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SUMMARY:Co(non)solvency or the puzzle of polymer properties in mixed good 
 or poor solvents - Prof. Dr. Kurt Kremer\, Max-Planck-Institut für Polyme
 rforschung\, Mainz
DTSTART:20170130T143000Z
DTEND:20170130T153000Z
UID:TALK70343@talks.cam.ac.uk
CONTACT:Prof. Gabor Csanyi
DESCRIPTION:The relation between atomistic structure\, architecture\, mole
 cular weight and material properties is of basic concern of modern soft ma
 tter science. Here computer simulations on different levels of resolution 
 play an increasingly important role. To progress further adaptive schemes 
 are being developed\, which allow for a free exchange of particles (atoms\
 , molecules) between the different levels of resolution. Typical examples 
 include the solvation of polymers in mixed solvents\, especially PNIPAM an
 d PMMA in water alcohol mixtures. The first reveals an interesting coil-gl
 obule-coil transition. This conformational transition cannot be explained 
 within the classical Flory-Huggins picture\, which is the standard mean fi
 eld theory for polymer solutions and mixtures. The results point towards a
  general design of 'smart stimuli responsive polymers'. The second display
 s a weak swelling in a mixture of two poor solvents.\n\nThis work has been
  performed in collaboration with D. Mukherji and C. Marques.\n\n# D. Mukhe
 rji and K. Kremer Macrom. 46\, 9158 (2013)\n# D. Mukherji\, C. M. Marques\
 , K. Kremer\, Nat. Comm. 5\, 4882 (2014)\n# D. Mukherji\, C. M. Marques\, 
 T. Stuehn\, K. Kremer\, J. Chem. Phys. 142\, 114903 (2015)\n# D. Mukherji\
 , M. Wagner\, M. D. Watson\, S. Winzen\, T. E. de Oliveira\, C. M. Marques
 \, K. Kremer\, Soft Matter 12\, 7995—8003 (2016)
LOCATION:Dept. of Chemistry\, Wolfson Lecture Theatre
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