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Evaluation method of the resistance of adhesives / Elisabeth Stammen in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 2/2017 (2017)
[article]
Titre : Evaluation method of the resistance of adhesives Type de document : texte imprimé Auteurs : Elisabeth Stammen, Auteur ; Frauke Bunzel, Auteur ; Klaus Dilger, Auteur Année de publication : 2017 Article en page(s) : p. 14-19 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs -- Détérioration
Epoxydes
Essais accélérés (technologie)
Evaluation
Oxydation thermique
Polyacrylates
Polyacryliques
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Rubans adhésifs
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
ThermogravimétrieIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : The aging behavior of adhesive polymers due to the influence of temperature and oxygen varies depending on their chemical base. DSC methods could replace long-term aging tests in the optimization of adhesive systems and would accelerate the validation processes. Note de contenu : - Aging by thermal oxidative degradation processes
- Analytical methods
- Methods in comparison
- Examples of selected adhesives tapes
- TABLES : Onset temperatures of the TGA of a stabilized and non-stabilized acrylate adhesive - 2. Onset temperatures from OOT measurements for epoxy A, B and C
- FIGURES : 1. Schematic diagram of OOT method - 2. Schematic diagram of the OIT method - 3. TGA of a non-stabilized and a stabilized acrylate adhesive for three different heating rates - 4. OIT measurements for a stabilized and non-stabilized acrylic adhesive at various temperatures (green/brown 190°C, violet/blue 180°C, black/red 170°C - 5. Comparison of the determined resistance of an acrylate adhesive from OOT and OIT measurements as well as furnace aging at different temperatures - 6. Comparison of the determined resistance of two silicones from OOT measurements as well as the furnace aging at different temperatures. Silicone 1 is not stabilized, silicone 2 is stabilized - 7. TGA of the investigated epoxides A, B and C - 8. OOT measurements for several heating rates for epoxy adhesive A - 9. Comparison of the determined resistance by means of OOT and furnace aging at 90°C for epoxy A,B and CPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28693
in ADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 2/2017 (2017) . - p. 14-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19013 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of glass bubbles for solar heat reflection in waterborne acrylic elastomeric roof coatings / Kevin Rink in COATINGS TECH, Vol. 13, N° 9 (09/2016)
[article]
Titre : Evaluation of glass bubbles for solar heat reflection in waterborne acrylic elastomeric roof coatings Type de document : texte imprimé Auteurs : Kevin Rink, Auteur ; Andrea Charif Rodriguez, Auteur Année de publication : 2016 Article en page(s) : p. 40-48 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Charges (matériaux)
Chlorure de polyvinyle
Economies d'énergie
Elastomères
Essais accélérés (technologie)
Formulation (Génie chimique)
Polyacryliques
Réflectivité thermique
Revêtements:Peinture
Sphères creuses
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, all of the white paints generally exhibit industry acceptable initial solar reflectance index values,2 and thus offer varying degrees of potential savings over a black roof baseline. Paints made with glass bubbles offered the highest degree of potential energy savings based on the fillers studied in this experiment. This study does not take into account the other parameters that qualify an acceptable elastomeric roof coating such as elongation, water resistance, etc. Final formulations need to be tested for ail specified properties to determine final acceptante per customer specifications. New studies have suggested maintaining certain minimum SRI values after actual outdoor weathering intervals. These and other studies such as the impact of glass bubbles on the solar reflectance of colored paints may form the basis for future studies. The white elastomeric paints in this study target low sloped roofs such as those utilized in industrial applications. Higher sloped roofs using other colors for residential applications could potentially benefit from these same materials.
