Synthesis and characterization of cathodic electrodeposition coatings based on octadecyl-modified cationic waterborne polyurethanes / Xiaoling He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1255–1268 Titre : Synthesis and characterization of cathodic electrodeposition coatings based on octadecyl-modified cationic waterborne polyurethanes Type de document : texte imprimé Auteurs : Xiaoling He, Auteur ; Zhang Yu, Auteur ; Jingwei He, Auteur ; Fang Liu, Auteur Année de publication : 2020 Article en page(s) : p. 1255–1268 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Chaînes latérales octadécyl Dépôt électrolytique Hydrophobie Polymères -- Synthèse Polymères cationiques Polymères en émulsion Polyuréthanes Revêtements en phase aqueuse Revêtements organiques Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Aimed at increasing the hydrophobicity of cathodic electrodeposition (CED) coatings based on cationic waterborne polyurethanes (WPUs), a series of cationic WPUs with hydrophobic octadecyl side chains were successfully synthesized by introducing 1-monostearoyl-rac-glycerol as a diol chain extender. ATR-FTIR spectra and SEM images showed the degree of phase separation between soft segments and hard segments of cationic WPUs clearly increased by incorporating octadecyl groups. The water contact angle and water absorption studies showed that the water-resistance property of modified CED coatings was obviously enhanced because of the incorporation of a low surface energy unit and the formation of a more sophisticated surface induced by hydrogen bonds. The International Standardization test of paints and varnishes revealed that the CED films possessed excellent hardness, adhesion, flexibility, and impact resistance. Optical transmittance tests showed that the sample films possessed excellent optical transmittance of about 90%, and meanwhile, the thermostability of the film was promoted. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of cationic WPUs with octadecyl alkyl side chains - Preparation of cationic WPUs with octadecyl alkyl side chain films - Characterization - RESULTS AND DISCUSSION : Synthesis and characterization of cationic WPUs with octadecyl alkyl side chains - Emulsion property of cationic WPUs with octadecyl alkyl side chains - Properties of CED coatings based on cationic WPUs with octadecyl alkyl side chains - Optical transmittance of CED coatings based on cationic WPUs with octadecyl alkyl side chains - Surface morphology of CED coatings based on cationic WPUs with octadecyl alkyl side chains - Thermal stability of CED coatings based on cationic WPUs with octadecyl alkyl side chains - Water resistance of CED coatings based on cationic WPUs with octadecyl alkyl side chains DOI : https://doi.org/10.1007/s11998-020-00344-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00344-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34571 [article]

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