Accueil
Résultat de la recherche
2 résultat(s) recherche sur le tag 'prediction''
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche
Bring back the steel ? The growth of plastics in automotive applications / Rose Ann Ryntz in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)
[article]
Titre : Bring back the steel ? The growth of plastics in automotive applications Type de document : texte imprimé Auteurs : Rose Ann Ryntz, Auteur Année de publication : 2006 Article en page(s) : p. 3-14 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Flow agents' 'Dynamic mechanical properties' Fluorescence Hardness 'Scratch resistance' 'UV spectroscopy' Photodegradation Polyacrylics Isocyanates 'Melamine-formaldehyde resins' Photostabilizers Polyurethanes Solventborne 'UV, EB radiation cure' Waterborne 'Service life prediction' Weatherability Automotive-OEM High-solids Latex PARP Index. décimale : 667.9 Revêtements et enduits Résumé : The development of plastics has evolved from the use of natural materials to the use of chemically modified natural materials and, finally, to completely man-made molecules. Plastics continue to improve, to afford flexibility, high-impact, and strength. In automotive applications, plastics have increased in utilization to comprise approximately 10% of the total vehicle weight. They offer increased ductility, freedom from corrosion, and increased styling capability. Although plastics have had a remarkable impact on our culture, it is obvious that there is a price to be paid for their use. Plastics are almost too good, as they are durable when processed correctly, but easily damaged when utilized in the incorrect application. Plastics also degrade very slowly, making recycling mandatory. And finally, while plastics consume only 4% of the world's oil production (petroleum is the raw material that is chemically altered to form commercial plastics), their cost hinges on the cost of petroleum. As petroleum prices increase, so too will the cost of plastic. In 2004, the higher price of plastic forced many plastic manufacturers out of business, and forced many automotive suppliers to look into alternative replacements. With publications such as USA Today reporting that current oil reserves will only last 40 years, scientists continue to seek cheaper alternatives to plastic. This article summarizes the history of commercial plastic development, with a focus on utilization of the materials in automotive applications. Damage criteria of plastic components, namely scratch, oxidative degradation, and impact, are discussed in relation to coatings and processing robustness. Environmental regulations, particularly in relation to recycling mandates, are explained. And finally, trends in alternative material development, including bioplastics, films, ceramic coatings, and nano-composites, are formulated. DOI : 10.1007/s11998-006-0002-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0002-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3708
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 3, N° 1 (01/2006) . - p. 3-14[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 003762 - Périodique Bibliothèque principale Documentaires Disponible Model-free estimation of outdoor performance of a model epoxy coating system using accelerated test laboratory data / Brian Dickens in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 4 (12/2009)
[article]
Titre : Model-free estimation of outdoor performance of a model epoxy coating system using accelerated test laboratory data Type de document : texte imprimé Auteurs : Brian Dickens, Auteur Année de publication : 2009 Article en page(s) : p. 419-428 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Epoxy coating' 'Accelerated service life test' 'Model-free exposure prediction' 'Computerized estimation procedure' 'NIST SPHERE' computer life' Index. décimale : 667.9 Revêtements et enduits Résumé : Laboratory and field exposure results for thin transparent films of a model epoxy coating system have been successfully linked using both dosage and dose, assuming only that the additivity law and the reciprocity law are valid. This paper describes the technique used in the linkage step. Laboratory exposures were carried out on the National Institute of Standards and Technology (NIST) Simulated Photodegradation by High Energy Radiant Exposures (SPHERE) using a factorial design of four temperatures, four relative humidities, four ultraviolet-visible ranges, and four neutral density filters. Similar specimens were exposed on the roof of a NIST laboratory in Gaithersburg, MD. The temperature and relative humidity of the outdoor exposures and the solar spectrum were used to characterize the roof environment at 12 min intervals. Chemical degradation of all specimens was followed by transmission Fourier Transform Infrared (FTIR) spectra. Dose, the radiation incident on the specimens, was estimated from lamp and filter spectra for the SPHERE exposures and from the solar spectra for outdoor exposures. Specimen UV–visible absorbance spectra were used with the estimates of dose to give estimates of dosage—the energy absorbed by the specimens. Using filter ranges for the SPHERE data allowed estimation of relative degradation efficiency over the range of the solar spectrum. This was used implicitly by the computer program to estimate the degradation in specimens exposed outdoors. The paper describes a model-free heuristic approach that automatically predicts chemical degradation outdoors using the outdoor environment parameters and the SPHERE laboratory data. That both dose and dosage are equally valid methods of successfully predicting outdoor degradation may be a consequence of all the films being approximately the same thickness (about 6 µm). DOI : 10.1007/s11998-009-9169-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9169-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7686
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 6, N° 4 (12/2009) . - p. 419-428[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 011845 - Périodique Bibliothèque principale Documentaires Disponible