Design and properties of UV cured polyurethane dispersions

Kim, B.K.; Ahn, Byeong-Min; Lee, M.H.; Lee, S.K.

doi:10.1016/j.porgcoat.2005.09.015

Cited by 32 publications

(21 citation statements)

References 6 publications

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“…Further, it can be observed that the thermal stability increases gradually with an increase in the molar ratio of H 12 MDI to glycidol. This observed increase in the degradation temperature of EPUs is attributed to the presence of highly thermally stable moieties of glycidol …”

Section: Resultsmentioning

confidence: 93%

Influence of diisocyanate, glycidol and polyol molar ratios on the mechanical and thermal properties of glycidyl-terminated biobased polyurethanes

et al. 2017

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A series of epoxy-terminated polyurethanes (EPUs) were synthesized from castor oil, 4,4 ′ -methylenebis(cyclohexyl isocyanate) (H 12 MDI) and 2,3-epoxy-1-propanol (glycidol) by changing the molar ratio of H 12 MDI to glycidol to polyol. Fourier transform infrared, 1 H NMR and solid-state CP/MAS 13 C NMR spectroscopic analyses revealed the presence of epoxy linkages within the polyurethane backbone. Thermogravimetric analysis showed that EPU4 with a polyol:diisocyanate:glycidol molar ratio of 1:6:6 exhibited an initial decomposition temperature of 128 ∘ C, which was 26 ∘ C higher than that of EPU1 (1:3:3 molar ratio). Differential scanning calorimetry showed an upward shift in the glass transition temperature with increasing molar ratio. Mechanical analysis demonstrated that the tensile modulus of EPU4 was 7.8 times greater than that of EPU1. The crosslinking densities of EPUs were determined using swelling studies which revealed a gradual increase in crosslinking density with increasing epoxy content within the polyurethane. The morphologies of cryo-fractured surfaces of EPUs were determined through scanning electron microscopy to analyse the phase dispersion of epoxy and polyurethane.

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Section: Resultsmentioning

confidence: 93%

Influence of diisocyanate, glycidol and polyol molar ratios on the mechanical and thermal properties of glycidyl-terminated biobased polyurethanes

et al. 2017

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“…The final conversion by photo-DSC measurements was used as p to calculate the theoretical M c and X c . The crosslink density can also be determined experimentally by DMA based on the theory of rubber elasticity using the following equation [34,35]:…”

Section: Viscoelastic Properties By Dmamentioning

confidence: 99%

UV-curable low surface energy fluorinated polycarbonate-based polyurethane dispersion

Hwang

Kim

2011

Journal of Colloid and Interface Science

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“…The radiation curing process has been found to be an effective alternative to solvent borne technology in the coating industry [1]. Radiation curing technology, mostly UV curing, offers many advantages during the curing process, in relation to the ecology or environment, energy conservation, economics and in the excellent performance of products [2][3][4]. The most commonly used UV-curable formulations involve unsaturated acrylic oligomers, including epoxy acrylates, polyester acrylates, polyether acrylates, urethane acrylates and silicone acrylates [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Thermal properties and flame retardancy of an ether-type UV-cured polyurethane coating

Chen¹,

Tai²,

Song³

et al. 2010

Express Polym. Lett.

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Abstract.A new UV-reactive monomer piperazine-N,N′-bis(acryloxyethylaryl-phosphoramidate) (N-PBAAP) containing phosphorus and nitrogen was synthesized and used as flame retardant for an ether-type UV-cured polyurethane acrylate (PUA) coating. The thermal properties of the PUA films were investigated by thermogravimetric analysis (TGA) in air and nitrogen atmosphere. The TGA results showed that the incorporation of N-PBAAP can obviously enhance the char residue of the PUA coatings. From the TGA and real time Fourier transformed infrared spectroscopy (RT-FTIR) results, different degradation behaviors were observed in the PUA coatings with different N-PBAAP content. The combustibility of the PUA coatings was evaluated by microscale combustion calorimeter (MCC). The MCC results revealed that the addition of N-PBAAP in the coatings can significantly reduce the peak Heat Release Rate (pHRR), Heat Release Capacity (HRC) and the Total Heat Release (THR) of the samples. Furthermore, dynamical mechanical thermal analysis (DMA) was employed to examine the viscoelastic properties of the PUA films. It was found that the incorporation of N-PBAAP in the formulation can bring in more functional groups to the coatings, which results in an increase of the glass transition temperature (Tg) and cross linking density (XLD) of the films.

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Design and properties of UV cured polyurethane dispersions

Cited by 32 publications

References 6 publications

Influence of diisocyanate, glycidol and polyol molar ratios on the mechanical and thermal properties of glycidyl-terminated biobased polyurethanes

Influence of diisocyanate, glycidol and polyol molar ratios on the mechanical and thermal properties of glycidyl-terminated biobased polyurethanes

UV-curable low surface energy fluorinated polycarbonate-based polyurethane dispersion

Thermal properties and flame retardancy of an ether-type UV-cured polyurethane coating

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