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Stress development and film formation in multiphase composite latexes / Kyle Price in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
[article]
Titre : Stress development and film formation in multiphase composite latexes Type de document : texte imprimé Auteurs : Kyle Price, Auteur ; Wenjun Wu, Auteur ; Kurt Wood, Auteur ; Stephanie Kong, Auteur ; Alon McCormick, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2014 Article en page(s) : p. 827-839 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des données
Caractérisation
Composites
Core-Shell
Cryotechnique
Evaluation
Formation de film
Latex
Liants
Microscopie électronique à balayage
Morphologie (matériaux)
Particules -- Morphologie
Revêtement -- Séchage:Peinture -- SéchageIndex. décimale : 667.9 Revêtements et enduits Résumé : Designed appropriately, multiphase soft-core/hard-shell latex particles can achieve film formation without the addition of a coalescing aid, while preserving sufficient film hardness. Achieving optimal performance in these materials requires an under-standing of how particle morphology affects film formation and stress development in the film. In this study, soft-core/hard-shell latex particles with different shell ratios, core and shell glass transition temperatures(Tgs), and particle sizes (63–177 nm) were synthesized using a two-stage emulsion polymerization. The film formation behavior of the composite particles was investigated with cryogenic scanning electron micro-scopy, atomic force microscopy, and measurements of the minimum film formation temperature (MFFT). Results show that film formation was enhanced for particles with thinner hard shells, smaller particle size, and a smaller difference in Tg between the core and shell polymers. For example, the MFFT decreased and the particle deformation increased for particles with thinner shells and smaller article sizes. Stress development during drying was characterized using a cantilever beam bending technique. A walled cantilever design was used to monitor stress development without the complication of a lateral drying front. The film formation behavior and stress development correlated well with practical paint properties like scrub resistance and gloss. Note de contenu : - EXPERIMENTAL : Binder evaluation - Paint evaluation - Block resistance - Scrub resistance - Data analysis using JMP - Stress measurement - Characterization methods
- RESULTS AND DISCUSSION : Particle morphology - Film formation - Stress development - Paint performanceDOI : 10.1007/s11998-014-9606-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9606-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22307
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 827-839[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16659 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of fluorine-containing poly-styrene-acrylate latex with core–shell structure using a reactive surfactant / Guilong Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 3 (05/2011)
[article]
Titre : Synthesis and characterization of fluorine-containing poly-styrene-acrylate latex with core–shell structure using a reactive surfactant Type de document : texte imprimé Auteurs : Guilong Xu, Auteur ; Lili Deng, Auteur ; Wen Xiufang, Auteur ; Pi Pihui, Auteur ; Dafeng Zheng, Auteur ; Jiang Cheng, Auteur ; Yang Zhuoru, Auteur Année de publication : 2011 Article en page(s) : p. 401-407 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Copolymère styrène acrylique
Core-Shell
Fluorine
Latex
Surfactants réactifsIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluorine-containing poly-styrene-acrylate (PSA) latex with core–shell structure was successfully synthesized by seeded semicontinuous emulsion polymerization using fluorine monomer Actyflon-G04 and reactive emulsifier DNS-86. The chemical composition, morphology of latex, and surface composition of the latex film were characterized by Fourier transform infrared spectra, transmission electron microscopy, and X-ray photoelectron spectroscopy, respectively. The stability properties of latex were tested by Ca2+, centrifugal and mechanical stability tests, and the latex film was studied by water contact angle, water absorption ratio, and thermo-gravimetric analysis. The results show that fluorine-containing PSA latex particles with crosslinked core and crosslinked shell structure have excellent stability properties, and the film of latex has excellent water repellency, thermal stability, and chemical resistance properties when the amount of fluorine monomer was only 8.0 wt %. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of the fluorine-containing PSA latex latex nanoparticles with core-shell structure - Characterization.
