A facile approach to UV-curable super-hydrophilic polyacrylate coating film grafted on glass substrate / Tao Liang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 6 (11/2016) . - p. 1115-1121 Titre : A facile approach to UV-curable super-hydrophilic polyacrylate coating film grafted on glass substrate Type de document : texte imprimé Auteurs : Tao Liang, Auteur ; Hongqiang Li, Auteur ; Xuejun Lai, Auteur ; Xiaojing Su, Auteur ; Lin Zhang, Auteur ; Xingrong Zeng, Auteur Année de publication : 2016 Article en page(s) : p. 1115-1121 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Hydrophilie Polyacrylates Revêtements -- Séchage sous rayonnement ultraviolet Revêtements anti-buée:Peinture anti-buée Verre -- Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : The super-hydrophilic polymer coating film can easily be be peeled off from a substrate with the existence of water, which is a fatal drawback in practical applications. Herein, a facile approach is proposed to prepare UV-curable super-hydrophilic polyacrylate coating film that is chemically grafted on the surface of γ-methacryloxypropyltrimethoxysilane-modified glass substrate. Fourier transform infrared spectroscopy and scanning electron microscopy confirmed that the polyacrylate coating films were successfully grafted onto the glass substrate and exhibited rough micro-groove structure. The obtained polyacrylate coating film possessed super-hydrophilicity with the water contact angle close to nearly zero as well as good transmittance and antifogging property. Note de contenu : - EXPERIMENTAL : Materials - Modification of glass substrate - Preparation of super-hydrophilic polyacrylate coating films chemically grafted on glass substrate - Characterization - RESULTS AND DISCUSSION : FTIR analysis - Surface morphology - Super-hydrophilicity - Transmittance - Antifogging property DOI : 10.1007/s11998-016-9828-y En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9828-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27269 [article]

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Kinetics and effect of surfactant and cosurfactant on miniemulsion polymerization of acrylate monomers / Hongqiang Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 959-966 Titre : Kinetics and effect of surfactant and cosurfactant on miniemulsion polymerization of acrylate monomers Type de document : texte imprimé Auteurs : Hongqiang Li, Auteur ; Xiaokang Ren, Auteur ; Xuejun Lai, Auteur ; Xingrong Zeng, Auteur Année de publication : 2014 Article en page(s) : p. 959-966 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Latex Miniémulsions Nucléation Polyacrylates Polymérisation en émulsion Surfactants Index. décimale : 667.9 Revêtements et enduits Résumé : The effects of the type and amount of the surfactant and cosurfactant on the miniemulsion polymerization of acrylate monomers were studied, and the comparison of the kinetics between miniemulsion polymerization and conventional emulsion polymerization was discussed in the presence of reactive surfactant allyloxy nonylphenol propyl polyoxyethylene (10), ether sulfate (DNS-86), and reactive cosurfactant stearyl methacrylate (SMA). The results showed that the obtained polyacrylate miniemulsion had a high monomer conversion rate and a low coagulum fraction, which were affected little by the surfactant and cosurfactant type. When the surfactant and cosurfactant amounts were all 2 wt%, the contact angle of the prepared polyacrylate miniemulsion with DNS-86/SMA and the water absorption fraction of the latex film were 39° and 8.3 wt%, respectively. FTIR results confirmed that DNS-86 and SMA took part in the polymerization of acrylate monomers. In the miniemulsion polymerization of acrylate monomers with DNS-86/SMA, monomer droplet nucleation was the main nucleation style. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of polyacrylate miniemulsion - Characterization - RESULTS AND DISCUSSION : Effect of surfactant on miniemulsion polymerization - Effect of cosurfactant on miniemulssion polymerization - Comparison of the kinetics of miniemulsion polymerization and conventional emulsion polymerization - FTIR analysis - Effect of SDS/HD ans DNS-86/SMA on the contact angle of polyacrylate miniemulsion and the water absorption fraction of latex film DOI : 10.1007/s11998-014-9601-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9601-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22318 [article]

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Preparation and characterization of UV-curable hyperbranched polyurethane acrylate / Qiongzhi Gao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 1 (01/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 1 (01/2011) . - p. 61-66 Titre : Preparation and characterization of UV-curable hyperbranched polyurethane acrylate Type de document : texte imprimé Auteurs : Qiongzhi Gao, Auteur ; Hongqiang Li, Auteur ; Xingrong Zeng, Auteur Année de publication : 2011 Article en page(s) : p. 61-66 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages. Caractérisation Polyesters Polymères ramifiés Réticulation (polymérisation) Revêtements -- Séchage sous rayonnement ultraviolet Urethanes Index. décimale : 667.9 Revêtements et enduits Résumé : A series of UV-curable hyperbranched polyurethane acrylate (HBPUA) oligomers were synthesized with isophorone diisocyanate (IPDI), hyperbranched polyester Boltorn H20 (HBP) and hydroxy-ethyl acrylate (HEA). The structure of HBPUA oligomers was characterized by Fourier transform infrared (FTIR) spectroscopy, 1H nuclear magnetic resonance (1H-NMR) spectroscopy, and gel permeation chromatography (GPC). The UV-curing kinetics of HBPUA films with Darocur 1173 were investigated, and their heat resistance and mechanical properties (including hardness, adhesion force, flexibility, and impact strength) were measured. The results show that the HBPUA oligomers have superior photosensitivity and the percent conversion of C=C reaches 81% when radiation time is 43 s. The heat resistance of the cured films decreased slightly with the increase in the content of the urethane-acrylate terminal group. Moreover, the mechanical properties of the cured films were influenced by the content of the OH group in HBP that reacted with the first NCO group of IPDI. When the content was 60%, the cured film had excellent overall properties. The hardness, flexibility, adhesion force, and impact strength were 4 H, 2 mm, 0 grade, and 47 kg cm, respectively. DOI : 10.1007/s11998-010-9285-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9285-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10923 [article]

