Glassy behavior

G. B. McKenna. Glass formation and glassy behavior. In C. Booth, ed. Comprehensive Polymer Science. New York Pergamon, 2 311-362, 1989. 

Pergamon, Oxford, 1989, pp. 311-362. Glass Formation and Glassy Behavior. 

McKenna, G. B. (1989). Glass formation and glassy behavior. In Comprehensive Polymer Science The Synthesis, Characterization, Reactions, Applications of Polymers, Vol. II Polymer Properties, G, Allen, and Bevington, J. C., eds., Pergamon Press, New York, pp. 311-362. 

Miyzaki, Y., Matsua, T., and Suga, H. (2000) Low-temperature heat capacity and glassy behavior of lysozyme crystal J. Phys. Chem. B 104, 8044-8052. 

C. Godreche and J. M. Luck, Long-time regime and scaling of correlations in a simple model with glassy behavior. J. Phys. A Math. Gen. 29, 1915 (1995). 

Fig. 14. Stoichiometric DGEBA/DDS network fracture energy versus reduced test temperature, T, — T. Both rubbery and glassy fracture behavior are illustrated. Individual data points for glassy behavior are not plotted because of overlap. Rubbery fracture energies are from Fig 6, and glassy fracture energies are from Fig. 12 via Eq. (13) Epon 828/DDS O Epon lOOlF/DDS Epon 1(X)2F/DDS A Epon 1004F/DDS O Epon 1007F/DDS. (After LeMay >)...

This is the situation in blends described in references 19 and 20, but not for the 1,2-PBD/PIP blends [2,5]. Such an effect would not be operative at frequencies and temperatures for which glassy behavior is approached. 

Under applied pressure a glassy behavior of the anion order is sometimes observed and often superconductivity is stabihzed. 

Figure 2.1 The hard-sphere phase diagram. Below volume fraction < (f>] = 0.494, the suspension is a disordered fluid. Between <) >i = 0.494 and 02 = 0.545, there is coexistence of this disordered phase with a colloidal crystalline phase with FCC (or HCP) order the colloidal crystalline phase is the equilibrium one up to the maximum close-packing limit of 0cp = 0.74. Nonequilibrium colloidal glassy behavior can also occur between

Yet no completely satisfactory microscopic theory of glassy behavior exists. At least for... 

Very recently, much progress has been made using powerful computer simulations, which can realistically model glass formation in simple liquids such as argon, or can model less realistically the formation of glassy characteristics in more complex liquids such as polymers. No doubt these methods will continue to enhance our understanding of glassy behavior. ... 

After we finished the manuscript we learned of recent experiments by X. Shi et ai on sound attenuation (to be published) and by R. Yu et ai on thermal conductivity (private communication). Their results indicate that there is a frequency-dependent glassy behavior at low temperature, in agreement with our predictions. 

The stability of glass-forming systems is also a matter of considerable importance. Early studies have explored the association between the glassy behavior and the chemical stability (80), whereas a number of investigations have examined the recrystallization behavior of glassy drugs and excipients. In essence, the increased molecular mobility above the glass transition temperature renders recrystallization... 

The calculated small-strain mechanical properties are shown in Figure 18.14 (Poisson s ratio and bulk modulus) and Figure 18.15 (Young s modulus and shear modulus). These properties all manifest the effect of the change from rubbery to glassy behavior with increasing wsty. 

The x (T) and x "(7) of solvated [FeCp 2][TCNE]-MeCN, however, differs significantly from that observed for [FeCp 2][TCNE] (Figure 9). The 7 is substantially reduced by 40% to 2.87 K, and (j> increase over 30-fold indicating extensive disorder and a glassy behavior. Similar results are observed for solvated [FeCp 2][TCNE]-S (S = EtCN, PrCN, PhCN, 1,2-C6H4C12, NCC4HgCN). 2... 

Plazek, 1995) become the local segmental dynamics at the highest frequencies prior to the onset of glassy behavior. 

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