Accelerated weathering performance of Scots pine preimpregnated with copper-based chemicals before varnish coating - Part 1 : coated with cellulosic and polyurethane varnishes / Ahmet Gunduz in COLORATION TECHNOLOGY, Vol. 136, N° 1 (02/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 1 (02/2020) . - p. 34-44 Titre : Accelerated weathering performance of Scots pine preimpregnated with copper-based chemicals before varnish coating - Part 1 : coated with cellulosic and polyurethane varnishes Type de document : texte imprimé Auteurs : Ahmet Gunduz, Auteur ; Ergun Baysal, Auteur ; Turkay Turkoglu, Auteur ; Caglar Altay, Auteur ; Mustafa kucuktuvek, Auteur ; Huseyin Peker, Auteur Année de publication : 2020 Article en page(s) : p. 34-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Cuivre Décoloration Essais accélérés (technologie) Matériaux -- Imprégnation Pin sylvestre Polyuréthanes Vernis Index. décimale : 667.7 Cires, laques, vernis Résumé : This study aimed to determine the effect of accelerated weathering on gloss, surface hardness and colour changes of Scots pine (Pinus sylvestris L.). Test samples were impregnated with Adolit KD-5, Wolmanit CX-8 and Celcure AC-500 covered with cellulosic and polyurethane varnishes. The results showed that the values of surface hardness and gloss increased after accelerated weathering. While the surface hardness of Scots pine was increased for impregnated and polyurethane-coated varnish, it decreased for impregnated and cellulosic varnish-coated Scots pine after 1000 hours of accelerated weathering exposure. Copper-based chemical impregnation and varnish coating developed the gloss of Scots pine specimens relative to the surface characteristics observed in single-coated Scots pine specimens. While the most appropriate chemical was Celcure AC-500 for surface hardness, it was Adolit KD-5 for the gloss of Scots pine after 1000 hours of accelerated weathering exposure. Wood specimens impregnated prior to the application of varnish were more effective in stabilising the colour of Scots pine than Scots pine only coated with varnish. Polyurethane varnish-treated Scots pine showed better colour stability for each partial and total accelerated weathering exposure period. The total colour changes were lowest for polyurethane varnish-coated Scots pine impregnated with Celcure AC-500 after 1000 hours of accelerated weathering exposure. Note de contenu : - EXPERIMENTAL : Preparation of wood specimens and chemicals - Impregnation procedure - Coating of the wood surfaces - Surface hardness test - Gloss test - Colour test - Accelerated weathering test - RESULTS AND DISCUSSION : Surface hardness changes - Gloss changes - Colour changes DOI : https://doi.org/10.1111/cote.12435 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12435 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33698 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21546	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The effect of processing and treatment parameters on the discoloration of painted joinery due to resin exudation from knots / R. M. Nussbaum in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B3 (09/2004)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B3 (09/2004) . - p. 181-186 Titre : The effect of processing and treatment parameters on the discoloration of painted joinery due to resin exudation from knots Type de document : texte imprimé Auteurs : R. M. Nussbaum, Auteur Année de publication : 2004 Article en page(s) : p. 181-186 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Décoloration Exsudation Gommes et résines Noeuds du bois Pin sylvestre Revêtement en phase solvant Statistique Index. décimale : 667.9 Revêtements et enduits Résumé : The effect of different parameters regarding the processing and treatment on the discoloration of knots (so called knot yellowing) on painted joinery of Scots pine was evaluated in an extensive study. The parameters studied included the kiln-drying temperature, the distance of the knot from the original kiln-dried surface, type of preservative treatment and the type of coating system. Wood samples representing 92 different test classes were exposed outdoors for five months. Knot yellowing was measured with a colour difference meter. Statistical evaluation of the results was performed by multivariate data analysis. Knot yellowing was affected by several of the studied factors, although the largest effect was provided by preservative treatment with solvent-borne products. Note de contenu : - EXPERIMENTAL : General test design -Kinl drying - Test material - Treatments - Exposure and measurement of discoloration - STATISTICAL ANALYSIS AND RESULTS : - Table 1 : Retention data for the solvent-borne wood preservative systems - Table 2 : Coating Systems DOI : 10.1007/BF02699633 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699633.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5456 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
000390	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)