Bio-based reactive diluent derived from cardanol and its application in polyurethane acrylate (PUA) coatings with high performance / Yun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 2 (03/2019) . - p. 499-509 Titre : Bio-based reactive diluent derived from cardanol and its application in polyurethane acrylate (PUA) coatings with high performance Type de document : texte imprimé Auteurs : Yun Hu, Auteur ; Guodong Feng, Auteur ; Qianqian Shang, Auteur ; Caiying Bo, Auteur ; Puyou Jia, Auteur ; Chengguo Liu, Auteur ; Feng Xu, Auteur ; Yonghong Zhou, Auteur Année de publication : 2019 Article en page(s) : p. 499-509 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux Caractérisation Cardanol Chimie -- Essais et réactifs Copolymère uréthane acrylate Diluants Huile de ricin et constituants Polymères hautes performances Revêtements -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : A UV-curable cardanol-based monomer (ECGE) was prepared using cardanol and epichlorohydrin, followed by epoxidation of the unsaturation in alkyl side chains of cardanol segments. After its chemical structure was confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance (1H NMR), ECGE was used as a reactive diluent to copolymerize with castor oil-based polyurethane acrylate (PUA) and a series of UV-curable coatings were prepared. Results showed that the viscosity and volume shrinkage of the UV-curable PUA system decreased significantly after the introduction of cardanol-based monomer while maintaining reasonably high bio-renewable contents; when containing 50% of ECGE, the biomass content reaches 66.2%, which is 1.41 times that of pure resin. In addition, the coating properties were evaluated to determine hardness, adhesion, flexibility, and water resistance. The properties of UV-curable thermoset were also studied using tensile testing, dynamic mechanical thermal analysis, and thermogravimetric analysis. The cardanol-based coatings showed excellent adhesion, flexibility, medium hardness, and enhanced char yield although tensile strength, tensile modulus and glass transition temperatures were somewhat diminished. All these performances can be attributed to the unique architectures of ECGE that combined the structural features of rigid benzene ring and long flexible alkyl chains. The UV-curing behavior was determined using real-time IR, and the results indicated that the conversion of unsaturated bond was increased with more concentration of ECGE. Note de contenu : - MATERIALS - Characterization - Synthesis of epoxidized cardanol glycidyl ether (ECGE) - Preparation of the UV-curable coatings - RESULTS AND DISCUSSION : Structure characterization of ECG - Bio-based content of the UV-curable coatings - Viscosity - UV-curing behaviors of the UV-curable bio-based coatings - Volumetric shrinkage of the UV-curable coatings - Gel contents of the UV-curable coatings - Tensile properties - DMA of the UV-curable bio-based coatings - Thermal properties of the UV-curable bio-based coatings - Coatings properties of the UV-curable bio-based coatings - Proposed dual-curing mechanism DOI : 10.1007/s11998-018-0128-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0128-6 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32420 [article]

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