TY  - JOUR
A1  - Raupp, Sebastian M.
A1  - Schmitt, Marcel
A1  - Walz, Anna-Lena
A1  - Diehm, Ralf
A1  - Hummel, Helga
A1  - Scharfer, Philip
A1  - Schabel, Wilhelm
T1  - Slot die stripe coating of low viscous fluids
JF  - Journal of Coatings Technology and Research
N2  - Slot die coating is applied to deposit thin and homogenous films in roll-to-roll and sheet-to-sheet applications. The critical step in operation is to choose suitable process parameters within the process window. In this work, we investigate an upper limit for stripe coatings. This maximum film thickness is characterized by stripe merging which needs to be avoided in a stable process. It is shown that the upper limit reduces the process window for stripe coatings to a major extent. As a result, stripe coatings at large coating gaps and low viscosities are only possible for relatively thick films. Explaining the upper limit, a theory of balancing the side pressure in the gap region in the cross-web direction has been developed.
Y1  - 2018
U6  - http://dx.doi.org/10.1007/s11998-017-0039-y
SN  - 1935-3804
VL  - 15
IS  - 5
SP  - 899
EP  - 911
PB  - Springer
ER  - 
TY  - PAT
A1  - Friederici, Nadja-Annette
A1  - Hojdis, Nils
T1  - Fahrzeugreifen
N2  - Die Erfindung betrifft einen Fahrzeugreifen mit zumindest einem radial außen befindlichen Gummilaufstreifen, Wulstbereichen für den Anschluss an eine Felge und mit auf einer Gummimischung basierenden Seitenwandbereichen zwischen Gummilaufstreifen und den Wulstbereichen. Ferner betrifft die Erfindung Verfahren zur Herstellung solcher Fahrzeugreifen. Um den Anteil der umweltschädlichen Substanzen, insbesondere im Innenstadtbereich, zu reduzieren weisen die Seitenwandbereiche auf der äußeren Oberfläche eine für den oxidativen Abbau von Molekülen photokatalytisch aktive Substanz auf.
Y1  - 2018
N1  - Patent DE102016219338A1 04.12.2018
ER  - 
TY  - JOUR
A1  - Svaneborg, Carsten
A1  - Karimi-Varzaneh, Hossein Ali
A1  - Hojdis, Nils
A1  - Fleck, Franz
A1  - Everaers, Ralf
T1  - Kremer-Grest Models for Universal Properties of Specific Common Polymer Species
JF  - Soft Condensed Matter
N2  - The Kremer-Grest (KG) bead-spring model is a near standard in Molecular Dynamic simulations of generic polymer properties. It owes its popularity to its computational efficiency, rather than its ability to represent specific polymer species and conditions. Here we investigate how to adapt the model to match the universal properties of a wide range of chemical polymers species. For this purpose we vary a single parameter originally introduced by Faller and Müller-Plathe, the chain stiffness. Examples include polystyrene, polyethylene, polypropylene, cis-polyisoprene, polydimethylsiloxane, polyethyleneoxide and styrene-butadiene rubber. We do this by matching the number of Kuhn segments per chain and the number of Kuhn segments per cubic Kuhn volume for the polymer species and for the Kremer-Grest model. We also derive mapping relations for converting KG model units back to physical units, in particular we obtain the entanglement time for the KG model as function of stiffness allowing for a time mapping. To test these relations, we generate large equilibrated well entangled polymer melts, and measure the entanglement moduli using a static primitive-path analysis of the entangled melt structure as well as by simulations of step-strain deformation of the model melts. The obtained moduli for our model polymer melts are in good agreement with the experimentally expected moduli.
Y1  - 2018
IS  - 1606.05008
ER  -