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Long‐term thermal conductivity of cyclopentane–water blown rigid polyurethane foams reinforced with different types of fillers
An understanding of the long‐term thermal conductivity of rigid polyurethane (RPU) foams presents great interest in the building field considering the conservation of energy efficiency. In this study, the effect of different types of particles (talc, diatomaceous earth and non‐porous silica) on the...
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| Published in: | Polymer international 2019-10, Vol.68 (10), p.1826-1835 |
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| Main Authors: | , , , , |
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| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c3593-c8ceba3da6d17ee4cf35bff94fe9f31fcdc731959d152a636e4047123d3005db3 |
| container_end_page | 1835 |
| container_issue | 10 |
| container_start_page | 1826 |
| container_title | Polymer international |
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| creator | Santiago‐Calvo, Mercedes Tirado‐Mediavilla, Josías Ruiz‐Herrero, José Luis Villafañe, Fernando Rodríguez‐Pérez, Miguel Ángel |
| description | An understanding of the long‐term thermal conductivity of rigid polyurethane (RPU) foams presents great interest in the building field considering the conservation of energy efficiency. In this study, the effect of different types of particles (talc, diatomaceous earth and non‐porous silica) on the thermal conductivity of RPU foams blown with cyclopentane and water as blowing agents was investigated during 3 years of aging. The characterization of the cellular structure shows how the addition of particles causes a cell size reduction of the foams, and consequently an enhancement of the thermal properties just after production. However, this initial reduction is not maintained, because each foam shows a different thermal conductivity evolution with time. We have found, for the first time, a relationship between the slope of the thermal conductivity versus time at the first measurements and the internal temperature reached during the foaming process. The evolution of the RPU foams in which higher internal temperatures were reached is more pronounced than in those RPU foams where lower foaming temperatures were observed. This effect is related to the kinetics of the diffusion of the gas occluded inside the cells and imposes a new criterion for the selection of particles to reduce the thermal conductivity of RPU foams; these additives should ideally decrease the temperature reached during the foaming process. Moreover, the effect of aging on the thermal conductivity is explained by using theoretical models. © 2019 Society of Chemical Industry
The long‐term thermal conductivity of water‐cyclopentane blown rigid polyurethane composite foams has been studied during 3 years of aging. The initial measurements of filled foams showed an improvement of the thermal properties due to a decrease in the radiation contribution. However, this initial reduction was not maintained, because each foam showed a different thermal conductivity evolution with time, which has been related to the foaming temperature reached during the foam production. |
| doi_str_mv | 10.1002/pi.5893 |
| format | article |
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The long‐term thermal conductivity of water‐cyclopentane blown rigid polyurethane composite foams has been studied during 3 years of aging. The initial measurements of filled foams showed an improvement of the thermal properties due to a decrease in the radiation contribution. However, this initial reduction was not maintained, because each foam showed a different thermal conductivity evolution with time, which has been related to the foaming temperature reached during the foam production.</description><identifier>ISSN: 0959-8103</identifier><identifier>EISSN: 1097-0126</identifier><identifier>DOI: 10.1002/pi.5893</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>Additives ; Aging ; Blowing agents ; Cell size ; Cellular structure ; composites ; Cyclopentane ; Diatomaceous earth ; Energy conservation ; Evolution ; Fillers ; Foaming ; foaming temperature ; foams ; Heat conductivity ; Heat transfer ; Organic chemistry ; Plastic foam ; Polyurethane ; Polyurethane foam ; Reaction kinetics ; Silica ; Silicon dioxide ; Size reduction ; Structural analysis ; Talc ; Thermal conductivity ; Thermodynamic properties</subject><ispartof>Polymer international, 2019-10, Vol.68 (10), p.1826-1835</ispartof><rights>2019 Society of Chemical Industry</rights><rights>Copyright © 2019 Society of Chemical