Temperature dependence of structural alteration by ultraviolet irradiation in acrylic-urethane coatings studied by positron annihilation spectroscopy and solvent swelling behavior
The structural alteration of acrylic-urethane coatings, induced by photo-aging, and its temperature dependence, was investigated using positron annihilation lifetime spectroscopy and solvent swelling experiments. The results revealed a slight structural alteration due to photo-aging at 20 °C. On the...
Gespeichert in:
| Veröffentlicht in: | Polymer degradation and stability 2019-04, Vol.162, p.85-93 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 93 |
|---|---|
| container_issue | |
| container_start_page | 85 |
| container_title | Polymer degradation and stability |
| container_volume | 162 |
| creator | Ishida, Takato Kitagaki, Ryoma Yamane, Shogo Hagihara, Hideaki |
| description | The structural alteration of acrylic-urethane coatings, induced by photo-aging, and its temperature dependence, was investigated using positron annihilation lifetime spectroscopy and solvent swelling experiments. The results revealed a slight structural alteration due to photo-aging at 20 °C. On the other hand, a significant structural alteration occurred due to photo-aging at 60 °C, which resulted in a decrease in the pore size and total pore volume. To study the mechanism of such morphological changes, infrared spectra were measured before and after aging the samples. The results revealed the breakage of the urethane crosslink points and the generation of various photo-products including peroxide species that can form hydrogen bonds. This indicates the foundation of new physical and chemical crosslinks (different from the initial urethane linkage). Based on the chemical modifications, probable mechanisms of the internal morphological changes are proposed. Moreover, the changes are mainly due to an enhancement in the chain-mobility, due to the destruction of the polymer network and an increase in the inter-chain interactions. The results of this study reveal that significant internal structural alterations can occur after sufficient damage to the initial network structure. The proposed explanation is reasonable in relation to the temperature dependence of photo-induced structural alterations, and with respect to the molecular mobility and reaction ratio of photo-oxidation.
•Photo-degradation of the acrylic-urethane coating was investigated.•Reduction in pore size and pore volume was observed for the degraded coating.•Polymer-chain scission induces a high mobility of the network structure.•Structural alteration by degradation showed temperature dependent.•Marked degradation occurs over the glass transition temperature. |
| doi_str_mv | 10.1016/j.polymdegradstab.2019.02.007 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2222921043</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0141391019300606</els_id><sourcerecordid>2222921043</sourcerecordid><originalsourceid>FETCH-LOGICAL-c464t-d8d451fd82173e6e8b027e9d17eaafc3fb34384a005de8de45e195ccfb2951043</originalsourceid><addsrcrecordid>eNqNUc1q3DAQFqWFbpO-g6DkaFeS7bV9yCGENg0EcknOQpbGWS1ayZXkDX6uvmDGuKecMhfBzPczo4-QK85Kzvj-57GcgltOBl6iMimroRSM9yUTJWPtJ7LjXVsVohL8M9kxXvOi6jn7Sr6ldGRYdcN35N8TnCaIKs8RqIEJvAGvgYaRphxnjX3lqHJ5xdjg6bDQ2eWozjY4yNRG9LbbyHqqdFyc1QWq5YPyQHXAmX9JqDYbC2blTyHZHJGgvLcH6zZ2mkBjN-kwLTgxNAV3Bp9pegXnUIMOcFht4yX5MiqX4Pv_94I8__71dPuneHi8u7-9eSh0va9zYTqDJ46mE7ytYA_dwEQLveEtKDXqahyquupqxVhjoDNQN8D7RutxEH3DWV1dkB-b7hTD3xlSlscwR4-WUmD1YgUh6npDaVw-RRjlFO1JxUVyJtec5FG-y0muOUkmJOaE_LuND3jK2UKUSds1A2Mj_og0wX5Q6Q1QFq0-</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2222921043</pqid></control><display><type>article</type><title>Temperature dependence of structural alteration by ultraviolet irradiation in acrylic-urethane coatings studied by positron annihilation spectroscopy and solvent swelling behavior</title><source>Access via ScienceDirect (Elsevier)</source><creator>Ishida, Takato ; Kitagaki, Ryoma ; Yamane, Shogo ; Hagihara, Hideaki</creator><creatorcontrib>Ishida, Takato ; Kitagaki, Ryoma ; Yamane, Shogo ; Hagihara, Hideaki</creatorcontrib><description>The structural alteration of acrylic-urethane coatings, induced by photo-aging, and its temperature dependence, was investigated using positron annihilation lifetime spectroscopy and solvent swelling experiments. The results revealed a slight structural alteration due to photo-aging at 20 °C. On the other hand, a significant structural alteration occurred due to photo-aging at 60 °C, which resulted in a decrease in the pore size and total