Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/10935
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Javni, Ivan | en_US |
dc.contributor.author | Zhang W. | en_US |
dc.contributor.author | Karajkov V. | en_US |
dc.contributor.author | Petrovic Z. | en_US |
dc.contributor.author | Divjaković, Vladimir | en_US |
dc.date.accessioned | 2020-03-03T14:42:02Z | - |
dc.date.available | 2020-03-03T14:42:02Z | - |
dc.date.issued | 2002-01-01 | - |
dc.identifier.issn | 0021955X | en_US |
dc.identifier.uri | https://open.uns.ac.rs/handle/123456789/10935 | - |
dc.description.abstract | Two series of rigid and flexible polyurethane foams were prepared with two types of silica fillers. The density of the flexible foams was 60 kg/m3 and that of rigid 30 kg/m3. The fillers were micro-silica of the average particle size of 1.5 μm and nano-silica of the average particle size of 12 nm. The concentration of fillers varied from 0-20%. The micro-silica filler did not show any significant effect on density of either rigid or flexible foams. Nano-silica increased the density of both types of foams only at concentration above 20%. Nano-silica lowered the compression strength of both types of foams at all concentrations while micro-silica exhibited the same effect at concentrations above 10%. The hardness and compression strength in flexible polyurethane foams with nano-silica was increased and the rebound resilience decreased. Reduced density of foams was not changed by nano-silica concentrations up to 20%. It is assumed that the nano-filler, as an additional physical crosslinker, increased modulus of the flexible segment in the polyurethane matrix, resulting in increased hardness and compression strength. The micro-filler in flexible foams lowered hardness and compression strength, but increased rebound resilience. Wide angle X-ray scattering (WAXS) showed amorphous morphology of both flexible and rigid foams filled with nano-silica. WAXS of the micro-silica filled foams showed the presence of randomly oriented crystalline quartz particles and the amorphous structure of the polymeric matrix. | en |
dc.relation.ispartof | Journal of Cellular Plastics | en |
dc.title | Effect of nano- and micro-silica fillers on polyurethane foam properties | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.doi | 10.1177/0021955X02038003139 | - |
dc.identifier.scopus | 2-s2.0-0036578614 | - |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/0036578614 | - |
dc.description.version | Unknown | en_US |
dc.relation.lastpage | 239 | en |
dc.relation.firstpage | 229 | en |
dc.relation.issue | 3 | en |
dc.relation.volume | 38 | en |
item.fulltext | No Fulltext | - |
item.grantfulltext | none | - |
Appears in Collections: | Naučne i umetničke publikacije |
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