of the aqueous degree of swelling 

      Simmons, M. R.; Yamasaki, E. N.; Patrickios, Costas S. (2000)
      A series of hydrophilic model networks based on homopolymers of a weak base were prepared using group transfer polymerization (GTP) and characterized in terms of their aqueous degree of swelling as a function of pH. This ...

    • Article  

      Covalent amphiphilic polymer networks 

      Patrickios, Costas S.; Georgiou, Theoni K. (2003)
      The recent literature on chemically cross-linked amphiphilic polymer networks is reviewed. The main subjects covered are network synthesis, characterization, modeling and applications. Special mention is made to more modern ...

    • Article  

      Crosslink nature in Cr(III)-polyacrylamide gels 

      Vamvakaki, Maria; Yamasaki, E. N.; Hadjiyannakou, Stella C.; Patrickios, Costas S. (2001)
      The equilibrium constants of various candidates for the crosslinking reaction between chromium(III) and partly hydrolysed polyacrylamide have been calculated. For this purpose use has been made of a) the crosslinking index ...

    • Article  

      A dimethacrylate cross-linker cleavable under thermolysis or alkaline hydrolysis conditions: Synthesis, polymerization, and degradation 

      Elladiou, Marios; Patrickios, Costas S. (2016)
      We develop a new platform based on 2,6-pyridinediethanol diesters for introducing polymer degradability under thermolysis or alkaline hydrolysis conditions, with the latter being rare in polymers. Such labile diesters can ...

    • Article  

      Microphase separation in ABA triblock copolymer-based model conetworks in the bulk: Effect of loop formation 

      Karbarz, M.; Stojek, Z.; Georgiou, Theoni K.; Patrickios, Costas S. (2006)
      This work estimates the free energy and domain size and predicts the phase diagram of microphase-separated model polymer conetworks, consisting of end-linked ABA triblock copolymers with cross-link points of relatively low ...

    • Article  

      Nanoscopic cationic methacrylate star homopolymers: Synthesis by group transfer polymerization, characterization and evaluation as transfection reagents 

      Georgiou, Theoni K.; Vamvakaki, Maria; Patrickios, Costas S.; Yamasaki, E. N.; Phylactou, Leonidas A. (2004)
      Seven star polymers with degrees of polymerization (DPs) of the arms from 10 to 100 and dimensions in the nanometer range were prepared using sequential group transfer polymerization of 2-(dimethylamino)-ethyl methacrylate ...

    • Article  

      Randomly cross-linked homopolymer networks: Synthesis by group transfer polymerization in solution and characterization of the aqueous degree of swelling 

      Hadjiyannakou, Stella C.; Yamasaki, E. N.; Patrickios, Costas S. (2001)
      Randomly cross-linked homopolymer networks of 2-(dimethylamino)ethyl methacrylate (DMAEMA) of various average degrees of polymerization (DPs) between cross-links were synthesized by group transfer polymerization (GTP) in ...

    • Article  

      The role of the cross-link His-Tyr in the functional properties of the binuclear center in cytochrome c oxidase 

      Pinakoulaki, Eftychia; Pfitzner, U.; Ludwig, B.; Varotsis, Constantinos (2002)
      Resonance Raman and Fourier transform infrared spectroscopies have been used to study the aa3-type cytochrome c oxidase and the Y280H mutant from Paracoccus denitrificans. The stability of the binuclear center in the absence ...

    • Article  

      Structural effects of crosslinking a biopolymer hydrogel derived from marine mussel adhesive protein 

      Loizou, Elena; Weisser, J. T.; Dundigalla, A.; Porcar, L.; Schmidt, G.; Wilker, J. J. (2006)
      In an effort to explore new biocompatible substrates for biomedical technologies, we present a structural study on a crosslinked gelatinous protein extracted from marine mussels. Prior studies have shown the importance of ...

    • Article  

      A structural, kinetic model of soft tissue thermomechanics 

      Barocas, V. Η; Stylianopoulos, T.; Aksan, A. (2008)
      A structure-based kinetic model was developed to predict the thermomechanical response of collagenous soft tissues. The collagen fibril was represented as an ensemble of molecular arrays with cross-links connecting the ...

    • Article  

      Synthesis and characterization of electrolytic amphiphilic model networks based on cross-linked star polymers: Effect of star architecture 

      Vamvakaki, Maria; Patrickios, Costas S. (2002)
      Amphiphilic model networks of a new structure, that of cross-linked "in-out" star copolymers, were synthesized by a one-pot preparation using group-transfer polymerization. The networks comprised hydrophobic methyl ...

    • Article  

      Synthesis and characterization of novel networks with nano-engineered structures: Cross-linked star homopolymers 

      Vamvakaki, Maria; Hadjiyannakou, Stella C.; Loizidou, Efi; Patrickios, Costas S.; Armes, S. P.; Billingham, N. C. (2001)
      Group transfer polymerization was used for the one-pot preparation of a network structure comprising cross-linked star homopolymers. The structure contains many dangling chains (constituting the arms of the primary stars), ...

    • Article  

      Synthesis of triazafluoranthenones via silver(I)-mediated nonoxidative and oxidative intramolecular palladium-catalyzed cyclizations 

      Koutentis, Panayiotis Andreas; Loizou, G.; Lo Re, D. (2011)
      Silver(I) fluoride (AgF)-mediated intramolecular nonoxidative and oxidative palladium-catalyzed cyclizations of 1,3-diphenyl- and 8-iodo-1,3- diphenylbenzo[e][1,2,4]triazin-7(1H)-ones 6a (R = H) and 7a (R = I) afford a new ...

    • 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 ...

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