er losophy ojects, complimentarity, mobility and international collaborations group meetings, funding re with expertise (basis for further development) senior) dis poulos ple: , technician Researcher A et, Researcher B unding: EU (ITN, NoE, LSI), limited industrial tions: US, Canada, Japan, Korea, France, UK, Germany, Belgium
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Soft Matter Group philosophy Define projects, complimentarity, mobility and international collaborations, visitors, group meetings, funding Infrastructure.
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Soft Matter
Group philosophyDefine projects, complimentarity, mobility and international collaborations,visitors, group meetings, fundingInfrastructure with expertise (basis for further development)
Members (senior)G. FytasG. Petekidis D. Vlassopoulos
FORTH people:A. Larsen, technicianU. Jonas, Researcher AB. Loppinet, Researcher B
Current funding: EU (ITN, NoE, LSI), limited industrial
Collaborations: US, Canada, Japan, Korea, France, UK, Germany, Belgium
Tailoring the flow of soft matter molecular design: synergy of chemistry, modeling, physical
expt
HardSoft
Com
ple
xit
y -
tu
nab
ility
ThermodynamicsDynamic arrest
Structure / dynamicsRheology
D. Vlassopoulos UoC-MST & FORTH-IESL
Viscoelasticity of entangled polymers
polymers with free ends
State-of-the-art: from Edwards over deGennes to Doi and McLeish
Tube modelPlateau modulus G=ρRT/Me
Linear: reptation etcStar: arm retraction
Viscoelasticity of entangled polymers
polymers with free ends
State-of-the-art: from Edwards over deGennes to Doi and McLeish
Q: polymers without free ends ?
Tube modelPlateau modulus G=ρRT/Me
Linear: reptation etcStar: arm retraction
Ring polymers
Roovers, NRC, 1985
Pure linear melt and melt of ring PS (no plateau)
τe
0.43
Power-law stress relaxation of entangled rings
Kapnistos et al, Nat. Mat. 2008
M. Rubinstein, UNC, 2003
Key: Critical fractionation toobtain pure rings(T. Chang, Pohang Univ., 2000)