caa a22 4500 475764633 CHVBK 20180406123601.0 cr unu---uuuuu 170329e20000801xx s 000 0 eng 10.1007/s003960000321 doi (NATIONALLICENCE)springer-10.1007/s003960000321 Stress-induced compaction of concentrated dispersions of gel particles [Elektronische Daten] [G. Cassin, I. Appelqvist, V. Normand, I. T. Norton]  When submitted to successive shear stress steps, the elastic shear modulus of a concentrated dispersion of soft gel particles shows an exponential increase from 50 to 110 Pa. A slow relaxation time (τ r ≃500 s) attributed to the mobility of the gel particles within their free volume is obtained. The amplitude of the relaxation time distribution decreases with the number of shear stress sequences, indicating a progressive decrease in the free volume available per particle. The results are explained by an increase in the packing density as grains rearrange under the external constraint. A rate constant is determined from the evolution of the dispersion's elastic modulus (K≃4 × 10−4 s−1). The rate of compaction shows a logarithmic decrease when the initial particle's packing fraction is increased. Springer-Verlag Berlin Heidelberg, 2000 Key words Granular material nationallicence Microgel nationallicence Packing fraction nationallicence Compactivity nationallicence Compaction nationallicence Cassin G. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut Appelqvist I. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut Normand V. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut Norton I. T. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut https://doi.org/10.1007/s003960000321 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960000321 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cassin G. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut NATIONALLICENCE 700 1- Appelqvist I. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut NATIONALLICENCE 700 1- Normand V. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut NATIONALLICENCE 700 1- Norton I. T. Unilever Research Colworth Colworth House Sharnbrook, Bedfordshire MK44 1LQ, UK, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer