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000278935 1001_ $$0P:(DE-HGF)0$$aMalo de Molina, Paula$$b0$$eCorresponding author
000278935 245__ $$aPhase Behavior of Nonionic Microemulsions with Multi-end-capped Polymers and Its Relation to the Mesoscopic Structure
000278935 260__ $$aWashington, DC$$bACS Publ.$$c2015
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000278935 520__ $$aThe polymer architecture of telechelic or associative polymers has a large impact on the bridging of self-assembled structures. This work presents the phase behavior, small angle neutron scattering (SANS), dynamic light scattering (DLS), and fluorescence correlation spectroscopy (FCS) of a nonionic oil-in-water (O/W) microemulsion with hydrophobically end-capped multiarm polymers with functionalities f = 2, 3, and 4. For high polymer concentrations and large average interdroplet distance relative to the end-to-end distance of the polymer, d/Ree, the system phase separates into a dense, highly connected droplet network phase, in equilibrium with a dilute phase. The extent of the two-phase region is larger for polymers with similar length but higher f. The interaction potential between the droplets in the presence of polymer has both a repulsive and an attractive contribution as a result of the counterbalancing effects of the exclusion by polymer chains and bridging between droplets. This study experimentally demonstrates that higher polymer functionalities induce a stronger attractive force between droplets, which is responsible for a more extended phase separation region, and correlate with lower collective droplet diffusivities and higher amplitude of the second relaxation time in DLS. The viscosity and the droplet self-diffusion obtained from FCS, however, are dominated by the end-capped chain concentration.
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000278935 65017 $$0V:(DE-MLZ)GC-1602-2016$$2V:(DE-HGF)$$aPolymers, Soft Nano Particles and  Proteins$$x1
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000278935 7001_ $$0P:(DE-HGF)0$$aIhlefeldt, Franziska Stefanie$$b1
000278935 7001_ $$0P:(DE-HGF)0$$aPrévost, Sylvain$$b2
000278935 7001_ $$0P:(DE-HGF)0$$aHerfurth, Christoph$$b3
000278935 7001_ $$0P:(DE-Juel1)130507$$aAppavou, Marie-Sousai$$b4$$ufzj
000278935 7001_ $$0P:(DE-HGF)0$$aLaschewsky, André$$b5
000278935 7001_ $$0P:(DE-HGF)0$$aGradzielski, Michael$$b6$$eCorresponding author
000278935 773__ $$0PERI:(DE-600)2005937-1$$a10.1021/acs.langmuir.5b00817$$gVol. 31, no. 18, p. 5198 - 5209$$n18$$p5198 - 5209$$tLangmuir$$v31$$x1520-5827$$y2015
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