Felix A Plamper

Felix A Plamper
Technische Universität Bergakademie Freiberg · Institute of Physical Chemistry

Ph.D.

About

94
Publications
9,103
Reads
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3,606
Citations
Citations since 2017
25 Research Items
2078 Citations
20172018201920202021202220230100200300
20172018201920202021202220230100200300
20172018201920202021202220230100200300
20172018201920202021202220230100200300
Additional affiliations
October 2018 - present
Technische Universität Bergakademie Freiberg
Position
  • Professor
August 2009 - September 2018
RWTH Aachen University
Position
  • Scientific Coworker
September 2007 - July 2009
University of Helsinki

Publications

Publications (94)
Article
Though amphiphiles are ubiquitously used for altering interfaces, interfacial reorganization processes are in many cases obscure. For example, adsorption of micelles to liquid-liquid interfaces is often accompanied by rapid reorganizations toward monolayers. Then, the involved time scales are too short to be followed accurately. A block copolymer s...
Article
Variable interfacial tension could be desirable for many applications. Beyond classical stimuli like temperature, we introduce an electrochemical approach employing polymers. Hence, aqueous solutions of the nonionic-cationic block copolymer poly(ethylene oxide)114-b-poly{[2-(methacryloyloxy)ethyl]diisopropylmethylammonium chloride}171 (i.e., PEO114...
Article
We demonstrate a novel method to synthesize aqueous microgels with supramolecular redox-cleavable crosslinks. The redox-cleavable crosslinker was synthesized on the basis of host–guest interactions using methacrylate-modified β-cyclodextrin (host) and vinylferrocene (guest). A series of microgels with variable contents of a redox-cleavable crosslin...
Article
In this work, we synthesized electroactive and degradable microgels based on biomacromolecular building blocks, which enable the controlled release of therapeutic drugs. Functional chitosan-poly(hydroquinone) (Ch:PHQ) microgels exhibiting redox-active and pH-sensitive properties were synthesized by an oxidative polymerization in an inverse miniemul...
Article
The multi-liposomal conjugate with encapsulated enzyme laccase is described, capable of releasing the payload when changing the temperature. For this, thermosensitive cationic microgels were synthesized, differing in the molar content of cross-linker from 2 to 8 mol%. The microgels collapsed when heated beyond the volume phase transition temperatur...
Article
Microgels have versatile applications due to the possible functionalization with comonomers. We present the rational model-based design of synthesis procedures for vinylferrocene (VFc) containing poly(N-isopropylacrylamide) (PNIPAM) microgels with three different localizations of vinylferrocene in the microgel. First, we estimate kinetic copolymeri...
Article
Thermosensitive N-isopropylacrylamide based cationic microgels (μG) were synthesized and complexed with anionic liposomes containing encapsulated antitumor antibiotic Doxorubicin (Dox). Compositions of the resulting complexes, in terms of a liposome-to-μG number ratio N, varied from N = 0.5 to a saturated complex with N = 30 where the surface of μG...
Article
Full-text available
We propose a strategy to counteract the salt-driven disassembly of multiliposomal complexes made by electrostatic co-assembly of anionic small unilamellar liposomes and cationic star-shaped polyelectrolytes (made of quaternized poly(dimethylaminoethyl methacrylate) (qPDMAEMA100)3.1). The combined action of (qPDMAEMA100)3.1 and a nonionic star-shape...
Article
Full-text available
Complex‐forming copolymers (polymers whose monomeric units of different type attract each other) are often discussed to be a pathway to achieve self‐assembled structures, which differ from the classical micellization scheme. Here, coarse‐grained Monte Carlo simulations are performed to investigate the aggregation behavior of miktoarm star polymers/...
Article
Full-text available
We highlight microgel/enzyme thin films that were deposited onto solid interfaces via two sequential steps, the adsorption of temperature- and pH-sensitive microgels, followed by their complexation with the enzyme choline oxidase, ChO. Two kinds of functional (ionic) microgels were compared in this work in regard to their adsorptive behavior and in...
Article
Full-text available
The effect of polyelectrolyte composition on the electrodeposition onto platinum is investigated using a counterion switching approach. Film formation of preformed polyelectrolytes is triggered by oxidation of hexacyanoferrates(II) (ferrocyanide), leading to polyelectrolyte complexes, which are physically crosslinked by hexacyanoferrate(III) (ferri...
