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The University of Southampton

Catalytic Activation of Renewable Resources for Polymer Synthesis Seminar

5 February 2014
Building 27, Room 2001 Chemistry Highfield Southampton SO17 1BJ

For more information regarding this seminar, please email Dr Geoff Hyett at .

Event details

Prof Charlotte Wiliams presents a seminar as part of the MAFS Seminar Series

The synthesis of various metal catalysts for the ring-opening polymerization of lactide and the ring-opening copolymerization of carbon dioxide/epoxides will be described. In particular, emphasis will be placed on understanding the catalytic activity (kinetics), selectivities (stereocontrol as well as monomer selectivity) so as to propose various mechanisms by which these catalysts may be operating. Various techniques are used to probe the proposed pathways, including in situ spectroscopic characterization of intermediates, structure-activity relationships, DFT calculations and polymerization kinetics. A new chemoselective monomer control mechanism is presented which enables the preparation of copolymers from mixed monomer feedstocks.
The second part of the talk, the preparation of new colloidal nanocatalysts based on ZnO and Cu nanoparticles suspended in organic solvents will be described. The syntheses apply organometallic precursors to prepare, with high reproducibility, nanoparticles of the metal/metal oxide with good control of the surface functionality. These nanoparticles are applied, in a continuously stirred tank reactor, as catalysts for the hydrogenation of carbon dioxide to produce methanol.

Speaker information

Prof Charlotte Williams, Imperial College. Prof Williams research interests include: Polymerisation catalysis; Organometallic chemistry; Zn(II), Y(III) and Al(III) chemistry; Polymer synthesis; Biodegradable and biocompatible polymers; Electroactive polymers; Polymeric nanomaterials and Sustainable chemistry

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