Industry</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3593-c8ceba3da6d17ee4cf35bff94fe9f31fcdc731959d152a636e4047123d3005db3</citedby><cites>FETCH-LOGICAL-c3593-c8ceba3da6d17ee4cf35bff94fe9f31fcdc731959d152a636e4047123d3005db3</cites><orcidid>0000-0001-7678-5746</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fpi.5893$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fpi.5893$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,786,790,27957,27958,50923,51032</link.rule.ids></links><search><creatorcontrib>Santiago‐Calvo, Mercedes</creatorcontrib><creatorcontrib>Tirado‐Mediavilla, Josías</creatorcontrib><creatorcontrib>Ruiz‐Herrero, José Luis</creatorcontrib><creatorcontrib>Villafañe, Fernando</creatorcontrib><creatorcontrib>Rodríguez‐Pérez, Miguel Ángel</creatorcontrib><title>Long‐term thermal conductivity of cyclopentane–water blown rigid polyurethane foams reinforced with different types of fillers</title><title>Polymer international</title><description>An understanding of the long‐term thermal conductivity of rigid polyurethane (RPU) foams presents great interest in the building field considering the conservation of energy efficiency. In this study, the effect of different types of particles (talc, diatomaceous earth and non‐porous silica) on the thermal conductivity of RPU foams blown with cyclopentane and water as blowing agents was investigated during 3 years of aging. The characterization of the cellular structure shows how the addition of particles causes a cell size reduction of the foams, and consequently an enhancement of the thermal properties just after production. However, this initial reduction is not maintained, because each foam shows a different thermal conductivity evolution with time. We have found, for the first time, a relationship between the slope of the thermal conductivity versus time at the first measurements and the internal temperature reached during the foaming process. The evolution of the RPU foams in which higher internal temperatures were reached is more pronounced than in those RPU foams where lower foaming temperatures were observed. This effect is related to the kinetics of the diffusion of the gas occluded inside the cells and imposes a new criterion for the selection of particles to reduce the thermal conductivity of RPU foams; these additives should ideally decrease the temperature reached during the foaming process. Moreover, the effect of aging on the thermal conductivity is explained by using theoretical models. © 2019 Society of Chemical Industry
The long‐term thermal conductivity of water‐cyclopentane blown rigid polyurethane composite foams has been studied during 3 years of aging. The initial measurements of filled foams showed an improvement of the thermal properties due to a decrease in the radiation contribution. However, this initial reduction was not maintained, because each foam showed a different thermal conductivity evolution with time, which has been related to the foaming temperature reached during the foam production.</description><subject>Additives</subject><subject>Aging</subject><subject>Blowing agents</subject><subject>Cell size</subject><subject>Cellular structure</subject><subject>composites</subject><subject>Cyclopentane</subject><subject>Diatomaceous earth</subject><subject>Energy conservation</subject><subject>Evolution</subject><subject>Fillers</subject><subject>Foaming</subject><subject>foaming temperature</subject><subject>foams</subject><subject>Heat conductivity</subject><subject>Heat transfer</subject><subject>Organic chemistry</subject><subject>Plastic foam</subject><subject>Polyurethane</subject><subject>Polyurethane foam</subject><subject>Reaction kinetics</subject><subject>Silica</subject><subject>Silicon dioxide</subject><subject>Size reduction</subject><subject>Structural analysis</subject><subject>Talc</subject><subject>Thermal conductivity</subject><subject>Thermodynamic properties</subject><issn>0959-8103</issn><issn>1097-0126</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp10L9OwzAQBnALgUQpiFewxMCAUuw4aeIRVfypVAkGmCPHPreu0jjYDlG2iidA4g37JKSUleVu-ek73YfQJSUTSkh825hJmnN2hEaU8CwiNJ4eoxHhKY9yStgpOvN-TQjJOecj9Lmw9XK3_QrgNjishikqLG2tWhnMhwk9thrLXla2gTqIGnbb704MGpeV7WrszNIo3Niqbx2E1QCwtmLjsQNTa-skKNyZsMLKaA1uyMChb8DvY7WpKnD-HJ1oUXm4-Ntj9PZw_zp7ihbPj_PZ3SKSLOUskrmEUjAlpopmAInULC215okGrhnVUsmM0eFNRdNYTNkUEpJkNGaKEZKqko3R1SG3cfa9BR-KtW1dPZws4jjPGGExYYO6PijprPcOdNE4sxGuLygp9gUXjSn2BQ_y5iA7U0H_Hyte5r_6B3cKgRI</recordid><startdate>201910</startdate><enddate>201910</enddate><creator>Santiago‐Calvo, Mercedes</creator><creator>Tirado‐Mediavilla, Josías</creator><creator>Ruiz‐Herrero, José Luis</creator><creator>Villafañe, Fernando</creator><creator>Rodríguez‐Pérez, Miguel Ángel</creator><general>John Wiley & Sons, Ltd</general><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0001-7678-5746</orcidid></search><sort><creationdate>201910</creationdate><title>Long‐term thermal conductivity of cyclopentane–water blown rigid polyurethane foams reinforced with different types of fillers</title><author>Santiago‐Calvo, Mercedes ; Tirado‐Mediavilla, Josías ; Ruiz‐Herrero, José Luis ; Villafañe, Fernando ; Rodríguez‐Pérez, Miguel