Article
Full-text available
The influence of spacer chains on the intramolecular complexation in star-shaped heteroarm (miktoarm) polymers is investigated. To overcome the mutual attraction of different polymeric components present in a miktoarm star with different homopolymeric arms, spacer chains of different length are attached to the core of the star at three different po...
Article
Conditional variations can lead to micellar transformations resulting in various (equilibrium) morphologies. However, creating differently shaped assemblies under the same final conditions (same ingredients, composition, temperature, etc.) is challenging. We present a thermoresponsive polyelectrolyte system allowing a pathway-dependent preparation...
Article
Near-equilibrium stimulus-responsive polymers have been used extensively to introduce morphological variations in dependence of adaptable conditions. Far-less-well studied are triggered transformations at constant conditions. These require the involvement of metastable states, which are either able to approach the equilibrium state after deviation...
Article
The kinetics of interpolyelectrolyte complexation involving architecturally complex (star-like) polymeric components is addressed. Specifically, the spontaneous coupling of branched cationic star-shaped miktoarm polymers, i.e., quaternized poly(ethylene oxide)114-(poly(2-(dimethylamino)ethyl methacrylate)17)4 (PEO114-(qPDMAEMA17)4), and temperature...
Article
A time-saving phase-diagram screening is introduced for the self-assembly of miktoarm star polymers with different arm numbers for the insoluble part. Agreeing with theory, all conventional micellar morphologies (spherical star-like micelles, cylindrical micelles and vesicles) can be accessed by adjusting the average arm number when blending miktoa...
Article
A versatile guest matrix was fabricated from a temperature- and pH-sensitive poly(N-isopropylacrylamide)-co-(3-(N,N-dimethylamino)propylmethacrylamide) microgel (poly(NIPAM-co-DMAPMA, MG) for the gentle incorporation of butyrylcholinesterase (BChE). The microgel/BChE films were built up on a surface of graphite-based screen-printed electrodes (SPEs...
Article
This study highlights the use of microgels as containers of high capacity for uptake and triggered release of multi-functional guests. As a model guest, heteroarm star-shaped copolymers (miktoarm stars) are chosen, as their certain arms could carry different active moieties, while other arms could act as “stickers” to the microgel host. Electrostat...
Article
We propose a strategy to adjust the size of multiliposomal complexes made of small unilamellar anionic liposomes (lipid bilayer vesicles prepared from zwitterionic lipid 1,2-dioleoyl-sn-glycerol-3-phosphocholine DOPC and ionic lipid 1-palmitoyl-2-oleoyl-sn-glycerol-3-phospho-l-serine POPS with a typical diameter of 50 nm) with cationic polymers due...
Article
Segregation is a well-known principle for micellization, as solvophobic components try to minimize interactions with other entities (such as solvent) by self-assembly. An opposite principle is based on complexation (or coacervation), leading to the coassembly/association of different components. Most cases in the literature rely on only one of thes...
Article
We present a smart liposome carrier system for stimulated release, consisting of cationic, thermo-responsive microgels. At low temperature, the swollen microgels adsorb about 200 anionic liposomes, 50 nm in diameter, per microgel. When heated from 39 °C to 41 °C, the microgel-liposome complex particles collapse from approx. 370 nm down to approx. 2...
Article
ConspectusMicrogels are macromolecular networks swollen by the solvent in which they are dissolved. They are unique systems that are distinctly different from common colloids, such as, e.g., rigid nanoparticles, flexible macromolecules, micelles, or vesicles. The size of the microgel networks is in the range of several micrometers down to nanometer...
Article
This study demonstrates the effect of polymer topology and molar mass on the electrodeposition of preformed polyelectrolytes. The polyelectrolyte solubility is manipulated electrochemically using a counterion switching approach. Upon this, a triggered film formation occurs upon oxidation of hexacyanoferrate(II). The resulting Pt-electrode deposit c...
Article
Full-text available
The intramolecular complex formation occurring in miktoarm star polymers and block copolymers is investigated experimentally and by means of Monte Carlo simulations. The driving force of the complex formation is an attractive interaction between the different blocks. In the simulations, a simple bead–spring model with an attractive Lennard-Jones po...
Article
The significance of inorganic main-group polymers is demonstrated most clearly by the commercial relevance of polysiloxanes (silicones). Organoboron-based materials such as π-conjugated organoborane polymers and BN-doped polycyclic aromatic hydrocarbons are currently attracting considerable attention. Surprisingly, poly(iminoborane)s (PIBs; [BRNR′]...