White elastomeric waterborne acrylic roof coatings made with glass bubbles can offer formulators an alternative to other conventional fillers used in these coatings. The smaller glass bubbles offer increased solar reflectance and thermal advantages, which in turn could result in energy savings. The smaller bubbles also offer higher strength which could be beneficial for higher pressure applications such as airless spraying. In addition, the smaller bubbles yield a smoother appearance and good dirt pick-up resistance. The magnitude of these benefits needs to be evaluated by each formulator for their particular application and formulation.Note de contenu : - Opacity, gloss, and thickness
- Solar reflectance
- Thermal emittance test
- Infrared heat lamp test
- GB3 loading (PVC) study
- Accelerated weathering studies
- Additional experiment : using glass bubbles as a post-addition additive
- Energy savingsEn ligne : https://drive.google.com/file/d/1wrJfZjtAQkhR7SxdqkAdAKT6xNW9AyET/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27048
in COATINGS TECH > Vol. 13, N° 9 (09/2016) . - p. 40-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18377 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the ASTM D7869-13 test method to predict the gloss and color retention of premium architectural finishes-I / Kurt Wood in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
[article]
Titre : Evaluation of the ASTM D7869-13 test method to predict the gloss and color retention of premium architectural finishes-I Type de document : texte imprimé Auteurs : Kurt Wood, Auteur Année de publication : 2018 Article en page(s) : p. 933-943 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Dioxyde de titane
Durée de vie (Ingénierie)
Essais (technologie)
Essais accélérés (technologie)
Evaluation
Lampe au xénon
Polyfluorure de vinylidène
Prévision, Théorie de la
Résistance aux conditions climatiques
Revêtements -- Effets du climat:Peinture -- Effets du climat
Revêtements -- Normes:Peinture -- Normes
Revêtements en bâtiment:Peinture en bâtimentIndex. décimale : 667.9 Revêtements et enduits Résumé : A recently developed xenon arc-based accelerated weathering cycle, ASTM D7869-13, has been validated for automotive and aerospace coatings, but its ability to predict the gloss and color retention of premium architectural finishes has not yet been evaluated. We review new weathering data comparing the performance of poly(vinylidene fluoride) (PVDF) architectural finishes in south Florida exposure as well as several accelerated exposure methods including ASTM D7869-13. ASTM D7869 accurately reproduced Florida rank order gloss and color retention trends for coatings made with PVDF-acrylic blends and inorganic pigments, as well as the gloss and color changes seen in Florida for 70% PVDF masstone coatings made with a number of single organic pigments. However, the D7869 cycle has difficulty predicting the rank order of rutile TiO2 grades for the gloss retention of PVDF coatings in Florida, as well as the magnitude and direction of color fade from organic pigment degradation in organic pigment/inorganic pigment blends. One open question that remains is whether the ASTM D7869 cycle might have some utility for industry standard or specification purposes, if the test is limited to specific reference colors or more ideally to specific reference pigments. Note de contenu : - Experimental
- Evaluation of ASTM D7869-13 for PVDF coatings with weatherable inorganic pigments
- Evaluation of ASTM D7869-13 for PVDF coatings with TiO2
- Evaluation of ASTM D7869-13 for PVDF coatings with organic pigmentsDOI : 10.1007/s11998-017-0050-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0050-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31118
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Code-barres Cote Support Localisation Section Disponibilité 20232 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the atmospheric corrosion resistance of AISI A-36 steel painted with coatings based on epoxy and poly(urethane) resins using semi-accelerated testing / E. M. Oliveira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 2 (06/2009)
[article]
Titre : Evaluation of the atmospheric corrosion resistance of AISI A-36 steel painted with coatings based on epoxy and poly(urethane) resins using semi-accelerated testing Type de document : texte imprimé Auteurs : E. M. Oliveira, Auteur ; J. R. G. Carneiro, Auteur ; V. F. Cunha Lins, Auteur Année de publication : 2009 Article en page(s) : p. 213-219 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Corrosion
Epoxydes
Essais accélérés (technologie)
Métaux -- Revêtements protecteurs
Polyuréthanes
Revêtements