Ángel</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3593-c8ceba3da6d17ee4cf35bff94fe9f31fcdc731959d152a636e4047123d3005db3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Additives</topic><topic>Aging</topic><topic>Blowing agents</topic><topic>Cell size</topic><topic>Cellular structure</topic><topic>composites</topic><topic>Cyclopentane</topic><topic>Diatomaceous earth</topic><topic>Energy conservation</topic><topic>Evolution</topic><topic>Fillers</topic><topic>Foaming</topic><topic>foaming temperature</topic><topic>foams</topic><topic>Heat conductivity</topic><topic>Heat transfer</topic><topic>Organic chemistry</topic><topic>Plastic foam</topic><topic>Polyurethane</topic><topic>Polyurethane foam</topic><topic>Reaction kinetics</topic><topic>Silica</topic><topic>Silicon dioxide</topic><topic>Size reduction</topic><topic>Structural analysis</topic><topic>Talc</topic><topic>Thermal conductivity</topic><topic>Thermodynamic properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Santiago‐Calvo, Mercedes</creatorcontrib><creatorcontrib>Tirado‐Mediavilla, Josías</creatorcontrib><creatorcontrib>Ruiz‐Herrero, José Luis</creatorcontrib><creatorcontrib>Villafañe, Fernando</creatorcontrib><creatorcontrib>Rodríguez‐Pérez, Miguel Ángel</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><jtitle>Polymer international</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Santiago‐Calvo, Mercedes</au><au>Tirado‐Mediavilla, Josías</au><au>Ruiz‐Herrero, José Luis</au><au>Villafañe, Fernando</au><au>Rodríguez‐Pérez, Miguel Ángel</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Long‐term thermal conductivity of cyclopentane–water blown rigid polyurethane foams reinforced with different types of fillers</atitle><jtitle>Polymer international</jtitle><date>2019-10</date><risdate>2019</risdate><volume>68</volume><issue>10</issue><spage>1826</spage><epage>1835</epage><pages>1826-1835</pages><issn>0959-8103</issn><eissn>1097-0126</eissn><abstract>An understanding of the long‐term thermal conductivity of rigid polyurethane (RPU) foams presents great interest in the building field considering the conservation of energy efficiency. In this study, the effect of different types of particles (talc, diatomaceous earth and non‐porous silica) on the thermal conductivity of RPU foams blown with cyclopentane and water as blowing agents was investigated during 3 years of aging. The characterization of the cellular structure shows how the addition of particles causes a cell size reduction of the foams, and consequently an enhancement of the thermal properties just after production. However, this initial reduction is not maintained, because each foam shows a different thermal conductivity evolution with time. We have found, for the first time, a relationship between the slope of the thermal conductivity versus time at the first measurements and the internal temperature reached during the foaming process. The evolution of the RPU foams in which higher internal temperatures were reached is more pronounced than in those RPU foams where lower foaming temperatures were observed. This effect is related to the kinetics of the diffusion of the gas occluded inside the cells and imposes a new criterion for the selection of particles to reduce the thermal conductivity of RPU foams; these additives should ideally decrease the temperature reached during the foaming process. Moreover, the effect of aging on the thermal conductivity is explained by using theoretical models. © 2019 Society of Chemical Industry
The long‐term thermal conductivity of water‐cyclopentane blown rigid polyurethane composite foams has been studied during 3 years of aging. The initial measurements of filled foams showed an improvement of the thermal properties due to a decrease in the radiation contribution. However, this initial reduction was not maintained, because each foam showed a different thermal conductivity evolution with time, which has been related to the foaming temperature reached during the foam production.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/pi.5893</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-7678-5746</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Polymer international, 2019-10, Vol.68 (10), p.1826-1835 |
| issn | 0959-8103 1097-0126 |
| language | eng |
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| source | Wiley-Blackwell Journals |
| subjects | Additives Aging Blowing agents Cell size Cellular structure composites Cyclopentane Diatomaceous earth Energy conservation Evolution Fillers Foaming foaming temperature foams Heat conductivity Heat transfer Organic chemistry Plastic foam Polyurethane Polyurethane foam Reaction kinetics Silica Silicon dioxide Size reduction Structural analysis Talc Thermal conductivity Thermodynamic properties |
| title | Long‐term thermal conductivity of cyclopentane–water blown rigid polyurethane foams reinforced with different types of fillers |
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