Synthesis of UV-curable polyesters with lateral double bonds by ring-opening polymerization and their properties / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1591-1601 Titre : Synthesis of UV-curable polyesters with lateral double bonds by ring-opening polymerization and their properties Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Shujie Ming, Auteur ; Liuyan Tang, Auteur ; Jinqing Qu, Auteur Année de publication : 2021 Article en page(s) : p. 1591-1601 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides Caractérisation Catalyseurs Copolymère vinyle ester Copolymérisation Epoxydes Monomères Oligomères Photoréticulation Polyesters Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Stabilité thermique Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : UV-curable coatings have been receiving more and more attention for their high performance and environmentally friendly advantages, which meet the “5 E” requirements of coating development. Vinyl oligomer is the main factor affecting the performance of UV-curable coating, but it is difficult to meet the requirements of high-end UV curing technology due to its high viscosity, low vinyl functionality, and high cost. Herein, polyesters with lateral double bonds were prepared by ring-opening polymerization of acid anhydride and glycidyl methacrylate. The epoxy compound without vinyl groups was used to participate in the polymerization reaction to adjust the viscosity and vinyl functionality of the resin. Furthermore, the molecular structure and molecular weight of the polyesters were characterized by FTIR, 1H NMR, and GPC. The effects of the categories and proportions of acid anhydride and glycidyl ether on the viscosity and hardness of the coating films were studied. The results indicated that the use of acid anhydrides containing phenyl rigid groups could significantly increase the hardness of the paint film, and the long-chain tertiary glycidyl carbonate (E10P) had the best viscosity reduction effect. When the molar ratio of acid anhydride, GMA and E10P was 4:1:3, the viscosity of the prepared vinyl polyester was low to 2755 mPa·s. In this case, the hardness of the paint film was as high as H, and it also exhibited excellent water resistance and alcohol resistance. Note de contenu : - EXPERIMENTAL : Materials - Preparation of UV-curable polyesters with lateral double bonds - Characterization - RESULTS AND DISCUSSION : Influencing factors of polyester performances - Structural characterization of the polyesters - Analysis of photocuring behavior of the polyesters - Thermal stability of the polyesters - Film properties of the polyesters - Table 1 : Effect of glycidyl methacrylate content on the properties of the polyesters - Table 2 : Effect of anhydride type on the properties of the polyesters - Table 3 : Effect of different epoxy monomers on the properties of the polyesters - Table 4 : Copolymerization of PA and epoxides - Table 5 : Selection of different ring-opening catalysts - Table 6 : GPC results of the polyesters - Table 7 : The film properties of the polyester DOI : https://doi.org/10.1007/s11998-021-00513-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00513-w.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36818 [article]

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