2013
DOI: 10.1063/1.4789946
|View full text |Cite
|
Sign up to set email alerts
|

Mechanical spectra of glass-forming liquids. I. Low-frequency bulk and shear moduli of DC704 and 5-PPE measured by piezoceramic transducers

Abstract: We present dynamic shear and bulk modulus measurements of supercooled tetraphenyl-tetramethyl-trisiloxane (DC704) and 5-phenyl-4-ether over a range of temperatures close to their glass transition. The data are analyzed and compared in terms of time-temperature superposition (TTS), the relaxation time, and the spectral shape parameters. We conclude that TTS is obeyed to a good approximation for both the bulk and shear moduli. The loss-peak shapes are nearly identical, while the shear modulus relaxes faster than… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

6
59
0

Year Published

2015
2015
2020
2020

Publication Types

Select...
6
1

Relationship

3
4

Authors

Journals

citations
Cited by 44 publications
(65 citation statements)
references
References 30 publications
6
59
0
Order By: Relevance
“…The shoving model, which links a supercooled liquid's fragility to the temperature variation of G ∞ , fits data well for many glass-forming liquids [5,28,82,83]. The shoving model relates directly to Eq.…”
Section: Discussionmentioning
confidence: 78%
See 2 more Smart Citations
“…The shoving model, which links a supercooled liquid's fragility to the temperature variation of G ∞ , fits data well for many glass-forming liquids [5,28,82,83]. The shoving model relates directly to Eq.…”
Section: Discussionmentioning
confidence: 78%
“…Nevertheless, one CCRE will be regarded as part of the alpha process for the following reasons. Previous publications of the Glass and Time group have presented experimental [28,54,55] and theoretical [56][57][58] evidence that in the absence of beta relaxation the alpha process has a generic ω −1/2 high-frequency decay of the dielectric loss and shear compliance. This is an old idea that keeps resurfacing, recently in an interesting biophysical context [59], and a generic ω −1/2 high-frequency decay is the characteristic feature of the 1967 Barlow-Erginsav-Lamb (BEL) model [1, 53,56,60,61].…”
Section: E Model For the Dynamic Shear-mechanical Propertiesmentioning
confidence: 99%
See 1 more Smart Citation
“…Strictly speaking, χ(ω) is related to the density autocorrelation function and therefore to the bulk compliance, not the longitudinal compliance. However, the difference between K(ω) and M(ω) (and thus also the bulk and longitudinal compliances) is very small because the shear modulus is considerably smaller than the longitudinal modulus, and their frequency-dependent dynamics are similar at both low (33,55,56) and high (47) frequencies.…”
Section: [5]mentioning
confidence: 99%
“…6; detailed descriptions of the techniques and data collected from them are discussed in SI Appendix. The techniques include three low-frequency methods involving piezoceramics that shear or compress the entire sample quasi-statically (33)(34)(35)48) and four higher-frequency methods using short laser pulses to excite and subsequently detect acoustic waves in an irradiated region (30-32, 49-52).…”
Section: Methodsmentioning
confidence: 99%