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[article]
Titre : Sticking lightly : Rad-cured silicone release coatings show promise as a solution to the industry trend of converting to thermally sensitive filmic substrates for PSAs Type de document : texte imprimé Auteurs : G. V. Gordon, Auteur ; P. A. Moore, Auteur ; P. J. Popa, Auteur ; J. S. Tonge, Auteur ; G. A. Vincent, Auteur Année de publication : 2002 Article en page(s) : p. 24-31 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs sensibles à la pression
Copolymère silicone époxy
Energie de surface
Réticulants
Revêtements anti-adhésion -- Séchage sous rayonnement ultraviolet
Rhéologie
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).Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Radiation-cured silicone release coatings appear to be an ideal solution to the industry trend of converting to thermally sensitive filmic substrates for PSA constructions. The polarity and concentration of organic curing groups necessary to affect high-speed cure of the silicone release coatings results in a family of materials much more rigid-but with the same range of surface energies-compared to their thermally cured solventless counterparts. Despite the structural limitations detailed in this article, UV-cured release coatings have found utility in the coating of filmic substrates, and release modification can be efficiently controlled using a high-release additive.
The epoxy-cured silicone systems control the magnitude of release force in the same manner as their thermally cured equivalents, that is, via the viscoelastic, not surface, properties of the silicone matrix.Note de contenu : - Evolution to Rad-cured Systems
- Release Force Understanding
- Release Force Profiles
- Surface Energy
- Rheological Properties
- Work in ProgressEn ligne : https://drive.google.com/file/d/1Y6QxbgARlNSTntIFhSyen90BedeuW9aI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20013
in ADHESIVES AGE > Vol. 45, N° 7 (07/2002) . - p. 24-31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001473 - Périodique Bibliothèque principale Documentaires Disponible Structural organisations in polystyrene-based semifluorinated block copolymers for low surface energy coatings / G. Galli in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
[article]
Titre : Structural organisations in polystyrene-based semifluorinated block copolymers for low surface energy coatings Type de document : texte imprimé Auteurs : G. Galli, Auteur ; E. J. Kramer ; A. Hexemer, Auteur ; C. K. Ober, Auteur ; X. Li, Auteur ; E. Chiellini, Auteur ; L. Andruzzi, Auteur Année de publication : 2004 Article en page(s) : p. 77-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymères séquencés
Cristaux liquides
Energie de surface
Enrobage (technologie)
Fluoropolymères
Morphologie (matériaux)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : New narrow-polydispersity AB block copolymers were prepared by 2,2,6,6-tetramethylpiperidin-1-yloxy (TEMPO)-mediated, controlled radical polymerisation. The A block was a poly(styrene) block, and the B block was a semifluorinated block, using either a poly(styrene) or a polyacrylate backbone. The semifluorinated side segments self-assembled into smectic mesophases. The bulk morphology and the interplay between microphase separation and liquid crystalline order were examined using transmission electron microscopy (TEM) and x-ray scattering. Near-edge x-ray absorption fine structure (NEXAFS) studies revealed that the semifluorinated side groups were ordered and titled at the outer surface of polymer films and allowed evaluation of the orientational order parameters. The orientational order parameter of the C-F bonds of the semifluorinated side groups at the surface was correlated with the critical surface tension of the polymer that had been extrapolated from Zisman plots with n-alkanes as the interrogating liquids. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Characterisation
- RESULTS AND DISCUSSION : Synthesis - Mesophase behaviour - Bulk morphology
- Table 1 : Physico-chemical data and mesophase properties of the block copolymers studied
- Table 2 : Examples of morphologies of fluorinated block copolymers by TEM and SAXS
- Table 3 : Surface orientational order parameters of block copolymers by NEXAFSDOI : 10.1007/BF02699600 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699600.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5466
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B2 (06/2004) . - p. 77-82[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000391 - Périodique Bibliothèque principale Documentaires Disponible Structure of vinyl polysiloxane on properties of polyacrylates filmm and its pigment printing application / Qipeng Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
[article]
Titre : Structure of vinyl polysiloxane on properties of polyacrylates filmm and its pigment printing application Type de document : texte imprimé Auteurs : Qipeng Zhang, Auteur ; Minghua Wu, Auteur Année de publication : 2020 Article en page(s) : p. 937-948 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Caractérisation
Copolymères -- Synthèse
Copolymères greffés
Couches minces -- Propriétés mécaniques
Energie de surface
Impression pigmentaire
Impression sur étoffes
Latex
Liants
Mesure
Poids moléculaires
Polyacrylates
Polymérisation en émulsion
Polyméthylvinylsiloxane
