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Research Zernike (ZIAM) Macromolecular Chemistry and New Polymeric Materials Loos Group

Martin Faber

Email M.G.Faber at
Phone +31 503634437
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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.

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