pore volume. To study the mechanism of such morphological changes, infrared spectra were measured before and after aging the samples. The results revealed the breakage of the urethane crosslink points and the generation of various photo-products including peroxide species that can form hydrogen bonds. This indicates the foundation of new physical and chemical crosslinks (different from the initial urethane linkage). Based on the chemical modifications, probable mechanisms of the internal morphological changes are proposed. Moreover, the changes are mainly due to an enhancement in the chain-mobility, due to the destruction of the polymer network and an increase in the inter-chain interactions. The results of this study reveal that significant internal structural alterations can occur after sufficient damage to the initial network structure. The proposed explanation is reasonable in relation to the temperature dependence of photo-induced structural alterations, and with respect to the molecular mobility and reaction ratio of photo-oxidation.
•Photo-degradation of the acrylic-urethane coating was investigated.•Reduction in pore size and pore volume was observed for the degraded coating.•Polymer-chain scission induces a high mobility of the network structure.•Structural alteration by degradation showed temperature dependent.•Marked degradation occurs over the glass transition temperature.</description><identifier>ISSN: 0141-3910</identifier><identifier>EISSN: 1873-2321</identifier><identifier>DOI: 10.1016/j.polymdegradstab.2019.02.007</identifier><language>eng</language><publisher>London: Elsevier Ltd</publisher><subject>Aging ; Breakage ; Chain mobility ; Coatings ; Crosslinking ; Hydrogen bonds ; Infrared spectra ; Infrared spectroscopy ; Organic chemistry ; Oxidation ; Photo-degradation ; Pore size ; Porosity ; Positron annihilation ; Positron annihilation spectroscopy ; Protective coatings ; Solvent swelling ; Solvents ; Spectrum analysis ; Structural alteration ; Structural damage ; Studies ; Swelling ; Temperature ; Temperature dependence ; Ultraviolet radiation</subject><ispartof>Polymer degradation and stability, 2019-04, Vol.162, p.85-93</ispartof><rights>2019 Elsevier Ltd</rights><rights>Copyright Elsevier BV Apr 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c464t-d8d451fd82173e6e8b027e9d17eaafc3fb34384a005de8de45e195ccfb2951043</citedby><cites>FETCH-LOGICAL-c464t-d8d451fd82173e6e8b027e9d17eaafc3fb34384a005de8de45e195ccfb2951043</cites><orcidid>0000-0001-9790-8864 ; 0000-0002-4025-8829</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.polymdegradstab.2019.02.007$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Ishida, Takato</creatorcontrib><creatorcontrib>Kitagaki, Ryoma</creatorcontrib><creatorcontrib>Yamane, Shogo</creatorcontrib><creatorcontrib>Hagihara, Hideaki</creatorcontrib><title>Temperature dependence of structural alteration by ultraviolet irradiation in acrylic-urethane coatings studied by positron annihilation spectroscopy and solvent swelling behavior</title><title>Polymer degradation and stability</title><description>The structural alteration of acrylic-urethane coatings, induced by photo-aging, and its temperature dependence, was investigated using positron annihilation lifetime spectroscopy and solvent swelling experiments. The results revealed a slight structural alteration due to photo-aging at 20 °C. On the other hand, a significant structural alteration occurred due to photo-aging at 60 °C, which resulted in a decrease in the pore size and total pore volume. To study the mechanism of such morphological changes, infrared spectra were measured before and after aging the samples. The results revealed the breakage of the urethane crosslink points and the generation of various photo-products including peroxide species that can form hydrogen bonds. This indicates the foundation of new physical and chemical crosslinks (different from the initial urethane linkage). Based on the chemical modifications, probable mechanisms of the internal morphological changes are proposed. Moreover, the changes are mainly due to an enhancement in the chain-mobility, due to the destruction of the polymer network and an increase in the inter-chain interactions. The results of this study reveal that significant internal structural alterations can occur after sufficient damage to the initial network structure. The proposed explanation is reasonable in relation to the temperature dependence of photo-induced structural alterations, and with respect to the molecular mobility and reaction ratio of photo-oxidation.
