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| Description: | Monday, December 14, 2015 Speaker: Dimitris Vlassopoulos Affiliation: Department of Materials Science and Technology,University of Crete Title: Molecular manipulation of the flow properties of soft matter Location: Computer Science Department, room A115-A117 (ground floor), Voutes Time: 16:00 Language: English Abstract Topological constraints, density heterogeneities and mixing play a crucial role in the dynamics of soft materials. An important consequence the ability to tailor the flow properties of different systems at molecular level, by accounting for microstructural characteristics and thermodynamics. To illustrate this point, we present 2 examples: (i) High-molar mass star polymers with changing functionality can respond as regular entangled stars or prototype soft colloids either in solution or in melt. In solution, they exhibit intriguing properties and their (ultra)softness is responsible for a variety of new metastable states and transitions at high fractions in molecular or polymeric solvents. We discuss here the rich state diagram of large stars and small hard spheres. (ii) Adding small fraction of ring polymers with low viscosity to linear polymers with higher viscosity results in a mixture with enhanced viscosity compared to both components. These examples demonstrate that polymer chemistry and thermodynamics hold the premise for exploring and understanding novel properties of soft matter. |
| Location: | Computer Science Department, room A115-A117 (ground floor), Voutes |
| Status: | Waiting for approval |
| Date: | Monday, December 14, 2015 |
| Time: | 16:00 EET |
| Priority: | 5-Medium |
| Access: | Public |
| Created by: | Lila Kalogeraki |
| Updated: | Wednesday, December 9, 2015 09:38 GMT |