Séparation (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : Polysiloxane is a promising modified material due to its good hydrophobicity and toughness, but it suffers from serious uneven distribution and migration during film formation process which gradually lead to the destruction of the hydrophobic structure. A novel silicon-modified copolymer with different molecular weight and vinyl content was synthesized to overcome this problem: an appropriate amount of double bonds between the polysiloxane backbone ensures uniform distribution. Moreover, a multicrosslinked network binder was prepared by miniemulsion polymerization of the polyacrylate copolymers and polysiloxane. Unlike the common crosslinked network of an uneven distribution and migration of silicone backbone, the polysiloxane with suitable crosslinking degree and molecular weight could be effectively distributed evenly during the film formation process. As a result, a better hydrophobicity and toughness performance (89.7° ± 0.5°, 2500% elongation at break) was achieved with this novel poly(methylvinylsiloxane) with 11,024 g/mol at 0.804 mmol/g vinyl content. The product was applied to pigment printing with better wet rubbing fastness and soft handle compared with the unmodified polyacrylates binder. The DSC, SAXS, and XPS indicated that high molecular organosilicon chain and moderate vinyl content were prone to phase separation and obviously shifted onto the surface of film, enriching a uniform organosilicon layer, which played a vital role in the surface hydrophobicity and mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of poly(methylvinylsiloxane - Polymerization - Pigment printing - Measurements
- RESULTS AND DISCUSSION : Synthesis and structure of poly(methylvinylsiloxane) - Characterization of different latexes - Characterization of modified polyacrylate films - Degree of grafting of Vi-PDMS to polyacrylates - Microphase separation - Surface composition - Contact angles and surface energy - Mechanical properties of the films - Textile pigment printing applicationsDOI : https://doi.org/10.1007/s11998-020-00320-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00320-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34382
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 937-948[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21864 - Périodique Bibliothèque principale Documentaires Disponible Surface properties and printability of polypropylene film treated by an air dielectric barrier discharge plasma / F. A. Morsy in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)
[article]
Titre : Surface properties and printability of polypropylene film treated by an air dielectric barrier discharge plasma Type de document : texte imprimé Auteurs : F. A. Morsy, Auteur ; S. Y. Elsayad, Auteur ; A. Bakry, Auteur ; M. A. Eid, Auteur Année de publication : 2006 Article en page(s) : p. 49-55 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Caractérisation
Couches minces
Diélectriques
Energie de surface
Films plastiques
Impression sur matières plastiques
Polypropylène
Technique des plasmasIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of air dielectric barrier discharge plasma treatment on the chemical structure and morphology of polypropylene (PP) film was studied using UV-VIS (ultraviolet-visible), FT-IR, (Fourier transform infrared), SEM (scanning electron microscopy) and AFM (atomic force microscopy). Polypropylene samples were printed using solvent-based gravure ink. An evaluation of the print quality criteria of the treated PP films included measurement of print density and print gloss. SEM investigated the ink laydown on the modified PP film. The results showed that after a few seconds of plasma treatment, both the surface energy and the surface roughness of the treated PP film increased. There was an increase in the absorbance at the almost-visible range, and C=C and C=O bands were found after the air discharge plasma treatment. A short plasma treatment of 15 seconds was found to bring about a dramatic increase in the print density readings, but a decrease in print gloss. The time of the air discharge plasma treatment was found to have no effect on the print density or print gloss at a high ink film thickness. The results showed that air dielectric barrier discharge plasma treatment, for a few seconds, is effective in printing and is economical for industrial use (this will be studied in detail in future work). Note de contenu : - EXPERIMENTAL : Plasma treatment of PP film - Surface characterisation - Printing of PP films - Print evaluation
- RESULTS AND DISCUSSION : Surface characterisation results - Print evaluation results
- Table 1 : Ink formulaDOI : 10.1007/BF02699614 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699614.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5395
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B1 (03/2006) . - p. 49-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003916 - Périodique Bibliothèque principale Documentaires Disponible
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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 treatment with atmospheric plasma / Nicolas Vandencasteele in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 27, N° 1 (01/2020)
PermalinkThe characterisation of surface area and surface heterogeneity profiles of hair by inverse gas chromatography / Frank Thielmann in IFSCC MAGAZINE, Vol. 5, N° 3 (07-08-09/2002)
PermalinkTowards gradient structures in fluorinated acrylate and polyacrylate blend emulsions / Zhaoxia Yin in SURFACE COATINGS INTERNATIONAL, Vol. 101.4 (08-09/2018)
PermalinkUnder high dynamic load / Eduard Kraus in ADHESION - ADHESIVES + SEALANTS, Vol. 13, N° 2/2016 (2016)
PermalinkUV-curable waterborne epoxy acrylate coating modified by monomethacryloyloxy-terminated fluorinated oligomer / Hongyi Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)
PermalinkUV-pre-treatment for polycarbonate for bonding LSR in a multi-component injection molding process / Christof Ulrich Schlitt in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)
PermalinkWaterborne epoxy resins modified by reactive polyacrylate modifier with fluorinated side chains / Hongyi Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
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