Effect of the particle sizes of silica on the properties of UV-curing matting coatings / Ziyuan Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 183-192 Titre : Effect of the particle sizes of silica on the properties of UV-curing matting coatings Type de document : texte imprimé Auteurs : Ziyuan Yang, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Yanxia Niu, Auteur ; Huafeng Duan, Auteur ; Xiaogang Hao, Auteur Année de publication : 2021 Article en page(s) : p. 183-192 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant Analyse morphologique Caractérisation Copolymère uréthane acrylate Diisocyanate d'isophorone Dioxyde de silicium Oligomères Polyméthacrylate d'hydroxyéthyle Polypropylène glycol Revêtements -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Stabilité thermique Taille des particules Index. décimale : 667.9 Revêtements et enduits Résumé : UV-curable matting composites were prepared by micron silica matting agent, polyether diol (PPG), isophorone diisocyanate (IPDI), and 2-hydroxyethyl methacrylate (HEMA) via the in situ polymerization method. The structure, surface morphology, and thermal stability of the composites were characterized by FTIR, SEM, and TGA, respectively. As the main resin in the UV-curable coating, the effects of particle sizes of silica on the gloss, abrasion resistance, adhesion, and hydrophilic properties of coatings were measured. The results show that the agglomeration phenomenon of the modified silica in the composite coating was obviously improved. The smaller the particle size, the lower the gloss of coatings with the same content. The adhesion strength and abrasion resistance of the composites were superior to those of pure UV-curing coatings without silica. The greater the particle sizes of the added modified silica, the stronger the hydrophilicity of the composite. Note de contenu : - EXPERIMENTAL : Material - Preparation of PUA and PUA/Sio2 oligomer - Preparation of UV-curing matting coating with PUA/Sio2 oligomer - Instrument and characterization - RESULTS AND DISCUSSION : The structure UV-PUA/Sio2 oligomer - The thermal stability of UV-PUA/SiO2 composite films - Effect of particle size of silica on the surface property of UV-cured films - Effec of particle size of silica on the mechanical property of UV-cured films DOI : https://doi.org/10.1007/s11998-020-00395-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00395-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35362 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22605	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Effects of glycidyl methacrylate content and addition sequence on the acrylic latexes with carboxyl groups / Guofeng Qin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 973-980 Titre : Effects of glycidyl methacrylate content and addition sequence on the acrylic latexes with carboxyl groups Type de document : texte imprimé Auteurs : Guofeng Qin, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Jianbing Wu, Auteur ; Tingfa Yi, Auteur ; Ruofei Zhang, Auteur ; Hui Zhang, Auteur ; Xiaogang Hao, Auteur Année de publication : 2016 Article en page(s) : p. 973-980 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes Groupement carboxyle Latex Méthacrylate de glycidyle Polyacryliques Polymères -- Synthèse Polymérisation en émulsion Réticulation (polymérisation) Index. décimale : 667.9 Revêtements et enduits Résumé : Acrylic latexes with epoxy and carboxyl groups have been synthesized via a two-stage emulsion polymerization process. Different contents of glycidyl methacrylate (GMA) were introduced by three addition modes to copolymerize with methyl methacrylate, butyl acrylate, acrylic acid (AA) in the presence of K2S2O8. To obtain stable latexes, NaHCO3 was employed as a buffer to compensate for the acidity from the thermal dissociation of K2S2O8, and triethylamine was used to neutralize the carboxyl acid from AA. The results showed that the stable latexes with core/shell structure were synthesized by this method, and higher GMA content or addition at earlier stage led to forming the latexes with higher content of coagulum and bigger sized particles. During the formation of films, the polymer epoxy groups underwent the crosslinking reaction with carboxyl acid. When the GMA content increased or GMA was introduced at a later stage, high crosslinking extent was formed in the films. As a result, the crosslinking provided the films with improved water resistance, chemical resistance, tensile strength, hardness, abrasion resistance, and thermal stability. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of acrylic latexes - Preparation of acrylic films - Measurements and characterization - RESULT AND DISCUSSION : Effect of the GMA on the properties of the latexes - Effect of GMA on the properties of the latex films DOI : 10.1007/s11998-016-9808-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9808-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27244 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
18514	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Epoxy functionalization of multiwalled carbon nanotubes for their waterborne polyurethane composite with crosslinked structure / Shaohui Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 91-100 Titre : Epoxy functionalization of multiwalled carbon nanotubes for their waterborne polyurethane composite with crosslinked structure Type de document : texte imprimé Auteurs : Shaohui Wang, Auteur ; Huafeng Duan, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Jianbin Wu, Auteur ; Shasha Li, Auteur ; Ziyuan Yang, Auteur ; Xiaogang Hao, Auteur Année de publication : 2020 Article en page(s) : p. 91-100 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Caractérisation Composites -- Propriétés mécaniques Conduction électrique Epoxydes Nanotubes de carbone à parois multiples Un nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets : - le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ; - le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier. Polymères en émulsion Polyuréthanes Résistance à l'humidité:Résistance à l'eau Réticulation (polymérisation) Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In order to achieve covalent bond between multiwalled carbon nanotubes (MWCNTs) and waterborne polyurethane (WPU), pristine MWCNTs were first oxidized by strong acids and then underwent ring-opening reaction with epoxy resin to chemically attach epoxy moiety onto their surface. For fabrication of the MWCNTs/WPU composite, the epoxy moiety facilitates the dispersion of MWCNTs in the polymer matrix and could react with carboxylic acid or amine groups in the WPU macromolecules to form a