- RESULTS AND DISCUSSION : FTIR analysis - Effect of crosslinking - Micromorphology of the core-shell latex nanoparticles - XPS analysis - Stability of the prepared latex - Water repellency and chemical resistance properties of the latex film - Thermal stability of the prepared latex film.DOI : 10.1007/s11998-010-9308-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9308-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11679
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 3 (05/2011) . - p. 401-407[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012971 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of large particle size self-matting core-shell acrylic resin / Hao Peng in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 9 (09/2022)
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Titre : Synthesis and characterization of large particle size self-matting core-shell acrylic resin Type de document : texte imprimé Auteurs : Hao Peng, Auteur ; Huan Wei, Auteur ; Jun Xiang, Auteur ; Haojun Fun, Auteur Année de publication : 2022 Article en page(s) : p. 379-390 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant
Caractérisation
Core-Shell
Essais (technologie)
Polyacrylate de butyle
Polyacryliques
Polymères -- Synthèse
Polymérisation en émulsion
Revêtements organiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Acrylic resin plays an important role in leather-making, such as finishing agent, filler and tanning agent. Acrylic resin can be easily fabricated via conventional emulsion polymerization, but how to prepare large particle size with self-matting effect has always been a challenge. In this paper, a continuous three-stage polymerization method: seed-polymerization coupled core-polymerization and shell polymerization was employed to prepare large particle size self-matting acrylic resin emulsion. Simultaneously, the effect of feeding methods on particles size and the effects of latex particle size, shell structure and cross-linking degree on the morphology and gloss of coating were investigated. The Z-average size of PBA seed latex particles was 213.4 nm for semi-continuous feeding method but 82.3nm for batch feeding method. After three-time continuous growth, the seed emulsion turned into core emulsion, and the particle size of core latex reached about 700nm. In third stages ofshell polymerization, the core emulsion was changed into core-shell emulsion, and the latex particle size increased further to 804nm. The latex particle size, core-shell structure and cross-linking degree of shell layer were found to influence the gloss of the coating. Large latex particle size imparted the film spherical micro-rough surface, soft-core combined with hard-shell structure led to deformation resistant during film formation and cross-linking of shell layer increased the densification of shell layer, all contributed to the coating rough surface, as a result, increasing the matting effect of the coating. Finally, the leather gloss was reduced from 5.8° to 1.2°. Note de contenu : - EXPERIMENT : Raw materials - Preparation of acrylic resin emulsion - Preparation of PBA seed emulsion - Preparation of PBA core growth emulsion - Preparation of P(BA-MMA/AN) core-shell emulsion - Preparation of leather coating
- CHARACTERIZATION : Coating gloss test - Measurement of latex particle size distribution - Characterization of surface morphology and roughness - Characterization of glass transition temperature
- RESULTS AND DISCUSSION : Effect of feeding mode on particle size of seed emulsion - Growth of core latex particle size - Effet of hardness of shell polymer on the surface morphology of coating - Effect of cross-linking on the surface morphology and gloss of the coating
- Table 1 : Recipes for the preparation of PBA seed latexes
- Table 2 : Recipes for the preparation of PBA core latexes
- Table 3 : Recipes for the preparation of P(BA-MMA/AN) core-shell latexes
- Table 4 : Diameter and number density of PBA seed latex particles at termination stage of polymerization
- Table 5 : Variation of diameter and number density of PBA after growth
- Table 6 : The number of PBA particles at initiation and termination stage of polymerization
- Table 7 : Glass transition temperature and gloss of films with soft shell and hard shell
- Table 8 : Coating roughness, theroetical ight reflectivity and gloss with different acrylic resin coatingDOI : https://doi.org/10.34314/jalca.v117i9.6168 En ligne : https://drive.google.com/file/d/1msWSAo-uopmw_m_e7iSiVOsAYNkZalmh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38077
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVII, N° 9 (09/2022) . - p. 379-390[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23609 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of local clay–titanium dioxide core–shell extender pigments / C. M. Ewulonu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
[article]
