Photostabilization and cure kinetics of UV-curable optical resins containing photostabilizers

Cho, Jung Dae; Kim, Sung Hwa; Chang, In Cheol; Kim, Kwon Seok; Hong, Ji Won

doi:10.1007/bf03218831

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…R p is the photopolymerization rate, dH/dt is the heat flow measured through photo DSC, m is the mass of the monomer, and ΔH p is the polymerization enthalpy for the acrylate double bond (ΔH p = 684 kJ/kg): ----------------------------------------------------------- ------------------ --------------------------100  Here, a(t) is the conversion rate and ΔH sample(t) is the polymerization enthalpy for the acrylate double bond of the tested sample. 13,14) Fig. 4(a) demonstrates the effect of the content of the photoinitiator on the photopolymerization rate.…”

Section: Resultsmentioning

confidence: 99%

Ink-Jet 3D Printability of Ceramic Ink with Contact Angle Control

Park¹,

Lee²,

Kim³

et al. 2019

J. Korean Ceram. Soc

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Ink-jet printing technology, which utilizes a digitalized design to print fine ink directly on a substrate, has been of interest in various industries due to its high efficiency and adaptability to various materials. Recently, active attempts have been made to apply ceramic materials having excellent heat resistance, light resistance, and chemical resistance to the ink-jet printing process. In this study, ceramic ink was synthesized by combining ceramic pigments with UV curable polymer. 3D printability at various contact angles between ceramic ink and substrate was analyzed in detail. Rheological properties of the synthesized ceramic ink were optimized to meet the requirements of the ink-jet printing process, and the contact angle of UV curable ceramic ink was controlled through surface treatment of the substrate. The potential for additive manufacturing of ceramic material using ink-jet printing was investigated by analyzing the effect of contact angle control on ceramic ink droplets and their 3D printability.

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Section: Resultsmentioning

confidence: 99%

Ink-Jet 3D Printability of Ceramic Ink with Contact Angle Control

Park¹,

Lee²,

Kim³

et al. 2019

J. Korean Ceram. Soc

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“…17,18 The photostabilization effect of the cyclic HALS on the photooxidation of PS was studied in the presence of Tinuvin P, a UV absorber, in order to increase the photostabilization efficiency of the cyclic HALS. Figure 7 shows the changes in the CI of the PS films containing the cyclic HALS and Tinuvin P as a function of the concentration of the latter upon irradiation with 254 nm UV light.…”

Section: Scheme IVmentioning

confidence: 99%

Synthesis of cyclic diepoxide — HALS addition polymers and their photostabilizing effects on styrenic polymers

Chae

Kim

2010

Macromol. Res.

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A new cyclic, hindered amine light stabilizer (HALS) was prepared by the addition polymerization of a diepoxide and 4-amino-2,2,6,6-tetramethylpiperidine, and its photostabilizing effects on styrenic polymers were examined. The chemical structure of cyclic HALS was characterized by MALDI-TOF mass spectrometry. The prepared cyclic HALS had a moderate molecular weight (M w = 900~1,100) and high thermal stability (T d ≈ 300 o C) that were compatible with styrenic polymers, such as polystyrene and styrene-butadiene rubber. The photostabilization effect of cyclic HALS was similar to or better than that of Tinuvin 770, a commercially available polymeric HALS. A synergistic effect between cyclic HALS and a UV absorber on the inhibition of photooxidation was observed.

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“…E-mail: sungkim@khu.ac.kr compatibility with organic film to enhance the adhesion properties of the coating layer. [8][9][10] Organic-inorganic hybrid material coating was also utilized to improve the weatherability, 11,12 staining resistance, 13 corrosion resistance, 14 antistatic, 15 gas barrier properties 16,17 as well as the surface hardness. 18 Recently UV-curing process is commonly used because it can reduce the curing time compared with thermal curing process.…”

Section: Introductionmentioning

confidence: 99%

Organic-inorganic hard coating layer formation on plastic substrate by UV curing process

Lee

Kim

2010

Macromol. Res.

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Efficient methods for making organic-inorganic hard coating layers on a polymethylmethacrylate substrate were developed and optimized to improve the mechanical and optical properties. Colloidal silica was coupled with methacryloxypropyltrimethoxysilane to make Si-O-Si bonds before incorporating them into the organic phase of the monomer and oligomer. A combination of photoinitiators with different absorption bands could utilize the UV light throughout the entire wavelength range to show better curing results than the case of a single photoinitiator with a limited absorption band. The effects of the photoinitiator in terms of the mixing ratio and concentration in the coating solution were examined and optimized. The UV curing reactivity was improved using a mixture of different initiators with different absorption bands, and 4:1 ratio mixture of Irgacure 184 and Irgacure 907 showed the best hard coating properties, such as hardness and impact strength. The optimum initiator content was determined to be 5 wt% in the hard coating solution. However, too much initiator resulted in excessive primary radical reactions of the monomers, and the competition of primary radicals reduced the conversion and initiator efficiency.

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Photostabilization and cure kinetics of UV-curable optical resins containing photostabilizers

Cited by 6 publications

References 15 publications

Ink-Jet 3D Printability of Ceramic Ink with Contact Angle Control

Ink-Jet 3D Printability of Ceramic Ink with Contact Angle Control

Synthesis of cyclic diepoxide — HALS addition polymers and their photostabilizing effects on styrenic polymers

Organic-inorganic hard coating layer formation on plastic substrate by UV curing process

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