Article
Der hohe Stellenwert anorganischer Hauptgruppenpolymere spiegelt sich wohl am deutlichsten in der wirtschaftlichen Bedeutung von Polysiloxanen (Siliconen) wider. Bororganische Materialien wie π-konjugierte Organoboranpolymere oder BN-dotierte polycyclische aromatische Kohlenwasserstoffe erregen derzeit große Aufmerksamkeit. Daher ist es verwunderli...
Chapter
This chapter overviews the interpolyelectrolyte complex's (IPEC's) that are based on polyionic species with star-like topology and to demonstrate the important effects of such topology on the properties of the obtained macromolecular co-assemblies. The real challenge in current polymer science is the directed preparation of novel macromolecular arc...
Article
Full-text available
Microstructured hydrogel allows for a new template-guided method to obtain conductive nanowire arrays on a large scale. To generate the template, an imprinting process is used in order to synthesize the hydrogel directly into the grooves of wrinkled polydimethylsiloxane (PDMS). The resulting poly(N-vinylimidazole)-based hydrogel is defined by the P...
Article
Binding of pH-sensitive anionic liposomes to a star-shaped polycation provides accumulation of plenty of liposomes in a small volume and an increase in the rate and maximal amount of the pH-triggered content release.
Article
The spontaneous formation and thermo-responsiveness of a colloidally-stable interpolyelectrolyte complex (IPEC) based on a linear temperature-sensitive diblock copolymer poly(vinyl sulfonate)31-b-poly(N-isopropyl acrylamide)27 (PVS31-b-PNIPAM27) and a star-shaped quaternized miktoarm polymer poly(ethylene oxide)114-(poly(2-(dimethylamino)ethyl meth...
Article
Despite the great potential of both π-conjugated organoboron polymers and BN-doped polycyclic aromatic hydrocarbons in organic optoelectronics, our knowledge of conjugated polymers with B-N bonds in their main chain is currently scarce. Herein, the first examples of a new class of organic-inorganic hybrid polymers are presented, which consist of al...
Article
Der aktuelle Kenntnisstand über konjugierte Polymere mit B-N-Bindungen in der Hauptkette ist eher gering, ungeachtet des enormen Potenzials π-konjugierter Organoborpolymere und BN-dotierter polycyclischer aromatischer Kohlenwasserstoffe zur Anwendung in der organischen Optoelektronik. Hier werden die ersten Beispiele einer neuen Klasse organisch-an...
Article
Complexes were formed via the electrostatic interaction between 30-50 nm anionic liposomes and a star-shaped polyelectrolyte, poly{[2-(methacryloyloxy)ethyl]trimethyl ammonium iodide}, having cationic arms that radiate from a silicon-based central core. The complexation was investigated with attention given to assessing the capacity of the cationic...
Article
Microgels are flexible entities with a number of properties which can be tailored for a variety of applications. For redox-sensitive PNIPAM-based microgels involved in this study, the size and effective charge of microgels can be manipulated by electrochemical means. The electrochemical switching is implemented via interaction of redox-sensitive co...
Article
We report a novel approach to realize programmable encapsulation and following release of different compounds in a sequential way from multicompartmental microcapsules assembled from pre-formed polymersomes. The polymersomes, or polymeric vesicles, are formed through electrostatic interactions between a cationic miktoarm star polymer, namely poly(e...
Article
Full-text available
This work examines the adsorption regime and the properties of microgel and microgel/enzyme thin films deposited onto conductive graphite-based substrates. The films were formed via two-step sequential adsorption. A temperature- and pH-sensitive poly(N-isopropylacrylamide)-co-(3-(N,N-dimethylamino)propylmethacrylamide) microgel (poly(NIPAM-co-DMAPM...
Article
In this work we present the first e-microgel, whose size can be adjusted by application of an electrochemical potential, as seen by dynamic light scattering (3D-DLS in dependence of equilibrium potential) and scanning force microscopy (SFM). Hereby, polyelectrolyte microgels with attracted electroactive counterions provide an effective platform for...
Chapter
Star polyelectrolytes with responsive properties to external stimuli, such as pH, temperature and ionic condition, were utilized to fabricate layer-by-layer (LbL) microcapsules . The microstructure of star polyelectrolytes was first studied in semi-dilute solution by in situ small-angle neutron scattering (SANS). These measurements show that with t...
