Polystyrene comb architectures as model systems for the optimized solution electrospinning of branched polymers
Artikel i vetenskaplig tidskrift, 2016

The bead to bead-free fibers transition for electrospun filaments was investigated for well-defined linear and comb homopolymers. A series of monodisperse model comb structures with well-defined backbone and side chains was synthesized using anionic polymerization of polystyrene (PS). All model combs had the same backbone and a similar total molecular weight. The length and number of branches was varied, but the total number of monomers in the side chains was nearly constant. Solutions of these polystyrenes in N,N-dimethylformamide (DMF) were electrospun under identical conditions to determine the effect of molecular topology on the morphology of the fibers. The morphology and fiber diameter for all PS model polymers depended on the zero shear viscosity, η0. The comb solutions generally formed fibers at lower η0 and the fibers had larger diameters compared with linear polystyrene. The bead to fiber transition occurred at substantially lower polymer concentrations for combs with fewer, but longer branches.

Rheology

Combs

Electrospinning

Författare

Kamran Riazi

Karlsruhe Institute of Technology

Jennifer Kübel

Karlsruhe Institute of Technology

Mahdi Abbasi

Karlsruhe Institute of Technology

Krystyna Bachtin

Karlsruhe Institute of Technology

Helmholtz Institute Ulm

Sylvia Indris

Karlsruhe Institute of Technology

Helmholtz Institute Ulm

Helmut Ehrenberg

Helmholtz Institute Ulm

Karlsruhe Institute of Technology

Roland Kádár

Chalmers, Material- och tillverkningsteknik, Polymera material och kompositer

Manfred Wilhelm

Karlsruhe Institute of Technology

Polymer

0032-3861 (ISSN)

Vol. 104 240-250

Ämneskategorier

Polymerkemi

Bearbetnings-, yt- och fogningsteknik

Textil-, gummi- och polymermaterial

Styrkeområden

Materialvetenskap

DOI

10.1016/j.polymer.2016.05.032