Universal critical-like scaling of dynamic properties in symmetry-selected glass formers.
Evidence for a possible general validity of the critical-like behavior of dielectric relaxation time or viscosity tau,eta proportional to (T-T(C))(-phi) with phi-->9 and T(C)<T(g) on approaching glass temperature (T(g)) is shown. This universal behavior is found in various systems where the vitrification is dominated by a selected element of symmetry. The supporting evidence was obtained on the basis of the distortion-sensitive, derivative-based analysis of tau(T) data for a rodlike liquid crystalline compound (E7), orientationally disordered crystals (plastic crystals), a colloidal nanofluid system, polymer melt (polystyrene), oligomeric liquid (EPON 828), and low molecular weight glass formers (glycerol, threitol, sorbitol, and 1-propanol). Results presented explain the puzzling experimental artifacts supporting the dynamical scaling model [R. H. Colby, Phys. Rev. E 61, 1783 (2000); B. M. Erwin, R. H. Colby, J. Non-Cryst. Solids 307-310, 225 (2002)]. It is suggested that spin-glass-like systems may be linked to the discussed pattern.
Drozd-Rzoska
Aleksandra
A
Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland. rzoska@us.edu.pl
Rzoska
Sylwester J
SJ
Paluch
Marian
M
D005898:Glass / Q000737:chemistry*; D050866:Liquid Crystals / Q000737:chemistry; D008970:Molecular Weight; D049329:Nanostructures / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D013696:Temperature
D011108:Polymers