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Titre : Surface properties of polymers Type de document : texte imprimé Auteurs : Tipanna Melkeri, Auteur Année de publication : 2020 Article en page(s) : p. 93-99 Langues : Anglais (eng) Catégories : Angle de contact
Energie de surface
Polymères -- Surfaces
Rugosité
Tension superficielleIndex. décimale : 668.9 Polymères Résumé : The surface energy, surface tension and contact angle of the polymers are related to surface properties of polymers. Surface properties are important in many applications of polymer as paint, inks and adhesives. Surface tension is the tendency of fluid surfaces to shrink into the minimum surface area possible. Surface tension is an important factor in the phenomenon of capillarity. Capiilary rise method and Stallagmometer method - drop weight method are widely used methods for measuring surface tension. The contact angle is the angle, conventionally measured through the liquid, where a liquid-vapor interface meets a solid surface. If 0 = 0 °, the liquid completely wets the substrate. If ° < 0 < 90 °, high wetting occurs. If 90 ° < 9 < 180°, low wetting occurs and If 0 = 180 °, the liquid does not wet the substrate at all. Surface roughness has a strong effect on the contact angle and wettabiIity of a surface. The surface energy may therefore be defined as the excess energy at the surface of a material compared to the buIk, or it is the work required to buiId an area of a particular surface. Another way to view the surface energy is to relate it to the work required to cut a bulk sample, creating two surfaces. Surface energy comes into play in wetting phenomena. The spreading parameter "S" can be used to nnathematically determine this. If S < 0, the liquid partially wets the substrate. If S > 0, the liquid completely wets the substrate. Surface energy of solid polymer is determined by using Zisman theory and the Owens/Wendt theory. Note de contenu : - SURFACE PROPERTIES
- SURFACE TENSION : In terms of force - In terms of energy
- METHODS OF SURFACE TENSION MEASUREMENTS : Capillary rise method - Drop volume method -stalagmometric method
- CONTACT ANGLE
- EFFECT OF ROUGHNESS TO CONTACT ANGLES
- DYNAMIC CONTACT ANGLES
- DETERMINATION OF CONTACT ANGLE : The static sessile drop method - Advantages and disadvantages - The pendant drop method - The dynamic sessile drop method - Dynamic Wilhelmy method - Advantages and disadvantages
- SURFACE FREE ENERGY
- SPREADING PARAMETER
- DETERMINATION OF SURFACE ENERGY : Based on the Zisman theory
- THE OWENS/WENDT THEORY
- Table : Surface energy and contact angle of the few commercial polymersEn ligne : https://drive.google.com/file/d/1w1fuu3OMnTXt7BH-CbrWjRRhW2YjCq2X/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34656
in PAINTINDIA > Vol. LXX, N° 3 (03/2020) . - p. 93-99[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22358 - Périodique Bibliothèque principale Documentaires Disponible Surface roughness measurements after hand-finishing of uneven GFRP surfaces / Masashi Sato in JEC COMPOSITES MAGAZINE, N° 139 (03-04/2021)
[article]
Titre : Surface roughness measurements after hand-finishing of uneven GFRP surfaces Type de document : texte imprimé Auteurs : Masashi Sato, Auteur Année de publication : 2021 Article en page(s) : p. 56-58 Langues : Anglais (eng) Catégories : Composites à fibres de verre
Mesure
Rugosité
Surfaces (Physique)
Surfaces -- AnalyseIndex. décimale : 668.4 Plastiques, vinyles Résumé : FRP Kaji Co. Ltd. reports their hand-finishing condition of surface roughness and geometric dimension about GFRP (Glass Fiber Reinforced Plastics) by quantitative evaluation. Note de contenu : - Ojective
- Result summary : Preparation of the GFRP evaluation samples - Surface roughness measurement - Surface profile measurement
- Fig. 1 : Surface roughness measurement
- Fig. 2 : Profile measurement using a CMM
- Fig. 3 : Photograph of the evaluation samples
- Fig. 4 : Surface roughness comparison table
- Fig. 5 : Typical profile curves (open surface, hand finishing and mould forming)
- Fig. 6 : Surface profile measurement results : Surface samples, A, B, C? ; upper row : X direction and lower row : Y direction
- Table 1 : Surface rougness measurement tablePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35579
in JEC COMPOSITES MAGAZINE > N° 139 (03-04/2021) . - p. 56-58[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22574 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of fully bio-based branched unsaturated polyester oligomers and UV curing coatings / Caixing Feng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
[article]
Titre : Synthesis of fully bio-based branched unsaturated polyester oligomers and UV curing coatings Type de document : texte imprimé Auteurs : Caixing Feng, Auteur ; Haihong Ma, Auteur ; Fengmei Ren, Auteur ; Zhengfa Zhou, Auteur ; Weibing Xu, Auteur Année de publication : 2023 Article en page(s) : p. 1747-1758 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères
Caractérisation
Formulation (Génie chimique)
Oligomères
Polyesters insaturésLes résines de polyesters insaturés (UP) sont obtenues par polycondensation
d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique.
Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs.
Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable.
Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement
dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile.
