A novel acrylate-PDMS composite latex with controlled phase compatibility prepared by emulsion polymerization / Weili Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1259-1269 Titre : A novel acrylate-PDMS composite latex with controlled phase compatibility prepared by emulsion polymerization Type de document : texte imprimé Auteurs : Weili Li, Auteur ; Wenjun Shen, Auteur ; Wei Yao, Auteur ; Jijun Tang, Auteur ; Jie Xu, Auteur ; Lei Jin, Auteur ; Jide Zhang, Auteur ; Zexiao Xu, Auteur Année de publication : 2017 Article en page(s) : p. 1259-1269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Copolymère silicone acrylate Hydrophobie Latex Polymérisation en émulsion Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, a series of acrylate-polydimethylsiloxane (PDMS) composite latexes was prepared and studied systematically to find the factors that affect their performances. At first, the modified PDMS was synthesized to react with acrylate monomers and participate in free radical polymerization. Then, the modified PDMS was blended with acrylate monomers, and the acrylate-PDMS composite latexes with different formulas were obtained by emulsion polymerization. Because the blending monomers were constrained in the micelle, the two components were interconnected with each other by a covalent bond and the phase compatibility between the two components could be controlled well. Chemical constitution and the morphology of acrylate-PDMS composite latexes were confirmed by using FTIR spectroscopy, TEM, and SEM measurements, respectively. Thermophysics and heat resistance of the dried coatings based on acrylate-PDMS composite latexes were studied using DSC and TGA tests, respectively. Anticorrosion properties of the cured coatings based on acrylate-PDMS composite latexes were confirmed by potentiodynamic polarization test. With low surface tension, good toughness, excellent weather-proof properties, and good high and low temperature stability, the modified PDMS component can improve the performance of the traditional acrylate latex-based waterborne resin effectively, and the prepared acrylate-PDMS composite latexes can be used in heavy-duty anticorrosion applications. Note de contenu : - EXPERIMENT : Materials - Preparation of modified PDMS - Preparation of acrylate-PDMS composite latex - Coating procedure - Characterization - RESULTS AND DISCUSSION : FTIR measurement - Morphology measurements - Study on the influence of acrylate component on the properties of acrylate-PDMS composite latexes - Study on the influence of the modified PDMS on acrylate-PDMS composite latexes DOI : 10.1007/s11998-017-9923-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9923-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29626 [article]

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Study of the properties of novel hybrid coatings under the influence of phase compatibility / Huang Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 4 (07/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 4 (07/2016) . - p. 691-701 Titre : Study of the properties of novel hybrid coatings under the influence of phase compatibility Type de document : texte imprimé Auteurs : Huang Dong, Auteur ; Jun Wang, Auteur ; Jijun Tang, Auteur ; Wenjun Shen, Auteur ; Weili Li, Auteur ; Jing Zhang, Auteur ; Zexiao Xu, Auteur Année de publication : 2016 Article en page(s) : p. 691-701 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymérisation Polyacryliques Polyaddition Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Réaction de couplage Réticulants Réticulation (polymérisation) Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, a series of hybrid coatings were prepared and characterized. At first, polydimethylsiloxane modified with siliane coupling agent was copolymerized with acrylate monomers by free radical polymerization to get the hybrid resins. Due to the combination of covalent bond, the prepared hybrid resins were uniform and transparent. Then a series of hybrid resins were cured with tetraethoxysilane and dibutyltin dilaurate as the crosslinker and catalyst, respectively. The blends were loaded onto the substrate, such as tin plate, steel panels, or flat glass, and cured by heating to form hybrid coatings. To study the factors on the properties of the prepared hybrid resins and cured coatings, various measurements were carried out, such as FTIR, TGA, DSC, laser optical microscope, water contact angles, pencil scratch hardness, and the electrochemistry test. Thanks to the combination of covalent bond, the two components dispersed uniformly in the prepared hybrid resins and no cracks were observed from the cured hybrid coatings with an optical microscope. With excellent mechanical properties, thermal stability, corrosion resistance, and hydrophobic property, the prepared hybrid coatings can find application in the heavy-duty chemical industry. Note de contenu : - EXPERIMENTAL : Preparation of the hybrid resins - Coating procedure - Characterization - RESULTS AND DISCUSSION : FTIR measurements - Surface morphology - Thermal properties - Physical properties of the cured hybrid coatings - Anticorrosion behavior DOI : 10.1007/s11998-015-9776-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9776-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26749 [article]

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