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Université de Fribourg

One-step ring opening metathesis block-like copolymers and their compositional analysis by a novel retardation technique

Yasir, Mohammad ; Liu, Peng ; Markwart, Jens C. ; Suraeva, Oksana ; Wurm, Frederik R. ; Smart, Jansie ; Lattuada, Marco ; Kilbinger, Andreas F. M.

In: Angewandte Chemie International Edition, 2020, vol. 59, no. 32, p. 13597-13601

Using a one-step synthetic route for block copolymers avoids the repeated addition of monomers to the polymerization mixture, which can easily lead to contamination and, therefore, to the unwanted termination of chain growth. For this purpose, monomers (M1–M5) with different steric hindrances and different propagation rates are explored. Copolymerization of M1 (propagating rapidly) with M2...

Université de Fribourg

Polyaspartamide functionalized catechol-based hydrogels embedded with silver nanoparticles for antimicrobial properties

Tan, Milène ; Choi, Youngjin ; Kim, Jaeyun ; Kim, Ji-Heung ; Fromm, Katharina M.

In: Polymers, 2018, vol. 10, no. 11, p. 1188

In this study, polyaspartamide-based hydrogels were synthesized by boron-catechol coordination followed by incorporation of AgNPs into the materials. Free catechol moieties were exploited to produce AgNPs. TEM analyses displayed AgNPs of less than 20 nm in diameter and with minimum aggregation, attesting the role of hydrogels to act as an efficient template for the production of dispersed...

Consortium of Swiss Academic Libraries

Novel injectable urethral bulking agents for the treatment of urinary incontinence

Jordan, O. ; Doelker, E. ; Defabiani, N. ; Caviezel, A. ; Iselin, C.

In: Journal of Materials Science: Materials in Medicine, 2004, vol. 15, no. 4, p. 519-522

Consortium of Swiss Academic Libraries

What is behind the plastic strain rate?

Hütter, Markus ; Grmela, Miroslav ; Öttinger, Hans

In: Rheologica Acta, 2009, vol. 48, no. 7, p. 769-778

Consortium of Swiss Academic Libraries

Stem cell plasticity, osteogenic differentiation and the third dimension

Rottmar, Markus ; Håkanson, Maria ; Smith, Michael ; Maniura-Weber, Katharina

In: Journal of Materials Science: Materials in Medicine, 2010, vol. 21, no. 3, p. 999-1004

Université de Fribourg

Structural behavior of cylindrical polystyrene-block-poly(ethylene-butylene)-block-polystyrene (SEBS) triblock copolymer containing MWCNTs: on the influence of nanoparticle surface modification

Hasanabadi, Noushin ; Nazockdast, Hossein ; Gajewska, Bernadetta ; Balog, Sandor ; Gunkel, Ilja ; Bruns, Nico ; Lattuada, Marco

In: Macromolecular Chemistry and Physics, 2017/218/22/n/a-n/a

In this work, the influence of carbon nanotubes (CNTs) on the self-assembly of nanocomposite materials made of cylinder-forming polystyrene-block-poly(ethylene- butylene)-block-polystyrene (SEBS) is studied. CNTs are modified with polystyrene (PS) brushes by surface-initiated atom transfer radical polymerization to facilitate both their dispersion and the orientation of neighboring PS domains...

Université de Fribourg

Facile synthesis of a high molecular weight amphiphilic aramid–ROMP block copolymer

Badoux, Michael ; Drechsler, Susanne ; Pal, Subhajit ; Kilbinger, Andreas F. M.

In: Macromolecules, 2017, vol. 50, no. 23, p. 9307–9314

Herein we report the facile synthesis of an amphiphilic rod–coil block copolymer obtained by the coupling of an amine-terminated poly(dimethylpropylamine norbornene imide) (PDMAPNI) and a pentafluorophenol ester-terminated poly(dimethoxybenzyl p-aminobenzoate) (PAram). Postpolymerization amide N- deprotection of the block copolymer yielded a strongly aggregating water-soluble rod– coil...