Polymères -- Synthèse
Polymères ramifiés
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Rugosité
Surfaces -- AnalyseIndex. décimale : 667.9 Revêtements et enduits Résumé : In this paper, fully bio-based branched unsaturated polyester (BUPE) oligomers were synthesized by one-step solvent-free polycondensation using itaconic acid, isosorbide and glycerol as feedstocks. The branched structure was confirmed by Fourier-transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance spectroscopy (1H NMR). The effect of the branched structure on the properties of BUPE UV curing coatings was investigated. The results showed that the introduction of a glycerol branched structure was favorable for UV curing. The BUPE UV curing coatings based on the glycerol branched structure showed higher gel content and crosslink density, which enhanced the hardness, solvent resistance and mechanical properties of the coatings. In addition, the BUPE UV curing coatings possessed extremely low surface roughness, excellent heat resistance and light transmission properties. Note de contenu : - EXPERIMENT : Materials - Synthesis of branched unsaturated polyester (BUPE) oligomers - Preparation of BUPE UV curing coatings - Characterization
- RESULTS AND DISCUSSION : Characterization of BUPE oligomers - Gel content and swelling ratio analysis - Mechanical properties analysis - Surface micromorphology and roughness analysis - Thermal property analysis - Coating performance analysis - Transparency analysis
- Table 1 : Synthesis formula of BUPE oligomers
- Table 2 : Data of BUPE oligomers obtained from 1H NMR, GPC and DSC
- Table 3 : Data sheet of mechanical properties of BUPE UV curing films
- Table 4 : TGA data
- Table 5 : Performances of BUPE UV curing coatings and filmsDOI : https://doi.org/10.1007/s11998-023-00778-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00778-3.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39985
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1747-1758[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24242 - Périodique Bibliothèque principale Documentaires Disponible
[article]
Titre : Tactile perception of coatings : Systematically designed beads and their effect on tactile interaction Type de document : texte imprimé Auteurs : Lisa Skedung, Auteur ; Kathryn L. Harris, Auteur ; Elizabeth S. Collier, Auteur ; Viveca Wallqvist, Auteur ; Anne Kari Nyhus, Auteur ; Lene K. Bjorndal, Auteur Année de publication : 2022 Article en page(s) : p. 16-21 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Billes de polymères
Caractérisation
Formulation (Génie chimique)
Matériaux -- Propriétés fonctionnelles
Procédés de fabrication
Revêtements organiques
Rugosité
ToucherIndex. décimale : 667.9 Revêtements et enduits Résumé : A systematic series of mono-sized polymer beads were devel¬oped by increasing the proportion of hard (high Tg) relative to soft (low Tg) monomer in the range 0-36 % by weight. The beads were evaluated in one stiffer and one more compliant coating formulation (CF) to investigate their effect on tactile interaction. Physical characterisation and perceptual evaluations uncovered complex interactions between the two, indicating that system¬atic manipulation of surfaces can lead to possible future percep¬tion delivery, but that there is no one size fits all solution. Note de contenu : - Bead fabrication
- Coated panel fabrication
- Characterisatiçon of beads and coating properties
- Surface roughness
- Tactile friction and perceptual measurements using naïve participants
- Psychophysical analysis and results
- Attributes
- Roughness differences
- Tactile perception : simply complicated
- Table : Unstandardised regression coefficients and significance levels from multiple linear regressions including 'hard monomer%' as a covariate and 'formulation' as a factor.En ligne : https://drive.google.com/file/d/1ZSt5_OYjVKMi7sn76G9SewNZAKW7oFsH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38351
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2022) . - p. 16-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23710 - Périodique Bibliothèque principale Documentaires Disponible Temporal variations of surface roughness and thickness of polymer-coated quartz sand / Yunesh Saulick in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
[article]
Titre : Temporal variations of surface roughness and thickness of polymer-coated quartz sand Type de document : texte imprimé Auteurs : Yunesh Saulick, Auteur ; Hong-Wei Yang, Auteur ; Sergio D. N. Lourenço, Auteur Année de publication : 2023 Article en page(s) : p. 1795-1800 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Hydrophobie
Interférométrie
Matériaux -- Epaisseur
Mesure
Particules (matières)
Quartz
Revêtements organiques
Rugosité
Silanes
Surfaces (Physique)Index. décimale : 667.9 Revêtements et enduits Résumé : In this work, the changes in surface roughness and thickness of particles have been investigated after coating with polymers that result in hydrophobicity after a given time period. The study fundamentally investigates the evolution of these surface properties from the instant the particles are coated. Six chemical agents have been used on near-spherical glass beads and the changes in surface profiles monitored. Surface roughness was quantified using the power spectral density method and the surface thickness of the coatings was determined by a new technique which involved calculating the change in the representative radius of asperity. Results showed that the coating process altered the surface roughness and thickness of particles irrespective of chemicals used. The time-dependency of the coating process is illustrated and it was observed that fluctuations in both surface roughness and thickness lessened after a time period of 30 min. Depending on the chemical agent used, either an overall roughening or softening was recorded at 60 min and the values of surface thickness showed increases between 71 and 256 nm. By analyzing the evolution of surface roughness and thickness at the particle level following coating, this study demonstrated the intricate link between surface properties and chemistry in inducing functional properties on particles. Note de contenu : - MATERIALS AND METHODS : Materials - Coating process and surface measurements - Surface roughness - Surface thickness
- RESULTS AND DISCUSSION : Temporal variations of surface roughness - Temporal variations of surface thickness
- Table 1 : Properties of chemical agentsDOI : https://doi.org/10.1007/s11998-023-00798-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00798-z.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39989
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1795-1800[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24242 - Périodique Bibliothèque principale Documentaires Disponible The effects of some engraving and film substrate parameters on the solid density and the dot gain in gravure printing / E. N. Gencoglu in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B1 (03/2005)
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PermalinkThe role of roughness in the adhesion of two 'elastic' bodies - A coatings perspective / D. Hosseinpour in SURFACE COATINGS INTERNATIONAL, Vol. 95, 6 (12/2012)
PermalinkThe roughness of lip skin is related to the ceramide profile in the stratum corneum / Eiko Tamura in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 6 (12/2016)
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