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OnderzoekZernike (ZIAM)MCNPMLoos Group

Martin Faber

Martin
Martin
Email M.G.Faber at rug.nl
Phone +31 503634437
Room number

5118.0362a  

Self-assembly of multiblock copolymers with two length scales

The morphology of self-assembled structures of AB diblock copolymers are well studied. Structures like cylinders, lamellae or more complex gyroid structures will be formed depending on the A/B volume fraction ratios. In addition to these diblocks more complex systems such as ABA triblock copolymers, ABC triblock copolymers and (AB)n multiblock copolymers have been studied extensively as well.

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The focus in our research is on A-(BA)n-B multiblock copolymers composed of multiple short middle diblock units (n) and two long end blocks. Multiblock copolymers of polystyrene and poly(tert-butoxy styrene) were synthesized through sequential anionic polymerization giving hexa, octa and even hexadeca multiblock copolymers with a low overall polydispersity. The self-assembly of these multiblock copolymers was investigated using Small Angle X-ray Scattering (SAXS) and Transmission Electron Microscopy (TEM). A unique two-length-scale lamellar morphology with multiple periodicities was observed for the octablock copolymer.
Laatst gewijzigd:01 juli 2015 10:53