•Photo-degradation of the acrylic-urethane coating was investigated.•Reduction in pore size and pore volume was observed for the degraded coating.•Polymer-chain scission induces a high mobility of the network structure.•Structural alteration by degradation showed temperature dependent.•Marked degradation occurs over the glass transition temperature.</description><subject>Aging</subject><subject>Breakage</subject><subject>Chain mobility</subject><subject>Coatings</subject><subject>Crosslinking</subject><subject>Hydrogen bonds</subject><subject>Infrared spectra</subject><subject>Infrared spectroscopy</subject><subject>Organic chemistry</subject><subject>Oxidation</subject><subject>Photo-degradation</subject><subject>Pore size</subject><subject>Porosity</subject><subject>Positron annihilation</subject><subject>Positron annihilation spectroscopy</subject><subject>Protective coatings</subject><subject>Solvent swelling</subject><subject>Solvents</subject><subject>Spectrum analysis</subject><subject>Structural alteration</subject><subject>Structural damage</subject><subject>Studies</subject><subject>Swelling</subject><subject>Temperature</subject><subject>Temperature dependence</subject><subject>Ultraviolet radiation</subject><issn>0141-3910</issn><issn>1873-2321</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqNUc1q3DAQFqWFbpO-g6DkaFeS7bV9yCGENg0EcknOQpbGWS1ayZXkDX6uvmDGuKecMhfBzPczo4-QK85Kzvj-57GcgltOBl6iMimroRSM9yUTJWPtJ7LjXVsVohL8M9kxXvOi6jn7Sr6ldGRYdcN35N8TnCaIKs8RqIEJvAGvgYaRphxnjX3lqHJ5xdjg6bDQ2eWozjY4yNRG9LbbyHqqdFyc1QWq5YPyQHXAmX9JqDYbC2blTyHZHJGgvLcH6zZ2mkBjN-kwLTgxNAV3Bp9pegXnUIMOcFht4yX5MiqX4Pv_94I8__71dPuneHi8u7-9eSh0va9zYTqDJ46mE7ytYA_dwEQLveEtKDXqahyquupqxVhjoDNQN8D7RutxEH3DWV1dkB-b7hTD3xlSlscwR4-WUmD1YgUh6npDaVw-RRjlFO1JxUVyJtec5FG-y0muOUkmJOaE_LuND3jK2UKUSds1A2Mj_og0wX5Q6Q1QFq0-</recordid><startdate>20190401</startdate><enddate>20190401</enddate><creator>Ishida, Takato</creator><creator>Kitagaki, Ryoma</creator><creator>Yamane, Shogo</creator><creator>Hagihara, Hideaki</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0001-9790-8864</orcidid><orcidid>https://orcid.org/0000-0002-4025-8829</orcidid></search><sort><creationdate>20190401</creationdate><title>Temperature dependence of structural alteration by ultraviolet irradiation in acrylic-urethane coatings studied by positron annihilation spectroscopy and solvent swelling behavior</title><author>Ishida, Takato ; Kitagaki, Ryoma ; Yamane, Shogo ; Hagihara, Hideaki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c464t-d8d451fd82173e6e8b027e9d17eaafc3fb34384a005de8de45e195ccfb2951043</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Aging</topic><topic>Breakage</topic><topic>Chain mobility</topic><topic>Coatings</topic><topic>Crosslinking</topic><topic>Hydrogen bonds</topic><topic>Infrared spectra</topic><topic>Infrared spectroscopy</topic><topic>Organic chemistry</topic><topic>Oxidation</topic><topic>Photo-degradation</topic><topic>Pore size</topic><topic>Porosity</topic><topic>Positron annihilation</topic><topic>Positron annihilation spectroscopy</topic><topic>Protective coatings</topic><topic>Solvent swelling</topic><topic>Solvents</topic><topic>Spectrum analysis</topic><topic>Structural alteration</topic><topic>Structural damage</topic><topic>Studies</topic><topic>Swelling</topic><topic>Temperature</topic><topic>Temperature dependence</topic><topic>Ultraviolet radiation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ishida, Takato</creatorcontrib><creatorcontrib>Kitagaki, Ryoma</creatorcontrib><creatorcontrib>Yamane, Shogo</creatorcontrib><creatorcontrib>Hagihara, Hideaki</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Polymer degradation and stability</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ishida, Takato</au><au>Kitagaki, Ryoma</au><au>Yamane, Shogo</au><au>Hagihara, Hideaki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Temperature dependence of structural alteration by ultraviolet irradiation in acrylic-urethane coatings studied by