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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]
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 filmsDOI : 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 : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27244
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 973-980[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18514 - 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]
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 filmsDOI : 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 : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32581
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 3 (05/2019) . - p. 681-688[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20953 - Périodique Bibliothèque principale Documentaires Disponible