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Steady rheological behaviors of UV-curable waterborne hyperbranched polyurethane acrylate dispersions / Wenhua Yin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 1 (01/2013) . - p. 57-64 Titre : Steady rheological behaviors of UV-curable waterborne hyperbranched polyurethane acrylate dispersions Type de document : texte imprimé Auteurs : Wenhua Yin, Auteur ; Xingrong Zeng, Auteur ; Hongqiang Li, Auteur ; Xiaodan Lin, Auteur ; Biye Ren, Auteur ; Zhen Tong, Auteur Année de publication : 2013 Article en page(s) : p. 57-64 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dispersions et suspensions Polyacrylates Polymères ramifiés Polyuréthanes Revêtements en phase aqueuse:Peinture en phase aqueuse Rhéologie Index. décimale : 667.9 Revêtements et enduits Résumé : A rotational rheometer was used to investigate the steady rheological behaviors of UV-curable waterborne hyperbranched polyurethane acrylate dispersions (WHBPUADs). The flow curves of WHBPUADs were fitted mathematically using the Cross model. The effects of many factors including solid content, concentration of hydrophilic groups, and degree of neutralization on the rheological behaviors were studied and discussed. It was found that the viscosity of WHBPUAD decreased with increasing shear rate, indicating that WHBPUAD was pseudoplastic. On the other hand, at the same shear rate, the viscosity of WHBPUAD increased with increasing solid content and degree of neutralization but decreased with increasing concentration of hydrophilic groups. The Cross model could describe the flow curve of WHBPUAD accurately, with square of correlation coefficient (R 2) above 0.9. Moreover, most of the zero-shear viscosity values (? 0) obtained by the Cross model were located in the range of 0.2–10 Pa·s, which could fully meet the practical application requirement. Note de contenu : - EXPERIMENTAL : Materials - Characterization (particle size measurement - Rheological measurements) - RESULTS AND DISCUSSION : Effect of solid content - Effect of concentration of hydrophilic groups - Effect of degree of neutralization DOI : 10.1007/s11998-012-9432-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9432-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17472 [article]

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Synthesis, photopolymerization kinetics, and thermal properties of UV-curable waterborne hyperbranched polyurethane acrylate dispersions / Wenhua Yin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 577-584 Titre : Synthesis, photopolymerization kinetics, and thermal properties of UV-curable waterborne hyperbranched polyurethane acrylate dispersions Type de document : texte imprimé Auteurs : Wenhua Yin, Auteur ; Xingrong Zeng, Auteur ; Hongqiang Li, Auteur ; Youjun Hou, Auteur ; Qiongzhi Gao, Auteur Année de publication : 2011 Article en page(s) : p. 577-584 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages. Cinétique chimique Fourier, Spectroscopie infrarouge à transformée de Photoréticulation Polymères ramifiés Polyuréthanes Réticulation (polymérisation) Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : A series of UV-curable waterborne hyperbranched polyurethane acrylate dispersions (WHBPUADs) were prepared via a three-step procedure based on isophorone diisocyanate (IPDI), hyperbranched polyester (HBP), maleic anhydride (MA), and hydroxy-ethyl acrylate (HEA). The structure of WHBPUADs was characterized by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance spectroscopy (1H NMR). FTIR was also applied to research the effect of double bond concentration on the kinetics of photopolymerization. The heat resistance of the cured films was characterized by thermogravimetric analysis (TGA), and their mechanical properties were also measured. The results showed that the double bond conversion (Ï„) and photopolymerization rate (R p) were affected by the concentration of double bond and viscosity of WHBPUADs. The UV-curable systems with higher double bond concentration and lower viscosity led to higher Ï„ and R p. The maximum Ï„ and R p reached 93% and 71 mmol g−1 s−1, respectively. The WHBPUADs films possessed better heat resistance and mechanical properties, and with the increase of crosslink density, the heat resistance and hardnesses were further improved. Note de contenu : EXPERIMENTAL : Materials - Synthesis of WHBPUADs RESULTS AND DISCUSSION : FTIR of WHBPUAD - 1H NMR spectrum of WHBPUAD - Photopolymerization kinetics - Film mechanical properties of WHBPUADs - TGA of cured films of WHBPUADs DOI : 10.1007/s11998-011-9338-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9338-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12233 [article]

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UV-curable superhydrophobic organosilicon/silica hybrid coating on cotton fabric for oil–water separation / Shan Gao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)  

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