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Glass transition and fragility in the simple molecular glassformer CS2 from CS2-S2Cl2 solution studies.
 

Summary: 1
Glass transition and fragility in the simple molecular glassformer CS2 from CS2-
S2Cl2 solution studies.
Zuofeng Zhao, Wei Huang,1
Ranko Richert and C. Austen Angell
Dept. of Chemistry and Biochemistry,
Arizona State University,
Tempe, AZ 85287-1604
footnote: 1
) Present address: Dept. of Chemistry, University of Washington, Seattle, Washington 98195.
Abstract.
With an interest in finding the fragility for a simple, single component, molecular
glassformer, we have determined the dielectric relaxation and glass transition behavior for
a series of glasses in the CS2-S2Cl2 and CS2-toluene systems. Crystallization of CS2 can be
completely avoided down to the composition 20 mol% second component, and the fragility
proves almost independent of CS2 content in each system. Since the glass temperature Tg
obtained from both thermal studies and from dielectric relaxation (using Tg,diel=T = 100s) is
quite linear over the whole composition range in each system, and since relaxation time data
for pure CS2 fall on the same master plot when scaled by the linearly extrapolated Tg value,
we deduce that pure CS2 has the same high fragility as the binary solutions. The value is

  

Source: Angell, C. Austen - Department of Chemistry and Biochemistry, Arizona State University

 

Collections: Materials Science; Chemistry