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A macroscopically nondestructive method for characterizing surface mechanical properties of polymeric coatings under accelerated weathering / Ching-Hsuan Chang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)

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inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 913-922

Titre :	A macroscopically nondestructive method for characterizing surface mechanical properties of polymeric coatings under accelerated weathering
Type de document :	texte imprimé
Auteurs :	Ching-Hsuan Chang, Auteur ; Chun-Chieh Tien, Auteur ; Hsiang-Chun Hsueh ; Lipiin Sung
Année de publication :	2018
Article en page(s) :	p. 913-922
Note générale :	Bibliogr.
Langues :	Américain (ame)
Catégories :	Contrôle non destructif Essais dynamiques Indentation des matériaux Mesure Microscopie confocale à balayage laser Morphologie (matériaux) Nanoindentation Polyuréthanes Rayures Résistance à l'abrasion Résistance au rayonnement ultraviolet Revêtements -- Propriétés mécaniques Surfaces (technologie) Surfaces -- Analyse
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The surface of coatings and plastics is the first target in any degradation process initiated by ultraviolet (UV) radiation or mechanical stress (via scratch and abrasion). Surface damage can lead to changes in optical, morphological, and mechanical properties and can result in pathways for ingress of moisture and corrosive agents. Current test methods for monitoring performance of protective coatings focus on chemical properties and optical properties, such as color and gloss measurements, or invasive tests such as abrasion and cross-cut adhesion. In this study, a macroscopically nondestructive performance protocol using nanoindentation metrology via a well-controlled scratch test was applied to evaluate the scratch resistance and monitor the surface mechanical property changes in a protective coating under accelerated weathering. Polyurethane (PU) coatings with different polyol compositions were chosen for this study. Coating specimens were exposed to high-intensity UV radiation at 55°C and 75% RH conditions. Exposed specimens were removed at specified UV exposure times for surface modulus/hardness and scratch resistance characterization via nanoindentation and scratch test. The effect of polyol type and UV radiation dose on the scratch damage (scratch morphology) was investigated and correlated with the surface hardness and modulus of the materials.
Note de contenu :	- EXPERIMENTAL : Materials - UV exposure measurements - Polymer interface consortium scratch test protocol (PICSTP) - Suface mechanical measurements and scratch testing - Scratch morphology characterization - RESULTS AND DISCUSSION : Effect of polyol type - Effect of UV radiation
DOI :	10.1007/s11998-017-0042-3
En ligne :	https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0042-3.pdf
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31116

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