Impact of controlled particle size nanofillers on the mechanical properties of segmented polyurethane nanocomposites

Simple item page
dc.contributor.authorFinnigan, Ben_AU
dc.contributor.authorCasey, Pen_AU
dc.contributor.authorCookson, DJen_AU
dc.contributor.authorHalley, PJen_AU
dc.contributor.authorJack, KSen_AU
dc.contributor.authorTruss, RWen_AU
dc.contributor.authorMartin, DJen_AU
dc.date.accessioned2008-04-18T04:58:47Zen_AU
dc.date.accessioned2010-04-30T05:02:42Zen_AU
dc.date.available2008-04-18T04:58:47Zen_AU
dc.date.available2010-04-30T05:02:42Zen_AU
dc.date.issued2007-08-06en_AU
dc.date.statistics2007-08en_AU
dc.description.abstractThe impact of average layered silicate particle size on the mechanical properties of thermoplastic polyurethane (TPU) nanocomposites has been investigated. At fixed addition levels (3 wt% organosilicate), an increase in average particle size resulted in an increase in stiffness. Negligible stiffening was observed for the smallest particles (30 nm) due to reduced long-range intercalation and molecular confinement, as well as ineffective stress transfer from matrix to filler. At low strain (<= 100%), an increase in filler particle size was associated with an increase in the rate of stress relaxation, tensile hysteresis, and permanent set. At high strain (1200%), two coexisting relaxation processes were observed. The rate of the slower (long-term) relaxation process, which is believed to primarily involve the hard segment rich structures, decreased on addition of particles with an average diameter of 200 nm or less. At high strain the tensile hysteresis was less sensitive to particle size, however the addition of particles with an average size of 200 nm or more caused a significant increase in permanent set. This was attributed to slippage of temporary bonds at the polymer-filler interface, and to the formation of voids at the sites of unaligned tactoids. Relative to the host TPU, the addition of particles with an average size of 30 nm caused a reduction in permanent set. This is a significant result because the addition of fillers to elastomers has long been associated with an increase in hysteresis and permanent set. At high strain, well dispersed and aligned layered silicates with relatively small interparticle distances and favourable surface interactions are capable of imparting a resistance to molecular slippage throughout the TPU matrix. © 2007, Inderscience Enterprises Ltd.en_AU
dc.identifier.citationFinnigan, B., Casey, P., Cookson, D., Halley, P., Jack, K., Truss, R., & Martin, D. (2007). Impact of controlled particle size nanofillers on the mechanical properties of segmented polyurethane nanocomposites. International Journal of Nanotechnology, 4(5), 496-515. doi:10.1504/IJNT.2007.014747en_AU
dc.identifier.govdoc1169en_AU
dc.identifier.issn1475-7435en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleInternational Journal of Nanotechnologyen_AU
dc.identifier.pagination496-515en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1077en_AU
dc.identifier.urihttps://doi.org/10.1504/IJNT.2007.014747en_AU
dc.identifier.volume4en_AU
dc.language.isoenen_AU
dc.publisherInderscienceen_AU
dc.subjectParticle sizeen_AU
dc.subjectNanostructuresen_AU
dc.subjectPolyurethanesen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectFillersen_AU
dc.subjectSilicatesen_AU
dc.titleImpact of controlled particle size nanofillers on the mechanical properties of segmented polyurethane nanocompositesen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.8 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles