Structural and rheological aging in model attraction-driven glasses by Rheo-SANS
Downloadable Content
Abstract
- Aging in a model colloidal suspension comprised of particles with a thermoreversible attraction is studied using Rheo-SANS techniques in the attractive-driven glass state. Multiple thermal pathways lead to a common rheological and microstructural aging trajectory, as was observed previously for a thermoreversible gel. SANS measurements of the colloidal glass microstructure as a function of temperature and time during various quench protocols are quantitatively characterized in terms of an effective interaction strength that becomes an order parameter defining the microstructural state of the glass. Using previously validated concepts of a fictive temperature, a semi-empirical, quantitative relationship similar to an Avrami relationship is established between the mechanical aging (elastic modulus) and microstructural aging (order parameter) that is independent of thermal history for the thermal profiles studied herein at long times. Furthermore, shear rejuvenation is studied, and while shear may only partially reduce the degree of structure in the glass, aging upon flow cessation is found to follow a common trajectory when viewed in terms of the microstructural order parameter.
| Title | Structural and rheological aging in model attraction-driven glasses by Rheo-SANS |
|---|---|
| Creator | Gordon, Melissa B. |
| Wagner, N. J. | |
| Kloxin, C. J. | |
| Publisher | Soft Matter |
| Academic Department | Chemistry |
| Division | Natural Sciences |
| Organization | Lafayette College |
| Date Issued | January 28, 2021 |
| Date Available | 2022-01-28 |
| Type | Article |
| Language | English |
| Keyword | adhesive hard spheres |
| thermoreversible interactions | |
| aging | |
| colloidal glasses | |
| glass microstructure | |
| Bibliographic Citation | Gordon, M. B., C. J. Kloxin, and N. J. Wagner (2021 Jan 28) "Structural and rheological aging in model attraction-driven glasses by Rheo-SANS." Soft Matter 17 (4): 924-935. |
| Standard Identifier | Handle 10385/7d278v47p |
| DOI 10.1039/d0sm01373k | |
| Permalink | http://hdl.handle.net/10385/7d278v47p |
| Rights Statement |
In Copyright
|
| Rights Holders | Royal Society of Chemistry |
Contains
| File | GordonM-SoftMatter-vol17-2021.pdf | Uploaded 2022-01-06 | Public | Download |
Member of Collection