crosslinked structure in their composite, resulting in a great improvement in their mechanical property, thermal stability, water resistance, and electrical conductivity. As the content of MWCNTs reached 1.5 wt%, the tensile strength of functionalized MWCNTs composite was improved by about 108% and the electrical conductivity was increased by six orders of magnitude compared to that of the pristine MWCNTs composite. Note de contenu : - EXPERIMENTAL : Materials - Preparation of epoxy-functionalized MWCNTs - Synthesis of WPU and fabrication of MWCNTs/WPU composites - Characterization - RESULTS AND DISCUSSION : Characterization of the functionalized MWCNTs - Mechanical properties of MWCNTs/WPU composites - Dynamic mechanical properties of MWCNTs/WPU composites - Dispersion and interfacial adhesion of MWCNTs in/with WPU matrix - Water resistance of MWCNTs/WPU composites - Thermalstability of MWCNTs/WPU composites - Electrical conductivity properties of MWCNTs/WPU composites DOI : 10.1007/s11998-019-00242-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00242-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33730 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21517	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Preparation, properties and application of waterborne hyydroxyl-functional polyurethane/acrylic emulsions in two-component coatings / Guozhang Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 3 (05/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 3 (05/2015) . - p. 505-512 Titre : Preparation, properties and application of waterborne hyydroxyl-functional polyurethane/acrylic emulsions in two-component coatings Type de document : texte imprimé Auteurs : Guozhang Ma, Auteur ; Taotao Guan, Auteur ; Caiying Hou, Auteur ; Jianbing Wu, Auteur ; Gang Wang, Auteur ; Xuan Ji, Auteur ; Baojun Wang, Auteur Année de publication : 2015 Article en page(s) : p. 505-512 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Caractérisation Copolymère uréthane acrylique Copolymères en émulsion Dureté (matériaux) Matériaux hybrides Mouillabilité Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements bi-composant:Peinture bi-composant Index. décimale : 667.9 Revêtements et enduits Résumé : A serious of waterborne hydroxyl-functional polyurethane/acrylic (PUA) emulsions for two-component coatings was prepared by copolymerizing different weight ratios of hydroxyethyl acrylate (HEA)/butyl acrylate (BA) with methyl methacrylate and acrylic-terminated polyurethane dispersion via an emulsion process. The results showed that increasing the weight ratio of HEA/BA led to a decrease in the average particle sizes and a narrowing in the particle size distribution, but an increase in the viscosity of their emulsions. Meanwhile, their films showed increased thermal resistance, adhesion on substrate, tensile strength, and hardness, but decreased water resistance and enhanced wettability. When the emulsions were applied in two-component coatings, their water resistance was greatly improved and the wettability was reduced; in addition, their glass transition temperature, thermal stability, adhesion on substrate, tensile strength, and hardness were further increased. It was suggested that hydroxyl groups of PUA can not only engage in the intramolecular and/or intermolecular hydrogen bonding, but also form covalently crosslinked networks with polyisocyanate in their films. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PUA hybrid emulsions - Application in two-component coatings and preparation of their films - Measurements and characterization - RESULTS AND DISCUSSION : The performance of PUA hybrid emulsions - The FTIR and thermal behaviors of the films - The water wettability and water absorption of the films - The adhesion of the coatings - The mechanical properties and hardness of the films DOI : 10.1007/s11998-014-9647-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9647-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24174 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
17244	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Synthesis of fluorinated polyacrylic acrylate oligomer for the UV-curable coatings / Jianbing Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 3 (05/2019) . - p. 681-688 Titre : Synthesis of fluorinated polyacrylic acrylate oligomer for the UV-curable coatings Type de document : texte imprimé Auteurs : Jianbing Wu, Auteur ; Ruofei Zhang, Auteur ; Ping Li, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Hui Zhang, Auteur Année de publication : 2019 Article en page(s) : p. 681-688 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Copolymère acrylate polyacrylique fluoré Essais (technologie) Fourier, Spectroscopie infrarouge à transformée de Hydrophobie Oléophobie Oligomères Résistance à l'humidité:Résistance à l'eau Résistance chimique Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Stabilité thermique Surfaces (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : A series of novel fluorinated polyacrylic acrylate oligomers with different fluorine contents were successfully prepared by acid–epoxy reaction between acrylic acid and a glycidyl methacrylate (GMA)-functional acrylic copolymer, which was presynthesized by traditional free radical polymerization in solvent with ethyl methacrylate, n-butyl acrylate, dodecafluoroheptyl methacrylate, and GMA. The UV-curable coatings were prepared with various amounts of the obtained fluorinated polyacrylic acrylate oligomer. The influences of fluorine content on the properties of UV-curable films were investigated by the tests of hydrophobicity, oleophobicity, thermal stability, water absorption, hardness, and chemical resistance. The results showed that the water contact angle of cured films increased from 78.5° to 104.5°, n-hexadecane contact angles increased from 12.3° to 43.4°, the water absorption decreased from 1.27% to 0.63%, while the fluorine content of the cured films increased from 0 to 5.7 wt%. In addition, thermal stability and chemical resistance of the curable films containing fluorinated oligomer were also clearly improved. Note de contenu : - EXPERIMENTAL : Materials - Preparation of fluorinated polyacrylic acrylate oligomer (FPAO) - Preparation of UV-curable coatings - Instrument and characterization - RESULTS AND DISCUSSION : Synthesis and characterization of the FPAO - Effect of the content of FPAO on the properties of UV films DOI : 10.1007/s11998-018-0145-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0145-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32581 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
20953	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 5 / 5)