Article
The formation of copper nanoparticles (Cu-NPs) in irradiated aqueous solutions of star-shaped poly(acrylic acid) (PAA) were studied at two pH values. Transmission electron microscopy (TEM) demonstrates that the star-shaped macromolecules loaded with Cu2+ ions can act as individual nanosized containers and provide a perfect control over the size and...
Article
Binary diblock copolymers and corresponding ternary miktoarm stars are studied at oil-water interfaces. All polymers contain oil-soluble poly(propylene oxide) PPO, water-soluble poly(dimethylaminoethyl methacrylate) PDMAEMA and/or poly(ethylene oxide) PEO. The features of their Langmuir compression isotherms are well related to the ones of the corr...
Article
Star polymers with arms of two different homopolymers with a weak mutual attraction have been investigated using a coarse grained polymer model and Monte Carlo (MC) simulations. The effect of the polymer architecture on the complexation behavior has been studied for various numbers of arms (up to 8) starting from a diblock copolymer and compared to...
Article
The solvation of two differently composed linear statistical copolymers from N,N-diethyl acrylamide (DEAm) and N-isopropyl acrylamide is studied by Fourier-transform infrared spectroscopy. The solvent is changed from pure water to mixtures with methanol to investigate the cononsolvency effect. Furthermore, the influence of temperature and pressure...
Cover Page
Back Cover: Star polymers with arms of two different homopolymers with a weak mutual attraction are investigated using Monte Carlo simulations, and the effect of the polymer architecture on the complexation behavior of the polymers is studied. The star architecture promotes an internal complexation, which is indicated by a reduction of the end-to-e...
Article
Star polyelectrolytes (poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA)) with dual (temperature and pH) responsive properties were utilized to fabricate multiresponsive microcapsules via layer-by-layer (LbL) assembly. The LbL microcapsules are very robust and uniform, with higher stability and different internal structure compared with conventio...
Article
This study effectively demonstrates that thermoresponsive, cationic microgels act as selective, closable carriers for trivalent hexacyanoferrate(III) (ferricyanide). At the same time, the microgel disregards even higher charged hexacyanoferrate(II) (ferrocyanide). This is seen by investigating the electrochemistry of hexacyanoferrates in presence o...
Article
Full-text available
This work examines the fabrication regime and the properties of microgel and microgel/enzyme thin films adsorbed onto conductive substrates (graphite or gold). The films were formed via two-steps: sequential adsorption of a temperature- and pH-sensitive microgel synthesized by precipitation copolymerization of N-isopropylacrylamide (NIPAM) and 3-(N...
Article
Developments in the area of electrochemical manipulation of polymers are reviewed, with an emphasis on soft condensed matter (with some weight on aqueous systems). Electrochemical control of polymer solubility is a current issue, with applications in smart colloids, gels, and self-assembled systems. Electrode modification is addressed briefly. Diff...
Article
The thermoresponsive and pH-sensitive behavior of poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA), poly(N,N-diethylaminoethyl methacrylate) (PDEAEMA) and poly(N,N-diisopropylaminoethyl methacrylate) (PDiPAEMA) is compared by use of different techniques. We employed temperature- and pH-dependent turbidimetry, fluorescence spectroscopy (of the po...
Article
The thermoresponsive and pH-sensitive behavior of poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA), poly(N,N-diethylaminoethyl methacrylate) (PDEAEMA), and poly(N,N-diisopropylaminoethyl methacrylate) (PDiPAEMA) is compared by use of different techniques. We employed temperature- and pH-dependent turbidimetry, fluorescence spectroscopy (of the p...
Article
Anionic liposomes are electrostatically complexed to a star-shaped cationic polyelectrolyte. Upon complexation, the liposomes retain their integrity and the resulting liposome-star complexes do not dissociate in a physiological solution with 0.15 M NaCl. This provides a multi-liposomal container for possible use as a high-capacity carrier. Adsorpti...
Article
A cationic microgel with quaternized amine groups was prepared and used as a soft template for layer-by-layer (LbL) assemblies. The presence of quaternized amine groups inside the microgels was necessary to prevent rearrangements and subsequent bridging between the coated microgels, which were observed for the precursor microgels containing protona...
Article
The recent advances in polymerizations under electrochemical control are reviewed. Here, emphasis is laid not only on chain-growth polymerizations but also step-growth polymerizations and polymer modification are addressed. Relatedly, the latest developments in electrochemically controlled surface patterning are highlighted. In most cases, the scop...
Article
Poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) star polyelectrolytes with dual thermo- and pH-responsive properties have been studied by in situ small-angle neutron scattering at different temperatures and pH conditions in order to reveal their conformational changes in semidilute solution. At pH values close to the pKa, all PDMAEMA stars stud...
Article
Full-text available
The influence of architecture on polymer interactions is investigated and differences between branched and linear copolymers are found. A comprehensive picture is drawn with the help of a fluorescence approach (using pyrene and 4HP as probe molecules) together with IR or NMR spectroscopy and X-ray/light scattering measurements. Five key aspects are...
Article
The versatility of polymer and hybrid systems containing the polycation PDMAEMA, especially in the star-shaped topology, is reviewed. Different complexation schemes are addressed, including the use of stimuli-responsive counterions. This leads to the use of PDMAEMAstars for nucleotide transfection or advanced hydrogel formulations.
Article
The versatility of polymer and hybrid systems containing the polycation PDMAEMA, especially in the star-shaped topology, is reviewed. Different complexation schemes are addressed, including the use of stimuli-responsive counterions. This leads to the use of PDMAEMAstars for nucleotide transfection or advanced hydrogel formulations.
Article
Femtosecond fluorescence up-conversion spectroscopy of two azobenzenes covalently attached to the side chain or linked by covalent bonds at each end into the main chain of polybutylmethacrylate polymer colloids with different cross-linking ratios reveals dramatic differences in the excited-state dynamics compared to the monomer chromophores in solu...
Article
Janus-like co-assemblies are expected if non-centrosymmetric host macromolecules are used as precursors. As a natural choice, bis-hydrophilic ionic/non-ionic macromolecules can be complexed with linear homopolyelectrolytes, generating interpolyelectrolyte complexes (IPECs). At the same time, complexation-induced aggregation could result in centrosy...
Article
We present a theory of a conformational collapse-to-swelling transition that occurs in aqueous dispersions of multiresponsive (pH- and thermoresponsive) microgels upon variation of ionic strength, temperature, or pH. Our theory is based on osmotic balance arguments and explicitly accounts for ionization equilibrium inside microgel partices. The the...
Article
Ihre besondere Struktur verleiht sternförmigen Polymermolekülen außergewöhnliche Eigenschaften. Geladene Sternpolymere reagieren auf äußere Einflüsse wie pH-Wert, Temperatur oder Licht und eignen sich gerade für Anwendungen in der Biomedizin.
Article
We investigated thermosensitive poly(N-isopropylacrylamide) microgels by high-pressure small angle X-ray scattering and Fourier-transform IR spectroscopy below and above the collapse temp. The measurements reveal little pressure-induced deswelling below the vol. phase transition temp. and clear re-swelling of the collapsed gels at temps. above the...
Article
The prepn. of miktoarm stars, based on poly(ethylene oxide) (PEO), poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) and either poly(propylene oxide) (PPO) or poly(Et glycidyl ether) (PEGE), is described. Hereby, partly protected dipentaerythritol (dipentaerythritoldiacetonide) is used as a bifunctional alc. in a polymer-based Williamson ether sy...
Article
Mixing a bis-hydrophilic, cationic miktoarm star polymer with a linear polyanion leads to the formation of unilamellar polymersomes, which consist of an interpolyelectrolyte complex (IPEC) wall sandwiched between poly(ethylene oxide) brushes. The experimental finding of this rare IPEC morphology is rationalized theoretically: the star architecture...
Article
A non-destructive way to achieve remote, reversible, light-controlled tunable permeability of ultrathin shell microcapsule is demonstrated in this study. Microcapsules based on poly{[2-(methacryloyloxy)ethyl] trimethylammonium iodide} (PMETAI) star polyelectrolyte and poly(sodium 4-styrenesulfonate) (PSS) were prepared by a layer-by-layer (LbL) tec...
Article
Aqueous dispersions of homo- and copolymer microgels of N-isopropylacrylamide (NiPAm) and N,N-diethylacrylamide (DEAm) with different compositions are temperature-dependently studied by means of proton nuclear magnetic resonance spectroscopy (1H NMR) and differential scanning calorimetry (DSC). Furthermore, the effect of varying the solvent composi...