positron annihilation spectroscopy and solvent swelling behavior</atitle><jtitle>Polymer degradation and stability</jtitle><date>2019-04-01</date><risdate>2019</risdate><volume>162</volume><spage>85</spage><epage>93</epage><pages>85-93</pages><issn>0141-3910</issn><eissn>1873-2321</eissn><abstract>The structural alteration of acrylic-urethane coatings, induced by photo-aging, and its temperature dependence, was investigated using positron annihilation lifetime spectroscopy and solvent swelling experiments. The results revealed a slight structural alteration due to photo-aging at 20 °C. On the other hand, a significant structural alteration occurred due to photo-aging at 60 °C, which resulted in a decrease in the pore size and total pore volume. To study the mechanism of such morphological changes, infrared spectra were measured before and after aging the samples. The results revealed the breakage of the urethane crosslink points and the generation of various photo-products including peroxide species that can form hydrogen bonds. This indicates the foundation of new physical and chemical crosslinks (different from the initial urethane linkage). Based on the chemical modifications, probable mechanisms of the internal morphological changes are proposed. Moreover, the changes are mainly due to an enhancement in the chain-mobility, due to the destruction of the polymer network and an increase in the inter-chain interactions. The results of this study reveal that significant internal structural alterations can occur after sufficient damage to the initial network structure. The proposed explanation is reasonable in relation to the temperature dependence of photo-induced structural alterations, and with respect to the molecular mobility and reaction ratio of photo-oxidation.
•Photo-degradation of the acrylic-urethane coating was investigated.•Reduction in pore size and pore volume was observed for the degraded coating.•Polymer-chain scission induces a high mobility of the network structure.•Structural alteration by degradation showed temperature dependent.•Marked degradation occurs over the glass transition temperature.</abstract><cop>London</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.polymdegradstab.2019.02.007</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-9790-8864</orcidid><orcidid>https://orcid.org/0000-0002-4025-8829</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0141-3910 |
| ispartof | Polymer degradation and stability, 2019-04, Vol.162, p.85-93 |
| issn | 0141-3910 1873-2321 |
| language | eng |
| recordid | cdi_proquest_journals_2222921043 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | Aging Breakage Chain mobility Coatings Crosslinking Hydrogen bonds Infrared spectra Infrared spectroscopy Organic chemistry Oxidation Photo-degradation Pore size Porosity Positron annihilation Positron annihilation spectroscopy Protective coatings Solvent swelling Solvents Spectrum analysis Structural alteration Structural damage Studies Swelling Temperature Temperature dependence Ultraviolet radiation |
| title | Temperature dependence of structural alteration by ultraviolet irradiation in acrylic-urethane coatings studied by positron annihilation spectroscopy and solvent swelling behavior |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-29T08%3A14%3A47IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Temperature%20dependence%20of%20structural%20alteration%20by%20ultraviolet%20irradiation%20in%20acrylic-urethane%20coatings%20studied%20by%20positron%20annihilation%20spectroscopy%20and%20solvent%20swelling%20behavior&rft.jtitle=Polymer%20degradation%20and%20stability&rft.au=Ishida,%20Takato&rft.date=2019-04-01&rft.volume=162&rft.spage=85&rft.epage=93&rft.pages=85-93&rft.issn=0141-3910&rft.eissn=1873-2321&rft_id=info:doi/10.1016/j.polymdegradstab.2019.02.007&rft_dat=%3Cproquest_cross%3E2222921043%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2222921043&rft_id=info:pmid/&rft_els_id=S0141391019300606&rfr_iscdi=true |