Signatures of Structural Recovery in Colloidal Glasses

Di, Xiaojun; Win, Kyaw Zin; McKenna, Gregory B.; Narita, Tetsuharu; Lequeux, François; Pullela, Srinivasa R.; Cheng, Zhengdong

doi:10.1103/physrevlett.106.095701

Cited by 60 publications

(60 citation statements)

References 22 publications

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“…[88] Because the shapes of colloids have large impact on their dynamics, they have been usually studied with the ageing of polymer colloids. [89,90] However, the dynamics of polymeric colloids are of short-time dynamic signature,[91] so we do not comment further herein.…”

Section: Diluted and Blended Systemsmentioning

confidence: 99%

A review of the slow relaxation processes in the glass–rubber transition region of amorphous polymers

Zhang

Huang

2015

Phase Transitions

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This article is a review that introduces several articles about slow relaxation processes, also known as slower segmental dynamics. According to the literature, the coupling effect and free volume holes are two important elements for slower micro-dynamics. In addition, the slower processes of many-body systems (blend and diluted systems) are summarised. A good numerical method for detecting multiple modes in the glassÀrubber transition region is introduced.

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Section: Diluted and Blended Systemsmentioning

confidence: 99%

A review of the slow relaxation processes in the glass–rubber transition region of amorphous polymers

Zhang

Huang

2015

Phase Transitions

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“…5 Owing to vast academic interest and industrial applications this class of materials has attracted significant attention of the scientific community over the past decade. [6][7][8][9] However inapplicability of fundamental laws of viscoelasticity along with yielding behavior and thixotropy limit the analyzability and optimal applicability of these materials. Recently Joshi and coworkers [10][11][12] showed that fundamental laws of linear viscoelasticity such as …”

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confidence: 99%

Linear viscoelasticity of soft glassy materials

Kaushal

Joshi

2014

Soft Matter

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Owing to lack of time translational invariance, aging soft glassy materials do not obey fundamental principles of linear viscoelasticity. We show that by transforming the linear viscoelastic framework from the real time domain to the effective time domain, wherein the material clock is readjusted to account for evolution of relaxation time, the soft glassy materials obey effective time translational invariance. Consequently, we demonstrate successful validation of principles of linear viscoelasticity (Boltzmann superposition principle and convolution relation for creep compliance and stress relaxation modulus) for different types of soft glassy materials in the effective time domain.

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“…Dispersions of interest that have been investigated include "hard-sphere interaction" and "soft and steric" interaction dispersions [7][8][9][10][11][12][13][14]. In prior work, we have addressed the range of validity of the colloidal glass to the molecular glass by using diffusing wave light-scattering spectroscopy (DWS) to examine the "Kovacs signatures" of thermosensitive particle dispersions subjected to concentration-jump conditions that mimic the temperature-jump histories designed by Kovacs [15,16]. Building on these works, we here investigate the dynamics of a similar thermosensitive particle dispersion, but using direct rheological measurement and by performing the first comparisons of the aging response of a colloidal glass after both concentration-jump and shear-melting types of perturbations or histories.…”

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confidence: 99%

Comparison of the physical aging behavior of a colloidal glass after shear melting and concentration jumps

Peng

McKenna

2014

Phys. Rev. E

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Colloidal systems are considered good models of molecular glasses and we further explore the range of validity of this paradigm using a thermosensitive core-shell particle dispersion to study the aging response of a colloidal glass subsequent to both shear-melting and temperature (concentration)-jump perturbations in the vicinity of the glass transition concentration or temperature. Sequential creep experiments were used to probe the different aging responses of the system. The colloidal glass displays aging behavior after both types of perturbation and our results indicate that this colloidal glass is similar to a molecular glass, in that shift rates are found to be below unity and to decrease towards zero as the glass temperature (or concentration) is approached as temperature increases. However, the kinetics of the aging in the two cases are different indicating that the structural changes induced by the mechanical perturbation are different from those induced by the temperature or concentration jump-similar to findings on mechanical rejuvenation of molecular glasses. We also find differences between the colloidal glass and molecular glasses: In the case of the colloidal glass the structural recovery or equilibration times do not diverge, while the mechanical relaxation times do. On the other hand, for the molecular glass, both times change very rapidly with decreasing temperature, apparently towards a distant point of divergence.

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Signatures of Structural Recovery in Colloidal Glasses

Cited by 60 publications

References 22 publications

A review of the slow relaxation processes in the glass–rubber transition region of amorphous polymers

A review of the slow relaxation processes in the glass–rubber transition region of amorphous polymers

Linear viscoelasticity of soft glassy materials

Comparison of the physical aging behavior of a colloidal glass after shear melting and concentration jumps

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