Browsing by Subject "Polymerization"

Article

2-(Pyridin-2-yl)ethanol as a protecting group for carboxylic acids: Chemical and thermal cleavage, and conversion of poly[2-(pyridin-2-yl)ethyl methacrylate] to poly(methacrylic acid)

Elladiou, Marios; Patrickios, Costas S. (2012)

In this communication, we show that 2-(pyridin-2-yl)ethanol is a good protecting group for methacrylic acid (MAA), which can be selectively removed, after polymerization, either chemically under alkaline conditions or ...

Article

ABC triblock polymethacrylates: Group transfer polymerization synthesis of the ABC, ACB, and BAC topological isomers and solution characterization

Patrickios, Costas S.; Lowe, A. B.; Armes, S. P.; Billingham, N. C. (1998)

ABC triblock copolymers of methyl methacrylate (MMA), (dimethylamino)-ethyl methacrylate (DMAEMA), and tetrahydropyranyl methacrylate (THPMA) consisting of 12 units of each type of monomer were synthesized by group transfer ...

Article

ABC Triblock Terpolymers with Orthogonally Deprotectable Blocks: Synthesis, Characterization, and Deprotection

Elladiou, Marios; Patrickios, Costas S. (2015)

The development and availability of new protecting groups are vital for all branches of synthetic chemistry. Equally vital is the facile and selective removal of these groups, leaving intact other protecting groups which ...

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 Polymer Conetworks Based on Interconnected Hydrophobic Star Block Copolymers: Synthesis and Characterization

Kepola, Eleni J.; Kyriacou, Kyriacos C.; Patrickios, Costas S.; Simon, Miriam; Gradzielski, M.; Kushnir, M.; Wesdemiotis, Chrystostomos (2017)

Herein we report on the preparation and structural characterization of six amphiphilic polymer conetworks (APCN) based on end-linked amphiphilic “core-first” star block copolymers, comprising methyl methacrylate and ...

Article

Benzotriazinyl‐mediated controlled radical polymerization of styrene

Demetriou, Maria; Berezin, Andrey A.; Koutentis, Panayiotis Andreas; Krasia‐Christoforou, Theodora (2013)

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 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

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 star polymer siRNA transfectants interconnected with a piperazine-based cationic cross-linker

Pafiti, Kyriaki S.; Patrickios, Costas S.; Georgiou, Theoni K.; Yamasaki, E. N.; Mastroyiannopoulos, Nikolaos P.; Phylactou, Leonidas A. (2012)

Cationic star polymers of 2-(dimethylamino)ethyl methacrylate (DMAEMA) were prepared via the "arm-first" method under group transfer polymerization (GTP) conditions, and were interconnected using a novel, hydrophilic, ...

Article

Cationic telechelic polyelectrolytes: Synthesis by group transfer polymerization and self-organization in aqueous media

Gotzamanis, G. T.; Tsitsilianis, C.; Hadjiyannakou, Stella C.; Patrickios, Costas S.; Lupitskyy, R.; Minko, S. (2006)

ABA triblock copolymers comprising a relative long poly(2-(dimethylamino) ethyl methacrylate) end-capped by short poly(methyl methacrylate) blocks (PMMA-b-PDMAEMA-b-PMMA) were synthesized using group transfer polymerization ...

Article

A degradable atom transfer radical polymerization inimer: Synthesis, polymerization, and cleavage of the resulting polymer products

Elladiou, Marios; Patrickios, Costas S. (2017)

A novel degradable inimer for atom transfer radical polymerization (ATRP), 2-(6-(2-((2-bromo-2-methylpropanoyl)oxy)ethyl)pyridin-2-yl)ethyl methacrylate (PyDEBrMΑ), was synthesized by the two-step esterification of ...

Article

Degradable polymer networks and star polymers based on mixtures of two cleavable dimethacrylate crosslinkers: Synthesis, characterization, and degradation

Themistou, Efrosyni; Patrickios, Costas S. (2009)

Mixtures of two cleavable dimethacrylate crosslinkers, the hydrolyzable di(methacryloyloxy-1-ethoxy)methane (DMOEM) and the thermolyzable 1,1-ethylenediol dimethacrylate (EDDMA), were used for the preparation of neat ...

Article

Diblock, ABC Triblock, and Random Methacrylic Polyampholytes: Synthesis by Group Transfer Polymerization and Solution Behavior

Patrickios, Costas S.; Hertler, Walter R.; Abbott, Nicholas L.; Hatton, T. Alan (1994)

Water-soluble, low-polydispersity, low-molecular-weight random, AB diblock, and ABC triblock polymers of methacrylic acid (MAA), 2- (dimethylamino) ethyl methacrylate (DMAEMA), methyl methacrylate (MMA) and 2-phenylethyl ...

Book Chapter

Dimerization and polymerization of enones in the fluid and solid states

Theocharis, Charis R. (John Wiley and Sons Inc., 2010)

Article

Double-networks based on pH-responsive, amphiphilic "core-first" star first polymer conetworks prepared by sequential RAFT polymerization

Kitiri, E. N.; Patrickios, Costas S.; Voutouri, Chrysovalantis; Stylianopoulos, Triantafyllos; Hoffmann, I.; Schweins, R.; Gradzielski, M. (2017)

This manuscript presents the preparation and study of a new double-network hydrogel system, comprising an amphiphilic, pH-responsive first polymer conetwork synthesized via reversible addition-fragmentation chain transfer ...

Article

Double-networks based on pH-responsive, amphiphilic "core-first" star first polymer conetworks prepared by sequential RAFT polymerization

Kitiri, E. N.; Patrickios, C. S.; Voutouri, C.; Stylianopoulos, T.; Hoffmann, I.; Schweins, R.; Gradzielski, M. (2017)

This manuscript presents the preparation and study of a new double-network hydrogel system, comprising an amphiphilic, pH-responsive first polymer conetwork synthesized via reversible addition-fragmentation chain transfer ...

Article

Enamine-Based Hydrophilic Dynamic Covalent Polymer Networks: Effects of pH, and Copolymer Composition and Concentration on the Aqueous Swelling Degrees and the Gel Formation Times

Apostolides, Demetris E.; Hadjicosta, A.; Patrickios, Costas S. (2015)

In this work, we explore the formation in water of dynamic covalent polymer networks cross-linked via enamine groups. The polymer networks resulted from the combination of pairs of chemically complementary hydrophilic ...

Article

Hydrophilic, cationic large-core star polymers and polymer networks: Synthesis and physicochemical characterization

Kafouris, Demetris; Gradzielski, M.; Patrickios, Costas S. (2008)

Group transfer polymerization was used to prepare hydrophilic, cationic large-core star polymers (LCSPs) and networks of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and ethylene glycol dimethacrylate (EGDMA) in a two-step ...

Article

In situ polymerised polyamide 6/sepiolite nanocomposites: Effect of different interphases

Bilotti, E.; Duquesne, E.; Deng, H.; Zhang, R.; Quero, F.; Georgiades, Savvas N.; Fischer, H. R.; Dubois, P.; Peijs, T. (2014)

The success of a polymer/clay nanocomposite depends from a number of factors including the intrinsic properties of the clay, nanofiller dispersion and orientation, matrix/filler interactions, etc. This manuscript focuses ...