Synthesis of hydroxy silane coupling agent and the silane-terminated polyurethane chain-extended by butanediol / Chi Quan-chao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1457-1466 Titre : Synthesis of hydroxy silane coupling agent and the silane-terminated polyurethane chain-extended by butanediol Type de document : texte imprimé Auteurs : Chi Quan-chao, Auteur ; Jian Li, Auteur ; Chen-yi Wang, Auteur ; Qiang Ren, Auteur Année de publication : 2022 Article en page(s) : p. 1457-1466 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Butanediol Caractérisation Composés organiques -- Synthèse Essais dynamiques Hydroxy silane Polymères -- Synthèse Polymères à terminaison silane Polyuréthanes Réaction de couplage Résistance à l'humidité Résistance à la traction Réticulation à l'humidité Revêtements -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : A novel hydroxy silane coupling agent (HO-silane) was synthesized via Michael addition reaction between 2-hydroxyethyl acrylate and 3-mercaptopropyl-trimethoxysilane, which was then used to synthesize the silane-terminated polyurethane (SPU). The silane-terminated polyurethanes, which showed low viscosity due to the end-capping by HO-silane, could be chain-extended by butanediol to enhance the performance of SPU in non-solvent condition. The effects of chain extender, 1,4-butanediol, and NCO/OH molar ratio (R value) on the properties of silane-terminated polyurethane were investigated. The results show that the hydroxy silane coupling agent and the silane-terminated polyurethane that can be moisture-cured at ambient temperature were successfully synthesized. It is found that by introducing the 1,4-butanediol segment into SPU main chain, the viscosity of SPU was increased, but the tack free time of SPU was shortened, and the hardness and tensile strength of the moisture-cured SPU film were enhanced. As the R value increased, the tack free time of the silane-terminated polyurethane was prolonged, and the hardness and the tensile strength of the moisture-cured film were increased, but the elongation at break was decreased. When the amount of 1,4-butanediol was 10 wt% and the R value was 1.3, respectively, silane-terminated polyurethane with viscosity of 51,000 mPa·s (80% solid content) can be obtained. The tensile strength of the moisture-cured film was 1.1 MPa, and the elongation at break was 713.4%, which shows great potential for sealant and coating applications. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of hydroxy silane coupling agent (HO-silane) - Synthesis and moisture curing of SPU - Characterization - RESULTS AND DISCUSSION : Synthesis of silane terminated polyurethane (SPU) - Tack free time of SPU - The performance of SPU - The effect of R value on the performance of SPU - Glass transition temperatures of moisture-cured films of SPU DOI : https://doi.org/10.1007/s11998-022-00619-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00619-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38283 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23672	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)