Synthesis, photopolymerization kinetics, and thermal properties of UV-curable waterborne hyperbranched polyurethane acrylate dispersions

Yin, Wei; Zeng, Xianlin; Li, Hongqiang; Youjun, Hou; Gao, Qiongzhi

doi:10.1007/s11998-011-9338-x

Cited by 33 publications

(19 citation statements)

References 25 publications

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“…Furthermore, the peak at 2274 cm –1 disappeared due to −NCO in trace (c), revealing that the reaction between TDI–HEA and HBWPU had completed. 18…”

Section: Results and Discussionmentioning

confidence: 99%

“…Figure 7a shows that the viscosity of ink will decrease with increasing content of HBWPUA/SiO 2 , which can be explained by the fact that viscosity is affected by intermolecular forces. 25,26 The higher the HBWPUA/SiO 2 content, the lower the number of particles in the multiunit system, causing less twine and physical interaction between particles, which decreases the viscosity. With the increase of shear rate, at first, the ink remains stable like Newtonian fluid, and then the viscosity decreases and the ink behaves like pseudo-plastic fluid, finally approaching a constant value.…”

Section: Results and Discussionmentioning

confidence: 99%

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Novel Waterborne UV-Curable Hyperbranched Polyurethane Acrylate/Silica with Good Printability and Rheological Properties Applicable to Flexographic Ink

Zhang¹,

Xu²,

Hu³

et al. 2017

ACS Omega

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Novel waterborne UV-curable hyperbranched polyurethane acrylate/silica (HBWPUA/SiO 2 ) nanocomposites were prepared by a three-step procedure and sol–gel method. 1 H NMR and 13 C NMR results indicate that HBWPU is successfully synthesized. Surface tension and contact angle tests both demonstrate the good wettability of the nanocomposites. Besides, the kinetics of photopolymerization of HBWPUA/SiO 2 films were analyzed by attenuated total reflection-Fourier transform infrared spectroscopy, which reveals that the modified SiO 2 could accelerate the curing speed of HBWPUA coatings. Thermal gravity analysis indicates that the HBWPUA/SiO 2 hybrid films have a better thermal stability than the pure HBWPUA cured films. Furthermore, the hybrid films show enhanced pencil hardness, abrasion resistance, and adhesion. On the basis of the above, HBWPUA/SiO 2 nanocomposites were finally applied to waterborne UV-curing flexographic printing ink, which is printed on poly(ethylene terephthalate) and glass. The nanocomposite presents good rheological behavior because the ink has a lower Z 0 , a higher Z ∞ , and the viscosity rebuild time is 375 s. Three colors (red, yellow, and blue) of ink were used to test its printing quality, the curing time was below 30 s, and the adhesion was excellent without being stripped. All of the inks show good water resistance and abrasion resistance. Moreover, the red and blue inks possess better solid densities than the value of 1.07 of yellow ink, and are 1.83 and 1.84, respectively. The current study suggests that the process has promise in applications of food packages.

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“…Furthermore, the peak at 2274 cm –1 disappeared due to −NCO in trace (c), revealing that the reaction between TDI–HEA and HBWPU had completed. 18…”

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Novel Waterborne UV-Curable Hyperbranched Polyurethane Acrylate/Silica with Good Printability and Rheological Properties Applicable to Flexographic Ink

Zhang¹,

Xu²,

Hu³

et al. 2017

ACS Omega

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“…When UVCF content was high, the viscosity of the formulations drastically increased, which led to the limited mobility of reactive chains. Moreover, with high double bonds concentration, the photopolymerization easily occurred on the surface and formed the cross-linking structures, which might affect the mobility of reactive chain and the entrance of UV irradiation into the cured film [26].…”

Section: Effect Of Uvcf Content On Photopolymerization Convermentioning

confidence: 99%

Preparation and Characterization of UV-Curable Cyclohexanone-Formaldehyde Resin and Its Cured Film Properties

Yang

Lai

et al. 2014

International Journal of Polymer Science

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UV-curable cyclohexanone-formaldehyde (UVCF) resin was prepared with cyclohexanone-formaldehyde (CF) resin, isophorone diisocyanate (IPDI), and pentaerythritol triacrylate (PETA) as base substance, bridging agent, and functional monomer, respectively. The structure of UVCF was characterized by Fourier transform infrared spectroscopy (FT-IR),1H-nuclear magnetic resonance spectroscopy (1H-NMR), and gel permeation chromatography (GPC). The viscosity and photopolymerization behavior of the UV-curable formulations were studied. The thermal stability and mechanical properties of the cured films were also investigated. The results showed that UVCF resin was successfully prepared, the number of average molecular weight was about 2010, and its molecular weight distribution index was 2.8. With the increase of UVCF resin content, the viscosity of the UV-curable formulations increased. After exposure to UV irradiation for 230 s, the photopolymerization conversion of the UV-curable formulations was above 80%. Moreover, when the UVCF content was 60%, the formulations had high photopolymerization rate, and the cured UVCF films showed good thermal stability and mechanical properties.

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“…The ideal molecular formula of H20 is illustrated in Scheme 1 [1]. Because of these unique structures and excellent properties, hyperbranched polymers have received a lot of attention [2].…”

Section: Introductionmentioning

confidence: 99%

“…Hyperbranched polymers with three dimensional structures and a large number of end-groups, show high solubility, high activity and low viscosity characteristics in chemical reactions, a good example is the hyperbranched polyester (H20). The ideal molecular formula of H20 is illustrated in Scheme 1 [1]. Because of these unique structures and excellent properties, hyperbranched polymers have received a lot of attention [2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of a Hyperbranched Polyester Quaternary Ammonium Surfactant

Zhou

Wang

2014

J Surfact & Detergents

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In the presence of the alkaline catalyst sodium hydroxide, the intermediate of hyperbranched polyester (H20Cl) was prepared by the modification of the hyperbranched polyester Boltorn H20 with epichlorohydrin. Then a new kind of quaternary ammonium functionalized hyperbranched polyester (H20C16 N) was synthesized by the reaction of H20Cl and hexadecyldimethylamine. The characteristics of H20C16 N were determined by FT-IR, 1 H NMR and TGA. The molecular and molecular weight distribution of H20C16 N were determined by Gel Permeation Chromatography (GPC) and the surface activities of H20C16 N including surface tension (c) and the critical micelle concentration (CMC) were measured at 25°C. The H20C16 N reduced the surface tension of water to 30.81 mN/m at concentration levels of 7.94 9 10 -5 mol L -1 and micellization free energies of the quaternary ammonium salt in its solution showed a good tendency towards adsorption at interfaces. The H20C16 N was applied to the silk fabric. An antimicrobial test of the treated fabrics against Escherichia coli and Staphylococcus aureus was carried out. SEM and XPS analysis were performed to study the dispersion of H20C16 N onto the fabric. All results exhibited excellent antibacterial properties of the hyperbranched polyester quaternary ammonium salt.

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Synthesis, photopolymerization kinetics, and thermal properties of UV-curable waterborne hyperbranched polyurethane acrylate dispersions

Cited by 33 publications

References 25 publications

Novel Waterborne UV-Curable Hyperbranched Polyurethane Acrylate/Silica with Good Printability and Rheological Properties Applicable to Flexographic Ink

Novel Waterborne UV-Curable Hyperbranched Polyurethane Acrylate/Silica with Good Printability and Rheological Properties Applicable to Flexographic Ink

Preparation and Characterization of UV-Curable Cyclohexanone-Formaldehyde Resin and Its Cured Film Properties

Synthesis and Application of a Hyperbranched Polyester Quaternary Ammonium Surfactant

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