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : The influence of temperature, humidity, salinity, and the number of wet-dry cycles in the atmospheric corrosion resistance of the AISI A-36 steel, painted with coatings based on epoxy and poly(urethane) resins was studied. The aim of this work is to present an alternative to the accelerated and field tests developing a semi-accelerated test for evaluating the resistance and durability of a protection system that is applied to a specific environment for one year. The samples were exposed in a corrosion cyclic test chamber for 2000 h with fixed parameters of temperature, relative moisture of air, salinity, and a number of dry-wet cycles. Mass loss of substrate in the scratch area was measured after each 250 h of testing. The second stage of research was the sensibility analysis of the corrosion rate with the change of the reference test parameters. The third stage was the testing of the samples using the cyclic test for 750 h, and the transfer of samples to a marine atmosphere exposure for one year. The mass loss was measured after each 60-day period of testing. Material characterization involved scanning electron microscopy, X-ray diffraction, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, and X-ray fluorescence spectroscopy. After polynomial adjustment of the mass loss function associated with the sensibility analysis of the parameter alteration, the estimated life span of the samples ranged from 30 to 38 months. DOI : 10.1007/s11998-008-9135-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9135-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5606
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 2 (06/2009) . - p. 213-219[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011361 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the weathering resistance of waterborne acrylic- and alkyd-based coatings containing HALS, UV absorber, and bark extracts on wood surfaces / Özlem Özgenç in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
[article]
Titre : Evaluation of the weathering resistance of waterborne acrylic- and alkyd-based coatings containing HALS, UV absorber, and bark extracts on wood surfaces Type de document : texte imprimé Auteurs : Özlem Özgenç, Auteur ; Sefa Durmaz, Auteur ; Selin Sahin, Auteur ; Ismail H. Boyaci, Auteur Année de publication : 2020 Article en page(s) : p. 461-475 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Antioxydants
Chimie analytique
Colorimétrie
Ecorces
Essais accélérés (technologie)
Extraction (chimie)
Polyacryliques
Polyalkydes
Polyphénols
Revêtements en phase aqueuse
Rugosité
StatistiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, tree bark extracts were assessed as functional additives to provide protection in waterborne acrylic- and alkyd-based coatings. Tree bark extracts acted as natural photostabilizers and inhibited UV degradation with high UV absorption capacity. The coating systems comprising bark extracts were compared to the control coating groups comprising ultraviolet light absorbers (UVA) of the hydroxyphenyl-s-triazine (HPT) for acrylic and nonbasic amino ether (NOR) hindered amine light stabilizers (HALS) for alkyd. Scots pine surfaces coated with acrylic and alkyd coatings were exposed to artificial weathering for 2016 h. Three different trees (maritime pine, alder and Calabrian pine) with high antioxidant activity and phenol content were used for this purpose. The chemical structure of acrylic and alkyd coating systems was also examined using ATR–FTIR spectroscopy. The weathering resistance of coating systems containing extracts was evaluated in terms of their color changes and surface roughness through macroscopic evaluation, and they were compared to commercial UV absorber. The lowest color change was observed in the alkyd-based coatings with the bark extract. For the alkyd coatings, the color change (∆E) in the control samples was 24.85, whereas it was found to be 4.68, 5.92 and 7.80 in the test samples containing Calabrian pine, maritime pine and alder bark, respectively. However, color stabilization of the acrylic coatings with UV absorber was found to be much better than the acrylic coatings with extracts. The alkyd coating systems with extracts did not exhibit the same performance for surface roughness. The alkyd coating with the UV absorber provided a smoother surface than that with bark extracts. The acrylic coatings with alder and maritime extracts provided the best results. Acrylic coating may be compatible with (Calabrian) bark extracts. According to the obtained results, it was seen that tree bark extracts in wood coating systems have a potential to substitute commercial UV absorbers as a natural product. Note de contenu : - EXPERIMENTAL : Wood and bark samples - Bark extraction and coating system process - Total polyphenols analysis, antioxidant activity, and UV-Vis spectroscopy - Application and preparation of coating systems - Chemical analysis of coating systems - Artificial weathering test - Color measurement - Surface roughness measurement and macroscopic evaluations - Statistical analysis
- RESULTS AND DISCUSSION : Total polyphenols analysis, antioxidant activity, and UV spectroscopy - Chemical characterization of coating systems by using ATR-FTIR spectrometry
- COLOR CHANGE
- SURFACE ROUGHNESS AND MACROSCOPIC EVALUATIONSDOI : https://doi.org/10.1007/s11998-019-00293-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00293-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33996
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