caa a22 4500 463223535 CHVBK 20180405153219.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10853-007-1744-1 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1744-1 Viscoelasticity studies for a fibrous collagen material: chrome-free leather [Elektronische Daten] [Cheng-Kung Liu, Nicholas Latona, Gary DiMaio, Peter Cooke] Chrome-free leather such as glutaraldehyde-tanned leather behaves very differently from chrome-tanned leather. Information regarding its viscoelasticity has not been previously reported. Hysteresis and stress relaxation are two essential properties associated with viscoelasticity. We have designed a cyclic tensile test to measure these properties to gain insight into the structural difference between chrome-free and chrome-tanned leather. Observations revealed that chrome-free leather tanned with glutaraldehyde has a higher hysteresis than chrome-tanned leather. Stress relaxation experiments, on the other hand showed chrome-free leather has very similar relaxation curves as chrome-tanned leather. Both leathers demonstrate a rapid decrease in stress for the first few seconds followed by a much slower decay thereafter. The chrome-free leather, however, has a greater initial stress than chrome-tanned leather, indicating a higher stiffness than chrome-tanned leather. Moreover, observations showed the viscoelasticity of leather was affected significantly by its fatliquor content. A decrease of loading energy in a cyclic stress-strain experiment resulted from higher fatliquor content in leather. Springer Science+Business Media, LLC, 2007 Liu Cheng-Kung Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut Latona Nicholas Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut DiMaio Gary Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut Cooke Peter Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8509-8516 0022-2461 42:20<8509 2007 42 10853 https://doi.org/10.1007/s10853-007-1744-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1744-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Cheng-Kung Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut NATIONALLICENCE 700 1- Latona Nicholas Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut NATIONALLICENCE 700 1- DiMaio Gary Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut NATIONALLICENCE 700 1- Cooke Peter Agricultural Research Service, Eastern Regional Research Center, United States Department of Agriculture, 600 East Mermaid Lane, 19038-8598, Wyndmoor, PA, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/20(2007-10-01), 8509-8516 0022-2461 42:20<8509 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer