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Monodisperse PEGylated Spheres: An Aqueous Colloidal Model System

Ulama, Jeanette; Zackrisson Oskolkova, Malin; Bergenholtz, Johan

Customer publications

Monodisperse PEGylated Spheres: An Aqueous Colloidal Model System

Ulama, Jeanette; Zackrisson Oskolkova, Malin; Bergenholtz, Johan

Fluorinated core?shell spheres have been synthesized using a novel semibatch emulsion polymerization protocol employing slow feeding of the initiator. The synthesis results in aqueous dispersions of highly monodisperse spheres bearing a well-defined poly(ethylene glycol) graft (PEGylation). Measurements are consistent with the synthesis achieving a high grafting density that moreover consists…
Influence of the Main-Chain Configuration on the Mechanical Properties of Linear Aliphatic Polyesters

Pepels, Mark P. F.; Govaert, Leon E.; Duchateau, Rob

Customer publications

Influence of the Main-Chain Configuration on the Mechanical Properties of Linear Aliphatic Polyesters

Pepels, Mark P. F.; Govaert, Leon E.; Duchateau, Rob

Linear aliphatic polyesters have been investigated extensively over the last decades. However, the relation between the configuration of the ester groups in the main chain and the mechanical properties is only poorly understood. Therefore, in this work the influence of the composition of these polymers on the morphology, mechanical properties…
Mechanically induced tilt in smectic-A elastomers

Kramer, Dominic; Finkelmann, Heino

Customer publications

Mechanically induced tilt in smectic-A elastomers

Kramer, Dominic; Finkelmann, Heino

Recently it has been predicted that shear forces can unlock the director and the layer normal in smectic-A elastomers, leading to a smectic-C like tilt analogous to the electroclinic effect of chiral SA* phases. In order to investigate this phenomenon, we present detailed X-ray investigations of SA elastomers under shear,…
Simultaneous SAXS/WAXS/UV–Vis Study of the Nucleation and Growth of Nanoparticles: A Test of Classical Nucleation Theory

Chen, Xuelian; Schröder, Jan; Hauschild, Stephan; Rosenfeldt, Sabine; Dulle, Martin; Förster, Stephan

Customer publications

Simultaneous SAXS/WAXS/UV–Vis Study of the Nucleation and Growth of Nanoparticles: A Test of Classical Nucleation Theory

Chen, Xuelian; Schröder, Jan; Hauschild, Stephan; Rosenfeldt, Sabine; Dulle, Martin; Förster, Stephan

Despite the increasing interest in the applications of functional nanoparticles, a comprehensive understanding of the formation mechanism starting from the precursor reaction with subsequent nucleation and growth is still a challenge. We for the first time investigated the kinetics of gold nanoparticle formation systematically by means of a lab-based in…
Die-drawn HDPE pipes: Crystalline and Lamellae Orientation

Kleppinger, Ralf; Taraiya, Ajay; Handstanger, Ralph; Soliman, Maria

Customer publications

Die-drawn HDPE pipes: Crystalline and Lamellae Orientation

Kleppinger, Ralf; Taraiya, Ajay; Handstanger, Ralph; Soliman, Maria

It is well known that mechanical properties of isotropic polymer systems, such as tensile modulus and strength, can be considerably improved by orientation of chain molecules. This can be achieved by deforming the polymer in the solid-state via die-drawing, resulting in orientation in tow rather than one direction only, resulting…
Bio-based barrier materials

Kleppinger, Ralf; Martens, Hans; Tandler, Renate; Soliman, Maria

Customer publications

Bio-based barrier materials

Kleppinger, Ralf; Martens, Hans; Tandler, Renate; Soliman, Maria

Multilayered polyolefin-based film systems are being used in packaging industry to add various functionalities by tailoring layer sequences, thickness and type of the material used in the final application. A new concept based on carbohydrates had been investigated and confirmed that similar functionality may be obtained compared to EVOH which…