Sorbitol-based aqueous cyclic carbonate dispersion for waterborne nonisocyanate polyurethane coatings via an environment-friendly route / Zhijun 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. 721-732 Titre : Sorbitol-based aqueous cyclic carbonate dispersion for waterborne nonisocyanate polyurethane coatings via an environment-friendly route Type de document : texte imprimé Auteurs : Zhijun Wu, Auteur ; Jingtao Dai, Auteur ; Liuyan Tang, Auteur ; Jinqing Qu, Auteur Année de publication : 2019 Article en page(s) : p. 721-732 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides Caractérisation Carbonate cyclique Revêtements en phase aqueuse Revêtements sans isocyanates Rhéologie Sorbitol Index. décimale : 667.9 Revêtements et enduits Résumé : The cyclic carbonate derivatives carrying carboxyl groups were prepared via the reaction of the sorbitol-based cyclic carbonate (SC) with anhydrides including succinic anhydride, o-phthalic anhydride, and maleic anhydride. (Succinic anhydride-, o-phthalic anhydride-, and maleic anhydride-based cyclic carbonates were named SSC, PSC, and MSC, respectively.) The structures of SC, SSC, PSC, and MSC were characterized by 1H NMR and FTIR. Then, the novel sorbitol-based aqueous cyclic carbonate dispersion was prepared. It was found that SSC dispersion possessed excellent stability and its particle sizes ranged from 63 to 174 nm with −73.3 to −48.2 mV for the zeta potentials. A series of novel waterborne nonisocyanate polyurethanes coatings (WNIPU) were successfully prepared by sorbitol-based cyclic carbonate reacted with diamines. The effects of diamine categories and the molar ratios of isophorone diamine (IPDA) and hexamethylene diamine (HMDA) on the properties of WNIPU were studied. The results showed that the pencil and pendulum hardness of WNIPU coatings were all relatively decreased with the increase in HMDA contents. The WNIPU coatings exhibited excellent flexibility, adhesion, gloss, and impact resistance with the molar ratios of IPDA/HMDA ranging from 1:1 to 1:3. Moreover, cured films display good thermal stabilities with only 5% weight loss (T5%) in temperatures ranging from 246 to 272°C. Note de contenu : - EXPERIMENTAL : Materials - Preparation of sorbitol-based cyclic carbonate (SC) - Preparation of succinic anhydride (SA)-, maleic anhydride (MAH)-, o-phthalic anhydride (PA)- based aqueous cyclic carbonate dispersions - Preparation of WNIPU coatings - Characterization of SC and WNIPU coatings - RESULTS AND DISCUSSION : Synthesis and characterization of SC - Preparation and characterization of succinic anhydride (SA)-, maleic anhydride (MAH)-, o-phthalic anhydride (PA)-based aqueous cyclic carbonate dispersions - Synthesis and characterization of WNIPU coatings - Properties of WNIPU coatings DOI : 10.1007/s11998-018-00150-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0150-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32585 [article]

Réservation

Réserver ce document

Exemplaires (1)

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

Synthesis and properties of fluorinated non-isocyanate polyurethanes coatings with good hydrophobic and oleophobic properties / Zhijun Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1233-1241 Titre : Synthesis and properties of fluorinated non-isocyanate polyurethanes coatings with good hydrophobic and oleophobic properties Type de document : texte imprimé Auteurs : Zhijun Wu, Auteur ; Liuyan Tang, Auteur ; Jingtao Dai, Auteur ; Jinqing Qu, Auteur Année de publication : 2019 Article en page(s) : p. 1233-1241 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Carbonate cyclique Fluoropolymères Hydrophobie Oléophobie Polymères -- Synthèse Revêtements organiques Revêtements sans isocyanates Index. décimale : 667.9 Revêtements et enduits Résumé : To improve the chemical resistance of non-isocyanate polyurethane (NIPU), two kinds of diglycidyl ether, bisphenol AF (E-AF) and perfluorooctyl glycidyl ether (PFGE), were selected to synthesize two different cyclic carbonates, bisphenol AF (EC-AF) and perfluorooctyl cyclic carbonate (PFGC), respectively. These cyclic carbonates were successfully used to prepare fluorine-containing non-isocyanate polyurethane coatings. The effects of PFGC amounts on the properties of NIPU were studied, and it was found that the contact angles of water, diiodomethane, and hexadecane were increased with the addition of PFGC and up to 106.7°, 80.2°, and 72.7°, respectively, whereas the pendulum hardness of NIPU coatings relatively decreased with the increase in PFGC contents. The NIPU coatings exhibited excellent flexibility, adhesion, and impact resistance. They also displayed good thermal stability with 5% weight loss temperature (T5%) ranging from 249 to 271°C. Moreover, these coatings possessed very low water uptake, excellent hydrophobic/oleophobic properties, and corrosion resistance properties. Note de contenu : - EXPERIMENTAL : Materials - Preparation of EC-AF and PFGC - Preparation of NIPU coatings - Characterization - RESULTS AND DISCUSSION : Synthesis and characterization of EC-AF and PFGC - Synthesis and characterization of NIPU coatings DOI : 10.1007/s11998-019-00195-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00195-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33007 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21154	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 2 / 2)