Low-frequency elastic behavior of a supercooled liquid

Chushkin, Yuriy; Caronna, Chiara; Madsen, Anders

doi:10.1209/0295-5075/83/36001

Cited by 34 publications

(42 citation statements)

References 30 publications

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“…Apart from mechanical measurements, low frequency elasticity has been also evidenced using very different techniques as X-ray photon correlation [20]. These developments carried out on supercooled polypropyleneglycol suggest that the supercooled state of glass formers is made of solid clusters present as infinite or extremely long-range density fluctuations characterized by slow relaxation times which make them appear as elastic clusters on the experimental time scales, confirming the very early observations of dynamic clusters by Fischer using dynamic light scattering [21].…”

Section: Discussionmentioning

confidence: 62%

Revealing the solid-like nature of glycerol at ambient temperature

Noirez

Baroni

2010

Journal of Molecular Structure

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Section: Discussionmentioning

confidence: 62%

Revealing the solid-like nature of glycerol at ambient temperature

Noirez

Baroni

2010

Journal of Molecular Structure

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“…In 2007, S-Q Wang [55] reproduced the results of [15] using the same protocol. Other techniques, such as X-ray photon correlation spectroscopy [56], evidence relaxation modes in glass formers much slower than those conventionally described. These converging results indicate that an elastic state has so far been missed in the description of the liquid state.…”

Section: Discussionmentioning

confidence: 98%

Richness of Side-Chain Liquid-Crystal Polymers: From Isotropic Phase towards the Identification of Neglected Solid-Like Properties in Liquids

et al. 2012

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Very few studies concern the isotropic phase of Side-Chain Liquid-Crystalline Polymers (SCLCPs). However, the interest for the isotropic phase appears particularly obvious in flow experiments. Unforeseen shear-induced nematic phases are revealed away from the N-I transition temperature. The non-equilibrium nematic phase in the isotropic phase of SCLCP melts challenges the conventional timescales described in theoretical approaches and reveal very long timescales, neglected until now. This spectacular behavior is the starter of the present survey that reveals long range solid-like interactions up to the sub-millimetre scale. We address the question of the origin of this solid-like property by probing more particularly the non-equilibrium behavior of a polyacrylate substituted by a nitrobiphenyl group (PANO2). The comparison with a polybutylacrylate chain of the same degree of polymerization evidences that the solid-like response is exacerbated in SCLCPs. We conclude that the liquid crystal moieties interplay as efficient elastic connectors. Finally, we show that the "solid" character can be evidenced away from the glass transition temperature in glass formers and for the first time, in purely alkane chains above their crystallization temperature. We thus have probed collective elastic effects contained not OPEN ACCESSPolymers 2012, 4 1110 only in the isotropic phase of SCLCPs, but also more generically in the liquid state of ordinary melts and of ordinary liquids.

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“…The present results on the n-heptadecane exclude effects of glass transition clustering [9] of confinement-induced solidification or ill-defined supercooled states. X-ray photon correlation spectroscopy shows that the analysis of capillary waves of supercooled PPG requires an elastic term in addition to the viscous contribution [29]. Recent dielectric developments might indicate a slow relaxation mode so far unidentified [30].…”

Section: Discussionmentioning

confidence: 99%