Article
Statistical copolymers of N-isopropyl acrylamide (NIPAM) and N,N-diethyl acrylamide (DEAAM) show a pronounced synergistic depression in their cloud points, though both homopolymers phase separate at significantly higher temperatures close to 30 °C (e.g., Polymer2009, 50, 519). While phase separation occurs at 20 °C for the statistical copolymers, t...
Article
A noncentrosymmetric, star-shaped polymeric system is presented, which forms unimolecular micelles upon complexation of poly(propylene oxide) (PPO) with poly(dimethylaminoethyl methacrylate) (PDMAEMA). The influence of macromolecular architecture on the hydrophobicity of PPO and its interaction with PDMAEMA is investigated. Within stars, a complex...
Article
Full-text available
We report on the detailed structure of MnOx nanoparticles (MnOx NP) which are either stabilized by cationic spherical polyelectrolyte brushes or by star-shaped cationic polyelectrolyte chains. In both cases, the polycation is composed of 2-(trimethylammonium)ethyl methacrylate chloride (TMAEMC). The analysis by transmission electron microscopy (TEM...
Article
We report the unique layer-by-layer (LbL) assembly behavior of pH-sensitive star-shaped polyelectrolytes with both linear and exponential growth modes controlled by star architecture and assembly conditions. Cationic poly[2-(dimethylamino)ethyl methacrylate] and anionic poly(acrylic acid) stars were synthesized via "core-first" atom-transfer radica...
Article
The synthesis of star-shaped polymers, which are threaded regularly along a common backbone, is described. Thus, two different approaches for preparation of so-called pearl necklace polymers (synonyms: multigraft copolymers, barbwire or centipedes polymers, multiple dumbbells or star-oligomers) are presented. Poly(ethylene oxide) (PEO) was used as...
Article
This review summarizes recent work in the field of polyelectrolyte stars and cylindrical brushes. Synthesis of anionic and cationic polyelectrolyte stars and cylindrical brushes by different synthetic strategies is introduced. Solution properties such as titration, osmotic pressure, and inter-polyelectrolyte complexes (IPECs) of the stars and brush...
Chapter
This review summarizes recent work in the field of polyelectrolyte stars and cylindrical brushes. Synthesis of anionic and cationic polyelectrolyte stars and cylindrical brushes by different synthetic strategies is introduced. Solution properties such as titration, osmotic pressure, and inter-polyelectrolyte complexes (IPECs) of the stars and brush...
Article
Silica is an important mineral in biology and technology, and many protocols have been developed for the synthesis of complex silica architectures. The current report shows that silsesquioxane nanoparticles carrying polymer arms on their surface are efficient templates for the fabrication of silica particles with a star- or raspberry-like morpholog...
Article
A novel method for preparation of miktoarm stars is presented, first employing Williamson ether synthesis with protected dipentaerythritol and preformed poly(ethylene oxide) (PEO) as reactants. This arm-first reaction gave, after modification, PEO macroinitiators with 4 or 6 initiation sites, which are located in the center of the main chain. The i...
Article
pH- and salinity-responsive organic–inorganic nanohybrid stars based on poly(acrylic acid) (PAA) stars and N,N-di(2,3-dihydroxypropyl)3-aminopropylfunctional silsesquioxane nanoparticles are readily formed by mixing of aqueous solutions of the components. The interaction between stars of two different arm lengths, (PAA100)21, (PAA200)24, with water...
Article
The most important problem of the modern physical chemistry of high-molecular-weight compounds is designing nanosized macromolecular structures of new architecture. One of the approaches is based on macromolecular self-assembly and self-organization in multicomponent polymeric systems. A striking example of such processes is formation of interpolye...
Chapter
Star polymers and cylindrical polymer brushes (CPBs), i.e. polymers possessing side groups densely grafted from a linear main chain, have attracted considerable experimental and theoretical interest over the past decade, owing to their peculiar solution and bulk properties. We have used the grafting-from approach via ATRP to synthesize well-defined...
Article
The interaction of star-shaped poly(acrylic acid) having various numbers of arms (5, 8, and 21) and a strong cationic polyelectrolyte, viz., poly( N-ethyl-4-vinylpyridinium bromide), was examined at pH 7 by means of turbidimetry and dynamic light scattering. Mixing aqueous solutions of the oppositely charged polymeric components was found to result...