Titre : Synthesis and characterization of local clay–titanium dioxide core–shell extender pigments Type de document : texte imprimé Auteurs : C. M. Ewulonu, Auteur ; I. O. Igwe, Auteur ; G. N. Onyeagoro, Auteur Année de publication : 2016 Article en page(s) : p. 931-940 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Charges (matériaux)
Core-Shell
Dioxyde de titane
Kaolin
Pigments -- SynthèseIndex. décimale : 667.9 Revêtements et enduits Résumé : A simple chemical technique has been used to prepare core–shell extender pigments based on Nigerian indigenous clays as core and titanium dioxide as shell. The prepared core–shell extender pigments were characterized using X-ray fluorescence and scanning electron microscopy. The physico-chemical properties of these extender pigments were also evaluated according to ASTM measurements. The study showed that the prepared core–shell pigments were nontoxic and environmentally friendly. They are of low cost and can be incorporated in semi-gloss paints, paper, rubber, and plastic composites without much effect on the volume. The characteristics of these pigments showed that they combine the properties of both their precursors, and have the potential to overcome their disadvantages, e.g., low hiding power of clays and photochemical activity of titanium dioxide. Note de contenu : - MATERIALS AND METHODS : Materials - Particle size analysis - Preparation of core-shell extender pigments - Characterization of prepared extender pigments
- RESULTS AND DISCUSSION : Pigment chemical composition and morphology - Extender propertiesDOI : 10.1007/s11998-016-9786-4 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9786-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27132
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 931-940[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18316 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of nitrogen heterocycle-functionalized core-shell hyperbranched polyester / Subramanian Karpagam in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)
[article]
Titre : Synthesis and properties of nitrogen heterocycle-functionalized core-shell hyperbranched polyester Type de document : texte imprimé Auteurs : Subramanian Karpagam, Auteur ; S. Guhanathan, Auteur Année de publication : 2015 Article en page(s) : p. 233-242 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Analyse thermique
Azote
Calorimétrie
Caractérisation
Composés hétérocycliques
Core-Shell
Diélectriques
Poids moléculaires
Polyesters
Polymères -- Propriétés électriques
Polymères -- Propriétés thermiques
Polymères -- Synthèse
Polymères ramifiés
Résonance magnétique nucléaire
ThermogravimétrieIndex. décimale : 668.4 Plastiques, vinyles Résumé : Core-shell hyperbranched polyesters (HBPE) of third generation prepared from 2,2?-bis (hydroxymethyl) propionic acid (Bis-MPA) as an ABx monomer and N-heterocyclic (indole, piperidine and piperazine) phosphoryl dichloride as a core molecule by melt condensation process. These polymers were characterized by FT-IR, 1H NMR, 13C NMR, 31P NMR, elemental analysis, and MALDI spectroscopy. The thermal behavior of the polymers has been investigated by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC). There is no weight loss observed until 250 °C under nitrogen atmosphere. DSC showed that the glass transition temperatures was about ?14 and ?30 °C for the prepared core-shell HBPE. The dielectric properties such as dielectric constant and loss factor for these polyesters were also studied with respect to change of frequency (50 Hz to 5 MHz). Note de contenu : - EXPERIMENTAL : Materials - Methods - Measurements of dielectric properties - Synthesis of N-heterocyclic phosphoryl dichloride - Synthesis of phosphorous containing third generation (G3) of N-heterocyclic hyperbranched polyester (HBPE)
- RESULTS AND DISCUSSION : Synthesis of hyperbranched polyesters - Characterization of hyperbranched polyesters - Degree of branching - Molecular weight and molecular weight distribution - Electrical properties - Thermal propertiesDOI : 10.3139/217.2990 En ligne : https://drive.google.com/file/d/1di8F6zbcE4a7EKMS620xoEVRSJ-DM_m2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23905
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Code-barres Cote Support Localisation Section Disponibilité 17180 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of core–shell-type styrene acrylic latexes with low NMA content and their application in pigment printing pastes / Mesut Eren in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
PermalinkSynthesis of a low-temperature self-crosslinking polyacrylate binder with a core-shell structure and its application in textile pigment printing / Xiaoyu Zhang in COLORATION TECHNOLOGY, Vol. 134, N° 4 (08/2018)
PermalinkWaterborne : a different animal, part 2 / Clifford K. Schoff in COATINGS TECH, Vol. 10, N° 2 (02/2013)
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