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SUMMARY:Contr. Talk 8 - Shear Effects on Soft Colloids
DTSTART;VALUE=DATE-TIME:20181211T103000Z
DTEND;VALUE=DATE-TIME:20181211T105000Z
DTSTAMP;VALUE=DATE-TIME:20260523T152608Z
UID:indico-contribution-488@lindico453.srv.lu.se
DESCRIPTION:Speakers: Jorg Stellbrink (JCNS-1\, Forschungszentrum Julich\,
  52425 Julich\, Germany)\nWhereas the collective response to external shea
 r of soft colloids is frequently investigated [1\,2]\, observations of she
 ar-induced effects on the single particle level are still scarce. Therefor
 e we investigated this intraparticle “brush deformation” of polybutadi
 ene (PB) star and linear polymers by rheology and Rheo-SANS [3\, 4]. Excel
 lent agreement between experiment and theory with respect to the amount of
  shear deformation and shear thinning for star polymers with varying funct
 ionality\, f\, was found. Surprisingly\, two decay modes (“fast” and 
 “slow” modes) were observed in flow curves of star polymers\, indicati
 ng a hierarchical deformation of the polymeric corona. In binary mixtures 
 it was observed that fast and slow modes originating from the star polymer
 s were strongly affected by the addition of linear homopolymer\, which inf
 luenced the shear induced ‘brush deformation’ of star polymers. We fou
 nd macroscopic phase separation upon increasing concentrations of linear p
 olymer and shear-induced microphase separation (coil-to-globule transition
 ) by means of Rheo-SANS experiments.\n\nhttps://lindico453.srv.lu.se/event
 /67/contributions/488/
LOCATION:Elite Hotel Ideon Tera
URL:https://lindico453.srv.lu.se/event/67/contributions/488/
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