Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species
In this study, effect of accelerated aging on adhesion strength of half-polyester and polyurethane transparent coatings were evaluated in maple and pine species. For this purpose, dried specimens with 12×110×550 millimeters were used. Sealer as substrate, and half-polyester and binary polyurethane a...
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| Format: | Article |
| Language: | fas |
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Regional Information Center for Science and Technology (RICeST)
2017-07-01
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| Series: | تحقیقات علوم چوب و کاغذ ایران |
| Subjects: | |
| Online Access: | http://ijwpr.areeo.ac.ir/article_109580_4efba94301700bea2b9d1885a77640da.pdf |
| _version_ | 1819202836778450944 |
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| author | Fatemeh Hasani Khorshidi Mehdi Emadi |
| author_facet | Fatemeh Hasani Khorshidi Mehdi Emadi |
| author_sort | Fatemeh Hasani Khorshidi |
| collection | DOAJ |
| description | In this study, effect of accelerated aging on adhesion strength of half-polyester and polyurethane transparent coatings were evaluated in maple and pine species. For this purpose, dried specimens with 12×110×550 millimeters were used. Sealer as substrate, and half-polyester and binary polyurethane as coatings were applied on wood. Coatings were implemented thereby film applicator and gun methods, and accelerated aging test of wood specimens was carried out according to ASTM D1037. Results indicated that maximum value of adhesion strength is belong to binary polyurethane in maple applied by film applicator and minimum for half-polyester in pine applied by gun method, in opposite. Due to thin film, velocity variations in gun method by painter person, and consequent rapid evaporation of thinner, adhesion decreased in comparison with film applicator method. Also it's found that accelerated aging diminished adhesion strength of coatings in both maple and pine species. It can be concluded during the accelerated aging test, the steam causes moisture absorption and swelling of the fibers near the surface and thus reduce the resistance of the coating adhesion.Long-term effect of humidity and aging makes Ecowool quickly lose their stickiness.And the effect of floating in the water samples, lignin degradation products in the process of steaming and freezing and heating washed by water And cause the loosening of the cellulosic fibers in the wood, resulting in wood adhesive strength is significantly reduced due to the accelerated aging test. |
| first_indexed | 2024-12-23T04:10:21Z |
| format | Article |
| id | doaj.art-069b8a039fe04b94ad0862f78769b1ef |
| institution | Directory Open Access Journal |
| issn | 1735-0913 2383-112X |
| language | fas |
| last_indexed | 2024-12-23T04:10:21Z |
| publishDate | 2017-07-01 |
| publisher | Regional Information Center for Science and Technology (RICeST) |
| record_format | Article |
| series | تحقیقات علوم چوب و کاغذ ایران |
| spelling | doaj.art-069b8a039fe04b94ad0862f78769b1ef2022-12-21T18:00:31ZfasRegional Information Center for Science and Technology (RICeST)تحقیقات علوم چوب و کاغذ ایران1735-09132383-112X2017-07-0132220521410.22092/ijwpr.2017.109580109580Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine speciesFatemeh Hasani Khorshidi0Mehdi Emadi1B.Sc., in Wood Engineering, Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, TehranM.Sc. in Wood Engineering, Faculty Natural Resources, Tarbiat Modares UniversityIn this study, effect of accelerated aging on adhesion strength of half-polyester and polyurethane transparent coatings were evaluated in maple and pine species. For this purpose, dried specimens with 12×110×550 millimeters were used. Sealer as substrate, and half-polyester and binary polyurethane as coatings were applied on wood. Coatings were implemented thereby film applicator and gun methods, and accelerated aging test of wood specimens was carried out according to ASTM D1037. Results indicated that maximum value of adhesion strength is belong to binary polyurethane in maple applied by film applicator and minimum for half-polyester in pine applied by gun method, in opposite. Due to thin film, velocity variations in gun method by painter person, and consequent rapid evaporation of thinner, adhesion decreased in comparison with film applicator method. Also it's found that accelerated aging diminished adhesion strength of coatings in both maple and pine species. It can be concluded during the accelerated aging test, the steam causes moisture absorption and swelling of the fibers near the surface and thus reduce the resistance of the coating adhesion.Long-term effect of humidity and aging makes Ecowool quickly lose their stickiness.And the effect of floating in the water samples, lignin degradation products in the process of steaming and freezing and heating washed by water And cause the loosening of the cellulosic fibers in the wood, resulting in wood adhesive strength is significantly reduced due to the accelerated aging test.http://ijwpr.areeo.ac.ir/article_109580_4efba94301700bea2b9d1885a77640da.pdfaccelerated agingMAPLEpineAdhesion strengthhalf-polyesterPolyurethane |
| spellingShingle | Fatemeh Hasani Khorshidi Mehdi Emadi Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species تحقیقات علوم چوب و کاغذ ایران accelerated aging MAPLE pine Adhesion strength half-polyester Polyurethane |
| title | Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species |
| title_full | Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species |
| title_fullStr | Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species |
| title_full_unstemmed | Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species |
| title_short | Studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species |
| title_sort | studying effect of accelerated aging on adhesion resistance of half polyester and polyurethane transparent coatings applied on maple and pine species |
| topic | accelerated aging MAPLE pine Adhesion strength half-polyester Polyurethane |
| url | http://ijwpr.areeo.ac.ir/article_109580_4efba94301700bea2b9d1885a77640da.pdf |
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